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diff --git a/Models/Feynrules/python/ufo2peg/check_lorentz.py b/Models/Feynrules/python/ufo2peg/check_lorentz.py
--- a/Models/Feynrules/python/ufo2peg/check_lorentz.py
+++ b/Models/Feynrules/python/ufo2peg/check_lorentz.py
@@ -1,3038 +1,3084 @@
import itertools,cmath,re,sys,copy
from .helpers import SkipThisVertex,extractAntiSymmetricIndices,def_from_model
from .converter import py2cpp
from .lorentzparser import parse_lorentz
import sympy,string
from string import Template
from sympy import Matrix,Symbol
imap=["t","x","y","z"]
vTemplateT="""\
if(sbarW{iloc}.id()=={id}) {{
return ({res})*({cf});
}}
else {{
return ({resT})*({cf});
}}
"""
vTemplate4="""\
if(id{iloc1}=={id1}) {{
if(id{iloc2}=={id2}) {{
return ({res1})*({cf});
}}
else {{
return ({res2})*({cf});
}}
}}
else {{
if(id{iloc2}=={id2}) {{
return ({res3})*({cf});
}}
else {{
return ({res4})*({cf});
}}
}}
"""
vecTemplate="""\
LorentzPolarizationVector vtemp = {res};
Energy2 p2 = P{iloc}.m2();
Complex fact = -Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
complex<Energy2> mass2 = sqr(mass);
if(mass.real()==ZERO) {{
vtemp =fact*vtemp;
}}
else {{
complex<Energy> dot = P{iloc}*vtemp;
vtemp = fact*(vtemp-dot/mass2*P{iloc});
}}
return VectorWaveFunction(P{iloc},out,vtemp.x(),vtemp.y(),vtemp.z(),vtemp.t());
"""
vecTTemplate="""\
LorentzPolarizationVector vtemp;
if(sbarW{isp}.id()=={id}) {{
vtemp = {res};
}}
else {{
vtemp = {resT};
}}
Energy2 p2 = P{iloc}.m2();
Complex fact = -Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
complex<Energy2> mass2 = sqr(mass);
if(mass.real()==ZERO) {{
vtemp =fact*vtemp;
}}
else {{
complex<Energy> dot = P{iloc}*vtemp;
vtemp = fact*(vtemp-dot/mass2*P{iloc});
}}
return VectorWaveFunction(P{iloc},out,vtemp.x(),vtemp.y(),vtemp.z(),vtemp.t());
"""
sTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
Lorentz{offTypeA}<double> newSpin = fact*({res});
return {offTypeB}(P{iloc},out,newSpin);
"""
RSTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
Lorentz{offTypeA}<double> newSpin = fact*({res});
return {offTypeB}(P{iloc},out,newSpin);
"""
sTTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
if(out->id()=={id}) {{
Lorentz{offTypeA}<double> newSpin = fact*({res});
return {offTypeB}(P{iloc},out,newSpin);
}}
else {{
Lorentz{offTypeA}<double> newSpin = fact*({resT});
return {offTypeB}(P{iloc},out,newSpin);
}}
"""
scaTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
complex<double> output = fact*({res});
return ScalarWaveFunction(P{iloc},out,output);
"""
scaTTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
complex<double> output = sbarW{isp}.id()=={id} ? fact*({res}) : fact*({resT});
}}
return ScalarWaveFunction(P{iloc},out,output);
"""
tenTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
InvEnergy2 OM{iloc} = mass.real()==ZERO ? InvEnergy2(ZERO) : 1./sqr(mass.real());
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
LorentzTensor<double> output = fact*({res});
return TensorWaveFunction(P{iloc},out,output);
"""
tenTTemplate="""\
if(mass.real() < ZERO) mass = (iopt==5) ? ZERO : out->mass();
InvEnergy2 OM{iloc} = mass.real()==ZERO ? InvEnergy2(ZERO) : 1./sqr(mass);
Energy2 p2 = P{iloc}.m2();
Complex fact = Complex(0.,1.)*({cf})*propagator(iopt,p2,out,mass,width);
LorentzTensor<double> output = sbarW{isp}.id()=={id} ? fact*({res}) : fact*({resT});
return TensorWaveFunction(P{iloc},out,output);
"""
# various strings for matrixes
I4 = "Matrix([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]])"
G5 = "Matrix([[-1,0,0,0],[0,-1,0,0],[0,0,1,0],[0,0,0,1]])"
PM = "Matrix([[1,0,0,0],[0,1,0,0],[0,0,0,0],[0,0,0,0]])"
PP = "Matrix([[0,0,0,0],[0,0,0,0],[0,0,1,0],[0,0,0,1]])"
vslash = Template("Matrix([[0,0,${v}tmz,-${v}xmy],[0,0,-${v}xpy,${v}tpz],[${v}tpz,${v}xmy,0,0],[${v}xpy,${v}tmz,0,0]])")
vslashS = Template("${v}tpz=Symbol(\"${v}tpz\")\n${v}tmz=Symbol(\"${v}tmz\")\n${v}xpy=Symbol(\"${v}xpy\")\n${v}xmy=Symbol(\"${v}xmy\")\n")
momCom = Template("${v}t = Symbol(\"${v}t\")\n${v}x = Symbol(\"${v}x\")\n${v}y = Symbol(\"${v}y\")\n${v}z = Symbol(\"${v}z\")\n")
vslashD = Template("complex<${var}> ${v}tpz = ${v}.t()+${v}.z();\n complex<${var}> ${v}tmz = ${v}.t()-${v}.z();\n complex<${var}> ${v}xpy = ${v}.x()+Complex(0.,1.)*${v}.y();\n complex<${var}> ${v}xmy = ${v}.x()-Complex(0.,1.)*${v}.y();")
vslashM = Template("Matrix([[$m,0,${v}tmz,-${v}xmy],[0,$m,-${v}xpy,${v}tpz],[${v}tpz,${v}xmy,$m,0],[${v}xpy,${v}tmz,0,$m]])")
vslashM2 = Template("Matrix([[$m,0,-${v}tmz,${v}xmy],[0,$m,${v}xpy,-${v}tpz],[-${v}tpz,-${v}xmy,$m,0],[-${v}xpy,-${v}tmz,0,$m]])")
vslashMS = Template("${v}tpz=Symbol(\"${v}tpz\")\n${v}tmz=Symbol(\"${v}tmz\")\n${v}xpy=Symbol(\"${v}xpy\")\n${v}xmy=Symbol(\"${v}xmy\")\n${m}=Symbol(\"${m}\")\nO${m}=Symbol(\"O${m}\")\n")
rslash = Template("Matrix([[$m,0,${v}tmz,-${v}xmy],[0,$m,-${v}xpy,${v}tpz],[${v}tpz,${v}xmy,$m,0],[${v}xpy,${v}tmz,0,$m]])*( (ETA(B!,A!)-2/3*O${m}**2*${v}A!*${v}B!)*Matrix([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]) -1/3*R${loc}A*R${loc}B -1/3*O${m}*(${v}B!*R${loc}A-${v}A!*R${loc}B))")
rslash2 = Template("Matrix([[$m,0,-${v}tmz,${v}xmy],[0,$m,${v}xpy,-${v}tpz],[-${v}tpz,-${v}xmy,$m,0],[-${v}xpy,-${v}tmz,0,$m]])*( (ETA(B!,A!)-2/3*O${m}**2*${v}B!*${v}A!)*Matrix([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]) -1/3*R${loc}B*R${loc}A +1/3*O${m}*(${v}A!*R${loc}B-${v}B!*R${loc}A))")
dirac=["Matrix([[0,0,1,0],[0,0,0,1],[1,0,0,0],[0,1,0,0]])","Matrix([[0,0,0,1],[0,0,1,0],[0,-1,0,0],[-1,0,0,0]])",
"Matrix([[0,0,0,complex(0, -1)],[0,0,complex(0, 1),0],[0,complex(0, 1),0,0],[complex(0, -1),0,0,0]])",
"Matrix([[0,0,1,0],[0,0,0,-1],[-1,0,0,0],[0,1,0,0]])"]
CC = "Matrix([[0,1,0,0],[-1,0,0,0],[0,0,0,-1],[0,0,1,0]])"
CD = "Matrix([[0,-1,0,0],[1,0,0,0],[0,0,0,1],[0,0,-1,0]])"
def compare(a,b) :
num=abs(a-b)
den=abs(a+b)
if(den == 0. and 1e-10) :
return True
return num/den<1e-10
def evaluate(x,model,parmsubs):
import cmath
return eval(x,
{'cmath':cmath,
'complexconjugate':model.function_library.complexconjugate},
parmsubs)
def pdgCC(particle) :
pdgid = particle.pdg_code
if(particle.name!=particle.antiname) :
pdgid *= -1
return pdgid
# ordering for EW VVV vertices (ordering not an issue as all same spin)
def VVVordering(vertex) :
pattern = "if((p1->id()==%s&&p2->id()==%s&&p3->id()==%s)"+\
"||(p1->id()==%s&&p2->id()==%s&&p3->id()==%s)||"+\
"(p1->id()==%s&&p2->id()==%s&&p3->id()==%s)) {norm(-norm());}"
ordering = pattern%(vertex.particles[1].pdg_code,
vertex.particles[0].pdg_code,
vertex.particles[2].pdg_code,
vertex.particles[0].pdg_code,
vertex.particles[2].pdg_code,
vertex.particles[1].pdg_code,
vertex.particles[2].pdg_code,
vertex.particles[1].pdg_code,
vertex.particles[0].pdg_code)
return ordering
def tensorCouplings(vertex,value,prefactors,L,lorentztag,pos,all_couplings,order) :
# split the structure into its different terms for analysis
ordering=""
structures = extractStructures(L)
if(lorentztag == 'SST') :
terms=[['P(1003,2)','P(2003,1)'],
['P(1003,1)','P(2003,2)'],
['P(-1,1)','P(-1,2)','Metric(1003,2003)'],
['Metric(1003,2003)']]
signs=[1.,1.,-1.,-1.]
new_couplings=[False]*len(terms)
elif(lorentztag == 'FFT' ) :
terms=[['P(2003,1)','Gamma(1003,2,1)'],
['P(2003,2)','Gamma(1003,2,1)'],
['P(1003,1)','Gamma(2003,2,1)'],
['P(1003,2)','Gamma(2003,2,1)'],
['P(-1,1)','Gamma(-1,2,1)','Metric(1003,2003)'],
['P(-1,2)','Gamma(-1,2,1)','Metric(1003,2003)'],
['Metric(1003,2003)']]
signs=[1.,-1.,1.,-1.,-0.5,0.5,1.]
new_couplings=[False]*3*len(terms)
elif(lorentztag == 'VVT' ) :
terms=[['P(-1,1)','P(-1,2)','Metric(1,2003)','Metric(2,1003)'], # from C term
['P(-1,1)','P(-1,2)','Metric(1,1003)','Metric(2,2003)'], # from C term
['P(-1,1)','P(-1,2)','Metric(1,2)','Metric(1003,2003)'], # from C term
['P(1,2)','P(2,1)','Metric(1003,2003)'], # from D term (sym)
['P(1,2)','P(2003,1)','Metric(2,1003)'], # 1st term
['P(1,2)','P(1003,1)','Metric(2,2003)'], # 1st swap
['P(2,1)','P(2003,2)','Metric(1,1003)'], # 2nd term
['P(2,1)','P(1003,2)','Metric(1,2003)'], # 2nd swap
['P(1003,2)','P(2003,1)','Metric(1,2)'], # 3rd term
['P(1003,1)','P(2003,2)','Metric(1,2)'], # 3rd swap
['Metric(1,2003)','Metric(2,1003)'], # from mass term
['Metric(1,1003)','Metric(2,2003)'], # from mass term
['Metric(1,2)','Metric(1003,2003)'], # from mass term
['P(1,1)','P(2,1)','Metric(1003,2003)'], # gauge terms
['P(1,2)','P(2,2)','Metric(1003,2003)'], # gauge terms
['P(1,1)','P(2,2)','Metric(1003,2003)'], # gauge terms
['P(1003,1)','P(1,1)','Metric(2,2003)'], # gauge terms
['P(1003,2)','P(2,2)','Metric(1,2003)'], # gauge terms
['P(2003,1)','P(1,1)','Metric(2,1003)'], # gauge terms
['P(2003,2)','P(2,2)','Metric(1,1003)'], # gauge terms
]
signs=[1.,1.,-1.,1.,-1.,-1.,-1.,-1.,1.,1.,1.,1.,-1.,1.,1.,0.25,-1.,-1.,-1.,-1.]
new_couplings=[False]*len(terms)
elif(lorentztag == 'FFVT' ) :
terms = [['Gamma(2004,2,1)','Metric(3,1004)'],
['Gamma(1004,2,1)','Metric(3,2004)'],
['Gamma(3,2,1)','Metric(1004,2004)'],
['Gamma(2004,2,-1)','Metric(3,1004)'],
['Gamma(1004,2,-1)','Metric(3,2004)'],
['Gamma(3,2,-1)','Metric(1004,2004)']]
signs=[1.,1.,-0.5,1.,1.,-0.5]
new_couplings=[False]*3*len(terms)
elif(lorentztag == 'VVVT' ) :
# the F(mu nu,rho sigma lambda) terms first
terms = [['P(2004,2)','Metric(1,1004)','Metric(2,3)'],['P(2004,3)','Metric(1,1004)','Metric(2,3)'],
['P(1004,2)','Metric(1,2004)','Metric(2,3)'],['P(1004,3)','Metric(1,2004)','Metric(2,3)'],
['P(2004,3)','Metric(1,3)','Metric(2,1004)'],['P(2004,1)','Metric(1,3)','Metric(2,1004)'],
['P(1004,3)','Metric(1,3)','Metric(2,2004)'],['P(1004,1)','Metric(1,3)','Metric(2,2004)'],
['P(2004,1)','Metric(1,2)','Metric(3,1004)'],['P(2004,2)','Metric(1,2)','Metric(3,1004)'],
['P(1004,1)','Metric(1,2)','Metric(3,2004)'],['P(1004,2)','Metric(1,2)','Metric(3,2004)'],
['P(3,1)','Metric(1,2004)','Metric(2,1004)'],['P(3,2)','Metric(1,2004)','Metric(2,1004)'],
['P(3,1)','Metric(1,1004)','Metric(2,2004)'],['P(3,2)','Metric(1,1004)','Metric(2,2004)'],
['P(3,1)','Metric(1,2)','Metric(1004,2004)'],['P(3,2)','Metric(1,2)','Metric(1004,2004)'],
['P(2,3)','Metric(1,2004)','Metric(3,1004)'],['P(2,1)','Metric(1,2004)','Metric(3,1004)'],
['P(2,3)','Metric(1,1004)','Metric(3,2004)'],['P(2,1)','Metric(1,1004)','Metric(3,2004)'],
['P(2,3)','Metric(1,3)','Metric(1004,2004)'],['P(2,1)','Metric(1,3)','Metric(1004,2004)'],
['P(1,2)','Metric(2,2004)','Metric(3,1004)'],['P(1,3)','Metric(2,2004)','Metric(3,1004)'],
['P(1,2)','Metric(2,1004)','Metric(3,2004)'],['P(1,3)','Metric(2,1004)','Metric(3,2004)'],
['P(1,2)','Metric(2,3)','Metric(1004,2004)'],['P(1,3)','Metric(2,3)','Metric(1004,2004)']]
signs = [1.,-1.,1.,-1.,1.,-1.,1.,-1.,1.,-1.,1.,-1.,
1.,-1.,1.,-1.,-1.,1.,1.,-1.,1.,-1.,-1.,1.,1.,-1.,1.,-1.,-1.,1.]
new_couplings=[False]*len(terms)
l = lambda c: len(pos[c])
if l(8)!=3 :
ordering = VVVordering(vertex)
# unknown
else :
raise Exception('Unknown data type "%s".' % lorentztag)
iterm=0
try :
for term in terms:
for perm in itertools.permutations(term):
label = '*'.join(perm)
for istruct in range(0,len(structures)) :
if label in structures[istruct] :
reminder = structures[istruct].replace(label,'1.',1)
loc=iterm
if(reminder.find("ProjM")>=0) :
reminder=re.sub("\*ProjM\(.*,.\)","",reminder)
loc+=len(terms)
elif(reminder.find("ProjP")>=0) :
reminder=re.sub("\*ProjP\(.*,.\)","",reminder)
loc+=2*len(terms)
structures[istruct] = "Done"
val = eval(reminder, {'cmath':cmath} )*signs[iterm]
if(new_couplings[loc]) :
new_couplings[loc] += val
else :
new_couplings[loc] = val
iterm+=1
except :
SkipThisVertex()
# check we've handled all the terms
for val in structures:
if(val!="Done") :
raise SkipThisVertex()
# special for FFVT
if(lorentztag=="FFVT") :
t_couplings=new_couplings
new_couplings=[False]*9
for i in range(0,9) :
j = i+3*(i/3)
k = i+3+3*(i/3)
if( not t_couplings[j]) :
new_couplings[i] = t_couplings[k]
else :
new_couplings[i] = t_couplings[j]
# set the couplings
for icoup in range(0,len(new_couplings)) :
if(new_couplings[icoup]) :
new_couplings[icoup] = '(%s) * (%s) *(%s)' % (new_couplings[icoup],prefactors,value)
if(len(all_couplings)==0) :
all_couplings=new_couplings
else :
for icoup in range(0,len(new_couplings)) :
if(new_couplings[icoup] and all_couplings[icoup]) :
all_couplings[icoup] = '(%s) + (%s) ' % (new_couplings[icoup],all_couplings[icoup])
elif(new_couplings[icoup]) :
all_couplings[icoup] = new_couplings[icoup]
# return the results
return (ordering,all_couplings)
def processTensorCouplings(lorentztag,vertex,model,parmsubs,all_couplings,order) :
# check for fermion vertices (i.e. has L/R couplings)
fermions = "FF" in lorentztag
# test and process the values of the couplings
tval = [False]*3
value = [False]*3
# loop over the colours
for icolor in range(0,len(all_couplings)) :
lmax = len(all_couplings[icolor])
if(fermions) : lmax /=3
# loop over the different terms
for ix in range(0,lmax) :
test = [False]*3
# normal case
if( not fermions ) :
test[0] = all_couplings[icolor][ix]
else :
# first case vector but no L/R couplings
if( not all_couplings[icolor][lmax+ix] and
not all_couplings[icolor][2*lmax+ix] ) :
test[0] = all_couplings[icolor][ix]
# special for mass terms and massless particles
if(not all_couplings[icolor][ix]) :
code = abs(vertex.particles[order[0]-1].pdg_code)
if(ix==6 and code ==12 or code ==14 or code==16) :
continue
else :
raise SkipThisVertex()
# second case L/R couplings
elif( not all_couplings[icolor][ix] ) :
# L=R, replace with vector
if(all_couplings[icolor][lmax+ix] ==
all_couplings[icolor][2*lmax+ix]) :
test[0] = all_couplings[icolor][lmax+ix]
else :
test[1] = all_couplings[icolor][lmax+ix]
test[2] = all_couplings[icolor][2*lmax+ix]
else :
raise SkipThisVertex()
# special handling of mass terms
# scalar divide by m**2
if((ix==3 and lorentztag=="SST") or
( ix>=10 and ix<=12 and lorentztag=="VVT" )) :
for i in range(0,len(test)) :
if(test[i]) :
test[i] = '(%s)/%s**2' % (test[i],vertex.particles[order[0]-1].mass.value)
# fermions divide by 4*m
elif(ix==6 and lorentztag=="FFT" and
float(vertex.particles[order[0]-1].mass.value) != 0. ) :
for i in range(0,len(test)) :
if(test[i]) :
test[i] = '-(%s)/%s/4' % (test[i],vertex.particles[order[0]-1].mass.value)
# set values on first pass
if(not tval[0] and not tval[1] and not tval[2]) :
value = test
for i in range(0,len(test)) :
if(test[i]) : tval[i] = evaluate(test[i],model,parmsubs)
else :
for i in range(0,len(test)) :
if(not test[i] and not tval[i]) :
continue
if(not test[i] or not tval[i]) :
# special for mass terms and vectors
if(lorentztag=="VVT" and ix >=10 and ix <=12 and
float(vertex.particles[order[0]-1].mass.value) == 0. ) :
continue
# special for vector gauge terms
if(lorentztag=="VVT" and ix>=13) :
continue
raise SkipThisVertex()
tval2 = evaluate(test[i],model,parmsubs)
if(abs(tval[i]-tval2)>1e-6) :
# special for fermion mass term if fermions massless
if(lorentztag=="FFT" and ix ==6 and tval2 == 0. and
float(vertex.particles[order[0]-1].mass.value) == 0. ) :
continue
raise SkipThisVertex()
# simple clean up
for i in range(0,len(value)):
if(value[i]) :
value[i] = value[i].replace("(1.0) * ","").replace(" * (1)","")
# put everything together
coup_left = 0.
coup_right = 0.
coup_norm = 0.
if(lorentztag == "SST" or lorentztag == "VVT" or
lorentztag == "VVVT" or lorentztag == "FFT" ) :
coup_norm = value[0]
if(value[1] or value[2]) :
raise SkipThisVertex()
elif(lorentztag=="FFVT") :
if(not value[1] and not value[2]) :
coup_norm = value[0]
coup_left = "1."
coup_right = "1."
elif(not value[0]) :
coup_norm = "1."
if(value[1] and value[2]) :
coup_left = value[1]
coup_right = value[2]
elif(value[1]) :
coup_left = value[1]
coup_right = "0."
elif(value[2]) :
coup_left = "0."
coup_right = value[2]
else :
raise SkipThisVertex()
else :
raise SkipThisVertex()
else :
raise SkipThisVertex()
# return the answer
return (coup_left,coup_right,coup_norm)
def extractStructures(L) :
structure1 = L.structure.split()
structures =[]
sign=''
for struct in structure1 :
if(struct=='+') :
continue
elif(struct=='-') :
sign='-'
else :
structures.append(sign+struct.strip())
sign=''
return structures
def changeSign(sign1,sign2) :
if((sign1=="+" and sign2=="+") or\
(sign1=="-" and sign2=="-")) :
return "+"
else :
return "-"
def epsilonOrder(eps) :
terms,sign = extractAntiSymmetricIndices(eps,"Epsilon(")
return (sign,"Epsilon(%s,%s,%s,%s)" % (terms[0],terms[1],terms[2],terms[3]))
def VVSEpsilon(couplings,struct) :
if(struct.find("Epsilon")<0) :
return
fact=""
sign="+"
if(struct[-1]==")") :
fact=struct.split("(")[0]
if(fact.find("Epsilon")>=0) :
fact=""
else :
struct=struct.split("(",1)[1][:-1]
if(fact[0]=="-") :
sign="-"
fact=fact[1:]
split = struct.split("*")
# find the epsilon
eps=""
for piece in split :
if(piece.find("Epsilon")>=0) :
eps=piece
split.remove(piece)
break
# and any prefactors
for piece in split :
if(piece.find("P(")<0) :
split.remove(piece)
if(piece[0]=="+" or piece[0]=="-") :
sign=changeSign(sign,piece[0])
piece=piece[1:]
if(fact=="") :
fact=piece
else :
fact = "( %s ) * ( %s )" % (fact , piece)
# now sort out the momenta
for piece in split :
terms=piece.split(",")
terms[0]=terms[0].strip("P(")
terms[1]=terms[1].strip(")")
eps=eps.replace(terms[0],"P%s"%terms[1])
(nsign,eps)=epsilonOrder(eps)
if(nsign>0) : sign=changeSign(sign,"-")
if(fact=="") : fact="1."
if(eps!="Epsilon(1,2,P1,P2)") :
return
if(couplings[6]==0.) :
couplings[6] = "( %s%s )" % (sign,fact)
else :
couplings[6] = "( %s ) + ( %s%s )" % (couplings[6],sign,fact)
def scalarVectorCouplings(value,prefactors,L,lorentztag,all_couplings,order) :
# set up the types of term we are looking for
if(lorentztag=="VVS") :
couplings=[0.,0.,0.,0.,0.,0.,0.]
terms=[['P(-1,%s)' % order[0],
'P(-1,%s)' % order[1],
'Metric(%s,%s)' %(order[0],order[1])],
['P(1,%s)' % order[0],
'P(2,%s)' % order[0]],
['P(1,%s)' % order[0],
'P(2,%s)' % order[1]],
['P(1,%s)' % order[1],
'P(2,%s)' % order[0]],
['P(1,%s)' % order[1],
'P(2,%s)' % order[1]],
['Metric(%s,%s)'%(order[0],order[1])]]
elif(lorentztag=="VVSS") :
couplings=[0.]
terms=[['Metric(%s,%s)' % (order[0],order[1])]]
elif(lorentztag=="VSS"):
couplings=[0.,0.]
terms=[['P(%s,%s)' % (order[0],order[2])],
['P(%s,%s)' % (order[0],order[1])]]
# extract the lorentz structures
structures = extractStructures(L)
# handle the scalar couplings
itype=-1
try :
for term in terms:
itype+=1
for perm in itertools.permutations(term):
label = '*'.join(perm)
for istruct in range(0,len(structures)) :
if label in structures[istruct] :
reminder = structures[istruct].replace(label,'1.',1)
couplings[itype]+=eval(reminder, {'cmath':cmath} )
structures[istruct]='Done'
except :
raise SkipThisVertex()
# special for VVS and epsilon
# handle the pseudoscalar couplings
for struct in structures :
if(struct != "Done" ) :
if(lorentztag=="VVS") :
VVSEpsilon(couplings,struct)
else :
raise SkipThisVertex()
# put it all together
if(len(all_couplings)==0) :
for ic in range(0,len(couplings)) :
if(couplings[ic]!=0.) :
all_couplings.append('(%s) * (%s) * (%s)' % (prefactors,value,couplings[ic]))
else :
all_couplings.append(False)
else :
for ic in range(0,len(couplings)) :
if(couplings[ic]!=0. and all_couplings[ic]) :
all_couplings[ic] = '(%s) * (%s) * (%s) + (%s) ' % (prefactors,value,
couplings[ic],all_couplings[ic])
elif(couplings[ic]!=0) :
all_couplings[ic] = '(%s) * (%s) * (%s) ' % (prefactors,value,couplings[ic])
return all_couplings
def processScalarVectorCouplings(lorentztag,vertex,model,parmsubs,all_couplings,header,order) :
# check the values
tval = [False]*len(all_couplings[0])
value =[False]*len(all_couplings[0])
for icolor in range(0,len(all_couplings)) :
for ix in range(0,len(all_couplings[icolor])) :
if(not value[ix]) :
value[ix] = all_couplings[icolor][ix]
if(value[ix] and not tval[ix]) :
tval[ix] = evaluate(value[ix],model,parmsubs)
elif(value[ix]) :
tval2 = evaluate(all_couplings[icolor][0],model,parmsubs)
if(abs(tval[ix]-tval2)>1e-6) :
raise SkipThisVertex()
append = ""
symbols = set()
coup_norm=0.
if(lorentztag=="VVS") :
if(not value[0] and not value[1] and not value[2] and \
not value[3] and not value[4] and not value[6] and value[5]) :
coup_norm=value[5]
else :
for ix in range(0,len(value)) :
if(value[ix]) :
value[ix], sym = py2cpp(value[ix])
symbols |= sym
else :
value[ix]=0.
lorentztag = 'GeneralVVS'
header="kinematics(true);"
# g_mu,nv piece of coupling
if(value[5]!=0.) :
append +='a00( %s + Complex(( %s )* GeV2/invariant(1,2)));\n' % ( value[0],value[5])
else :
append +='a00( %s );\n' % value[0]
# other couplings
append += 'a11( %s );\n a12( %s );\n a21( %s );\n a22( %s );\n aEp( %s );\n' % \
( value[1],value[2],value[3],value[4],value[6] )
coup_norm="1."
elif(lorentztag=="VVSS") :
coup_norm = value[0]
elif(lorentztag=="VSS") :
if(abs(tval[0]+tval[1])>1e-6) :
for ix in range(0,len(value)) :
if(value[ix]) :
value[ix], sym = py2cpp(value[ix])
symbols |= sym
else :
value[ix]=0.
coup_norm = "1."
append = 'if(p2->id()==%s) { a( %s ); b( %s);}\n else { a( %s ); b( %s);}' \
% (vertex.particles[order[1]-1].pdg_code,
value[0],value[1],value[1],value[0])
else :
coup_norm = value[1]
append = 'if(p2->id()!=%s){norm(-norm());}' \
% vertex.particles[order[1]-1].pdg_code
# return the answer
return (coup_norm,append,lorentztag,header,symbols)
def getIndices(term) :
if(term[0:2]=="P(") :
indices = term.strip(")").strip("P(").split(",")
mom = int(indices[1])
index = int(indices[0])
return (True,mom,index)
else :
return (False,0,0)
def lorentzScalar(vertex,L) :
dotProduct = """(invariant( i[{i1}], i[{i2}] )/GeV2)"""
structures=L.structure.split()
output="("
for struct in structures:
if(struct=="+" or struct=="-") :
output+=struct
continue
structure = struct.split("*")
worked = False
mom=-1
newTerm=""
while True :
term = structure[-1]
structure.pop()
(momentum,mom,index) = getIndices(term)
if( not momentum) : break
# look for the matching momenta
for term in structure :
(momentum,mom2,index2) = getIndices(term)
if(index2==index) :
structure.remove(term)
dot = dotProduct.format(i1=mom-1,i2=mom2-1)
if(newTerm=="") :
newTerm = dot
else :
newTerm = " ( %s) * ( %s ) " % (newTerm,dot)
if(len(structure)==0) :
worked = True
break
if(not worked) :
return False
else :
output+=newTerm
output+=")"
return output
kinematicsline = """\
long id [3]={{{id1},{id2},{id3}}};
long id2[3]={{p1->id(),p2->id(),p3->id()}};
unsigned int i[3];
for(unsigned int ix=0;ix<3;++ix) {{
for(unsigned int iy=0;iy<3;++iy) {{
if(id[ix]==id2[iy]) {{
i[ix] = iy;
id2[iy]=0;
break;
}}
}}
}}
double hw_kine1 = {kine};
"""
kinematicsline2 = """\
long id [4]={{{id1},{id2},{id3},{id4}}};
long id2[4]={{p1->id(),p2->id(),p3->id(),p4->id()}};
unsigned int i[4];
for(unsigned int ix=0;ix<4;++ix) {{
for(unsigned int iy=0;iy<4;++iy) {{
if(id[ix]==id2[iy]) {{
i[ix] = iy;
id2[iy]=0;
break;
}}
}}
}}
double hw_kine1 = {kine};
"""
kinematicsline3 ="""\
double hw_kine{i} = {kine};
"""
def scalarCouplings(vertex,value,prefactors,L,lorentztag,
all_couplings,prepend,header) :
try :
val = int(L.structure)
except :
output = lorentzScalar(vertex,L)
if( not output ) :
raise SkipThisVertex()
else :
if(prepend=="") :
if(lorentztag=="SSS") :
# order doesn't matter here, all same spin
prepend = kinematicsline.format(id1=vertex.particles[0].pdg_code,
id2=vertex.particles[1].pdg_code,
id3=vertex.particles[2].pdg_code,
kine=output)
else :
# order doesn't matter here, all same spin
prepend = kinematicsline2.format(id1=vertex.particles[0].pdg_code,
id2=vertex.particles[1].pdg_code,
id3=vertex.particles[2].pdg_code,
id4=vertex.particles[3].pdg_code,
kine=output)
value = "(%s) *(hw_kine1)" % value
else :
osplit=prepend.split("\n")
i=-1
while osplit[i]=="":
i=i-1
ikin=int(osplit[i].split("=")[0].replace("double hw_kine",""))+1
prepend +=kinematicsline3.format(kine=output,i=ikin)
value = "(%s) *(hw_kine%s)" % (value,ikin)
header="kinematics(true);"
if(len(all_couplings)==0) :
all_couplings.append('(%s) * (%s)' % (prefactors,value))
else :
all_couplings[0] = '(%s) * (%s) + (%s)' % (prefactors,value,all_couplings[0])
return (prepend, header,all_couplings)
def processScalarCouplings(model,parmsubs,all_couplings) :
tval = False
value = False
for icolor in range(0,len(all_couplings)) :
if(len(all_couplings[icolor])!=1) :
raise SkipThisVertex()
if(not value) :
value = all_couplings[icolor][0]
m = re.findall('hw_kine[0-9]*', all_couplings[icolor][0])
if m:
for kine in m:
# bizarre number for checks, must be a better option
parmsubs[kine] = 987654321.
if(not tval) :
tval = evaluate(value,model,parmsubs)
else :
tval2 = evaluate(all_couplings[icolor][0],model,parmsubs)
if(abs(tval[i]-tval2)>1e-6) :
raise SkipThisVertex()
# cleanup and return the answer
return value.replace("(1.0) * ","").replace(" * (1)","")
def vectorCouplings(vertex,value,prefactors,L,lorentztag,pos,
all_couplings,append,qcd,order) :
structures=extractStructures(L)
terms=[]
signs=[]
if(lorentztag=="VVV") :
terms=[['P(%s,%s)' % (order[2],order[0]),'Metric(%s,%s)' % (order[0],order[1])],
['P(%s,%s)' % (order[2],order[1]),'Metric(%s,%s)' % (order[0],order[1])],
['P(%s,%s)' % (order[1],order[0]),'Metric(%s,%s)' % (order[0],order[2])],
['P(%s,%s)' % (order[1],order[2]),'Metric(%s,%s)' % (order[0],order[2])],
['P(%s,%s)' % (order[0],order[1]),'Metric(%s,%s)' % (order[1],order[2])],
['P(%s,%s)' % (order[0],order[2]),'Metric(%s,%s)' % (order[1],order[2])]]
signs=[1.,-1.,-1.,1.,1.,-1.]
elif(lorentztag=="VVVV") :
terms=[['Metric(%s,%s)' % (order[0],order[3]),'Metric(%s,%s)' % (order[1],order[2])],
['Metric(%s,%s)' % (order[0],order[2]),'Metric(%s,%s)' % (order[1],order[3])],
['Metric(%s,%s)' % (order[0],order[1]),'Metric(%s,%s)' % (order[2],order[3])]]
signs=[1.,1.,1.]
elif(lorentztag=="VVVS") :
terms=[['P(%s,%s)' % (order[2],order[0]),'Metric(%s,%s)' % (order[0],order[1])],
['P(%s,%s)' % (order[2],order[1]),'Metric(%s,%s)' % (order[0],order[1])],
['P(%s,%s)' % (order[1],order[0]),'Metric(%s,%s)' % (order[0],order[2])],
['P(%s,%s)' % (order[1],order[2]),'Metric(%s,%s)' % (order[0],order[2])],
['P(%s,%s)' % (order[0],order[1]),'Metric(%s,%s)' % (order[1],order[2])],
['P(%s,%s)' % (order[0],order[2]),'Metric(%s,%s)' % (order[1],order[2])],
['Epsilon(1,2,3,-1)','P(-1,1)'],['Epsilon(1,2,3,-1)','P(-1,2)'],
['Epsilon(1,2,3,-1)','P(-1,3)']]
signs=[1.,-1.,-1.,1.,1.,-1.,1.,1.,1.]
# extract the couplings
new_couplings = [False]*len(terms)
iterm=0
try :
for term in terms:
for perm in itertools.permutations(term):
label = '*'.join(perm)
for istruct in range(0,len(structures)) :
if label in structures[istruct] :
reminder = structures[istruct].replace(label,'1.',1)
structures[istruct] = "Done"
val = eval(reminder, {'cmath':cmath} )*signs[iterm]
if(new_couplings[iterm]) :
new_couplings[iterm] += val
else :
new_couplings[iterm] = val
iterm += 1
except :
raise SkipThisVertex()
# check we've handled all the terms
for val in structures:
if(val!="Done") :
raise SkipThisVertex()
# set the couplings
for icoup in range(0,len(new_couplings)) :
if(new_couplings[icoup]) :
new_couplings[icoup] = '(%s) * (%s) *(%s)' % (new_couplings[icoup],prefactors,value)
if(len(all_couplings)==0) :
all_couplings=new_couplings
else :
for icoup in range(0,len(new_couplings)) :
if(new_couplings[icoup] and all_couplings[icoup]) :
all_couplings[icoup] = '(%s) * (%s) *(%s) + (%s) ' % (new_couplings[icoup],prefactors,value,all_couplings[icoup])
elif(new_couplings[icoup]) :
all_couplings[icoup] = new_couplings[icoup]
# ordering for VVV type vertices
if(len(pos[8]) != 3 and (lorentztag=="VVV" or lorentztag=="VVVS")) :
append = VVVordering(vertex)
return all_couplings,append
def processVectorCouplings(lorentztag,vertex,model,parmsubs,all_couplings,append,header) :
value = False
tval = False
if(lorentztag=="VVV") :
for icolor in range(0,len(all_couplings)) :
# loop over the different terms
for ix in range(0,len(all_couplings[icolor])) :
if(not value) :
value = all_couplings[icolor][ix]
tval = evaluate(value,model,parmsubs)
else :
tval2 = evaluate(all_couplings[icolor][ix],model,parmsubs)
if(abs(tval-tval2)>1e-6) :
raise SkipThisVertex()
elif(lorentztag=="VVVV") :
order=[]
colours = vertex.color
if(len(colours)==1) :
tval=[]
for i in range(0,3) :
tval.append(evaluate(all_couplings[0][i],model,parmsubs))
if(compare(tval[2],-2.*tval[1]) and
compare(tval[2],-2.*tval[0]) ) :
order=[0,1,2,3]
value = "0.5*(%s)" % all_couplings[0][2]
elif(compare(tval[1],-2.*tval[2]) and
compare(tval[1],-2.*tval[0]) ) :
order=[0,2,1,3]
value = "0.5*(%s)" % all_couplings[0][1]
elif(compare(tval[0],-2.*tval[2]) and
compare(tval[0],-2.*tval[1]) ) :
order=[0,3,1,2]
value = "0.5*(%s)" % all_couplings[0][0]
else:
raise SkipThisVertex()
pattern = \
"bool done[4]={false,false,false,false};\n" + \
" tcPDPtr part[4]={p1,p2,p3,p4};\n" + \
" unsigned int iorder[4]={0,0,0,0};\n" + \
" for(unsigned int ix=0;ix<4;++ix) {\n" + \
" if(!done[0] && part[ix]->id()==%s) {done[0]=true; iorder[%s] = ix; continue;}\n" + \
" if(!done[1] && part[ix]->id()==%s) {done[1]=true; iorder[%s] = ix; continue;}\n" + \
" if(!done[2] && part[ix]->id()==%s) {done[2]=true; iorder[%s] = ix; continue;}\n" + \
" if(!done[3] && part[ix]->id()==%s) {done[3]=true; iorder[%s] = ix; continue;}\n" + \
" }\n" + \
" setType(2);\n" + \
" setOrder(iorder[0],iorder[1],iorder[2],iorder[3]);"
# order doesn't matter here same spin
append = pattern % ( vertex.particles[0].pdg_code,order[0],
vertex.particles[1].pdg_code,order[1],
vertex.particles[2].pdg_code,order[2],
vertex.particles[3].pdg_code,order[3] )
else :
for icolor in range(0,len(all_couplings)) :
col=colours[icolor].split("*")
if(len(col)==2 and "f(" in col[0] and "f(" in col[1]) :
sign = 1
for i in range(0,2) :
col[i],stemp = extractAntiSymmetricIndices(col[i],"f(")
for ix in range(0,len(col[i])): col[i][ix]=int(col[i][ix])
sign *=stemp
if(col[0][0]>col[1][0]) : col[0],col[1] = col[1],col[0]
# first flow
if(col[0][0]==1 and col[0][1]==2 and col[1][0] ==3 and col[1][1] == 4) :
if(all_couplings[icolor][2] or not all_couplings[icolor][0] or
not all_couplings[icolor][1]) :
raise SkipThisVertex()
if(not value) :
value = all_couplings[icolor][1]
tval = evaluate(value,model,parmsubs)
tval2 = -evaluate(all_couplings[icolor][0],model,parmsubs)
tval3 = evaluate(all_couplings[icolor][1],model,parmsubs)
elif(col[0][0]==1 and col[0][1]==3 and col[1][0] ==2 and col[1][1] == 4) :
if(all_couplings[icolor][1] or not all_couplings[icolor][0] or
not all_couplings[icolor][2]) :
raise SkipThisVertex()
if(not value) :
value = all_couplings[icolor][2]
tval = evaluate(value,model,parmsubs)
tval2 = -evaluate(all_couplings[icolor][0],model,parmsubs)
tval3 = evaluate(all_couplings[icolor][2],model,parmsubs)
elif(col[0][0]==1 and col[0][1]==4 and col[1][0] ==2 and col[1][1] == 3) :
if(all_couplings[icolor][0] or not all_couplings[icolor][1] or
not all_couplings[icolor][2]) :
raise SkipThisVertex()
if(not value) :
value = all_couplings[icolor][2]
tval = evaluate(value,model,parmsubs)
tval2 = -evaluate(all_couplings[icolor][1],model,parmsubs)
tval3 = evaluate(all_couplings[icolor][2],model,parmsubs)
else :
raise SkipThisVertex()
if(abs(tval-tval2)>1e-6 or abs(tval-tval3)>1e-6 ) :
raise SkipThisVertex()
append = 'setType(1);\nsetOrder(0,1,2,3);'
else :
print 'unknown colour structure for VVVV vertex'
raise SkipThisVertex()
elif(lorentztag=="VVVS") :
try :
# two distinct cases 0-5 = , 6-8=
if(all_couplings[0][0]) :
imin=0
imax=6
header="scalar(true);"
else :
imin=6
imax=9
header="scalar(false);"
for icolor in range(0,len(all_couplings)) :
# loop over the different terms
for ix in range(imin,imax) :
if(not value) :
value = all_couplings[icolor][ix]
tval = evaluate(value,model,parmsubs)
else :
tval2 = evaluate(value,model,parmsubs)
if(abs(tval-tval2)>1e-6) :
raise SkipThisVertex()
except :
SkipThisVertex()
# cleanup and return the answer
value = value.replace("(1.0) * ","").replace(" * (1)","")
return (value,append,header)
def fermionCouplings(value,prefactors,L,all_couplings,order) :
new_couplings=[False,False]
try :
new_couplings[0],new_couplings[1] = parse_lorentz(L.structure)
except :
raise SkipThisVertex()
for i in range(0,2) :
if new_couplings[i]:
new_couplings[i] = '(%s) * (%s) * (%s)' % (prefactors,new_couplings[i],value)
if(len(all_couplings)==0) :
all_couplings=new_couplings
else :
for i in range(0,len(new_couplings)) :
if(new_couplings[i] and all_couplings[i]) :
all_couplings[i] = '(%s) + (%s) ' % (new_couplings[i],all_couplings[i])
elif(new_couplings[i]) :
all_couplings[i] = new_couplings[i]
return all_couplings
def processFermionCouplings(lorentztag,vertex,model,parmsubs,all_couplings,order) :
leftcontent = all_couplings[0][0] if all_couplings[0][0] else "0."
rightcontent = all_couplings[0][1] if all_couplings[0][1] else "0."
tval=[evaluate( leftcontent,model,parmsubs),
evaluate(rightcontent,model,parmsubs)]
for icolor in range(0,len(all_couplings)) :
# loop over the different terms
for ix in range(0,len(all_couplings[icolor])) :
tval2 = evaluate(all_couplings[icolor][ix],model,parmsubs) if all_couplings[icolor][ix] else 0.
if(abs(tval[ix]-tval2)>1e-6) :
raise SkipThisVertex()
normcontent = "1."
append=""
if lorentztag == 'FFV':
append = ('if(p1->id()!=%s) {Complex ltemp=left(), rtemp=right(); left(-rtemp); right(-ltemp);}'
% vertex.particles[order[0]-1].pdg_code)
return normcontent,leftcontent,rightcontent,append
def RSCouplings(value,prefactors,L,all_couplings,order) :
raise SkipThisVertex()
class LorentzIndex :
""" A simple classs to store a Lorentz index """
type=""
value=0
def __repr__(self):
return "%s%s" % (self.type,self.value)
def __init__(self,val) :
if(isinstance(val,int)) :
if(val<0) :
self.type="D"
self.value = val
elif(val>0 and val/1000==0) :
self.type="E"
self.value = val
elif(val>0 and val/1000==1) :
self.type="T1"
self.value = val%1000
elif(val>0 and val/1000==2) :
self.type="T2"
self.value = val%1000
else :
print "INDEX",val
quit()
else :
print 'unknown value in lorentz index',val
quit()
def __eq__(self,other):
return ( (self.type, self.value)
== (other.type, other.value) )
def __hash__(self) :
return hash((self.type,self.value))
# def indexEqual(i1,i2):
# return ( (i1.type, i1.value) == (i2.type, i2.value) )
class LorentzStructure:
"""A simple class to store a Lorentz structures"""
name=""
value=0
lorentz=[]
spin=[]
def __repr__(self):
output = self.name
if((self.name=="P" or self.name=="Tensor") and self.value!=0) :
output += "%s" % self.value
if(self.name=="int" or self.name=="sign") :
output += "=%s" % self.value
elif(len(self.spin)==0) :
output += "("
for val in self.lorentz :
output += "%s," % val
output=output.rstrip(",")
output+=")"
elif(len(self.lorentz)==0) :
output += "("
for val in self.spin :
output += "%s," % val
output=output.rstrip(",")
output+=")"
else :
output += "("
for val in self.lorentz :
output += "%s," % val
for val in self.spin :
output += "%s," % val
output=output.rstrip(",")
output+=")"
return output
def LorentzCompare(a,b) :
if(a.name=="int" and b.name=="int") :
return int(b.value-a.value)
elif(a.name=="int") :
return -1
elif(b.name=="int") :
return 1
elif(len(a.spin)==0) :
if(len(b.spin)==0) :
return len(b.lorentz)-len(a.lorentz)
else :
return -1
elif(len(b.spin)==0) :
return 1
else :
if(len(a.spin)==0 or len(b.spin)==0) :
print 'index problem',a.name,b.name
print a.spin,b.spin
quit()
if(a.spin[0]>0 or b.spin[1]>0 ) : return -1
if(a.spin[1]>0 or b.spin[0]>0 ) : return 1
if(a.spin[1]==b.spin[0]) : return -1
if(b.spin[1]==a.spin[0]) : return 1
return 0
def extractIndices(struct) :
if(struct.find("(")<0) : return []
temp=struct.split("(")[1].split(")")[0].split(",")
output=[]
for val in temp :
output.append(int(val))
return output
def parse_structure(structure) :
output=[]
found = True
while(found) :
found = False
# signs between terms
if(structure=="+" or structure=="-") :
output.append(LorentzStructure())
output[0].name="sign"
output[0].value=structure[0]+"1."
output[0].value=float(output[0].value)
return output
# simple numeric pre/post factors
elif((structure[0]=="-" or structure[0]=="+") and
structure[-1]==")" and structure[1]=="(") :
output.append(LorentzStructure())
output[-1].name="int"
output[-1].value=structure[0]+"1."
output[-1].value=float(output[-1].value)
structure=structure[2:-1]
found=True
elif(structure[0]=="(") :
temp=structure.rsplit(")",1)
structure=temp[0][1:]
output.append(LorentzStructure())
output[-1].name="int"
output[-1].value="1."+temp[1]
output[-1].value=float(eval(output[-1].value))
found=True
elif(structure[0:2]=="-(") :
temp=structure.rsplit(")",1)
structure=temp[0][2:]
output.append(LorentzStructure())
output[-1].name="int"
output[-1].value="-1."+temp[1]
output[-1].value=float(eval(output[-1].value))
found=True
# special handling for powers , assume only 2
power = False
if("**" in structure ) :
power = True
structure = structure.replace("**","^")
structures = structure.split("*")
if(power) :
for j in range(0,len(structures)):
if(structures[j].find("^")>=0) :
temp = structures[j].split("^")
structures[j] = temp[0]
for i in range(0,int(temp[1])-1) :
structures.append(temp[0])
# split up the structure
for struct in structures:
ind = extractIndices(struct)
# different types of object
# object with only spin indices
if(struct.find("Identity")==0 or
struct.find("Proj")==0 or
struct.find("Gamma5")==0) :
print 'found proj'
output.append(LorentzStructure())
output[-1].spin=ind
output[-1].name=struct.split("(")[0]
output[-1].value=0
if(len(struct.replace("%s(%s,%s)" % (output[-1].name,ind[0],ind[1]),""))!=0) :
print "Problem handling %s structure " % output[-1].name
raise SkipThisVertex()
# objects with 2 lorentz indices
elif(struct.find("Metric")==0) :
output.append(LorentzStructure())
output[-1].lorentz=[LorentzIndex(ind[0]),LorentzIndex(ind[1])]
output[-1].name=struct.split("(")[0]
output[-1].value=0
if(len(struct.replace("%s(%s,%s)" % (output[-1].name,ind[0],ind[1]),""))!=0) :
print "Problem handling %s structure " % output[-1].name
raise SkipThisVertex()
elif(struct.find("P(")==0) :
output.append(LorentzStructure())
output[-1].lorentz=[LorentzIndex(ind[0])]
output[-1].name=struct.split("(")[0]
output[-1].value=ind[1]
if(len(struct.replace("%s(%s,%s)" % (output[-1].name,ind[0],ind[1]),""))!=0) :
print "Problem handling %s structure " % output[-1].name
raise SkipThisVertex()
# 1 lorentz and 1 spin index
elif(struct.find("Gamma")==0) :
output.append(LorentzStructure())
output[-1].lorentz=[LorentzIndex(ind[0])]
output[-1].spin=[ind[1],ind[2]]
output[-1].name=struct.split("(")[0]
output[-1].value=1
if(len(struct.replace("%s(%s,%s,%s)" % (output[-1].name,ind[0],ind[1],ind[2]),""))!=0) :
print "problem parsing gamma matrix",struct
raise SkipThisVertex()
# objects with 4 lorentz indices
elif(struct.find("Epsilon")==0) :
print 'eps'
quit()
output.append(LorentzStructure())
output[-1].lorentz=ind
output[-1].name=struct.split("(")[0]
output[-1].value=1.
if(len(struct.replace("%s(%s,%s,%s,%s)" % (output[-1].name,ind[0],ind[1],ind[2],ind[3]),""))!=0) :
print "problem D"
quit()
# scalars
else :
try :
output.append(LorentzStructure())
output[-1].value=float(struct)
output[-1].name="int"
except :
if(struct.find("complex")==0) :
vals = struct[0:-1].replace("complex(","").split(",")
output[-1].value=complex(float(vals[0]),float(vals[1]))
output[-1].name="int"
else :
print 'scalar problem',struct
print complex(struct)
quit()
# now do the sorting
if(len(output)==1) : return output
output = sorted(output,cmp=LorentzCompare)
print output
return output
def contract(parsed) :
print "!!!!!!!!!!!!!!!!!!!!!!!!! IN CONTRACT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
print parsed
for j in range(0,len(parsed)) :
if(parsed[j]=="") : continue
if(parsed[j].name=="P") :
# simplest case
if(parsed[j].lorentz[0].type=="E" or
parsed[j].lorentz[0].type=="P") :
newIndex = LorentzIndex(parsed[j].value)
newIndex.type="P"
parsed[j].name="Metric"
parsed[j].lorentz.append(newIndex)
parsed[j].lorentz = sorted(parsed[j].lorentz,cmp=indSort)
continue
ll=1
found=False
for k in range(0,len(parsed)) :
if(j==k or parsed[k]=="" ) : continue
for i in range(0,len(parsed[k].lorentz)) :
if(parsed[k].lorentz[i] == parsed[j].lorentz[0]) :
parsed[k].lorentz[i].type="P"
parsed[k].lorentz[i].value = parsed[j].value
if(parsed[k].name=="P") :
parsed[k].lorentz.append(LorentzIndex(parsed[k].value))
parsed[k].lorentz[1].type="P"
parsed[k].name="Metric"
parsed[k].value = 0
found=True
break
if(found) :
parsed[j]=""
break
return [x for x in parsed if x != ""]
def computeUnit(dimension) :
if(isinstance(dimension,int)) :
dtemp = dimension
else :
dtemp=dimension[1]+dimension[2]
if(dtemp==0) :
unit="double"
elif(dtemp==1) :
unit="Energy"
elif(dtemp==-1) :
unit="InvEnergy"
elif(dtemp>0) :
unit="Energy%s" % (dtemp)
elif(dtemp<0) :
unit="InvEnergy%s" % (dtemp)
return unit
def computeUnit2(dimension,vDim) :
# first correct for any coupling power in vertex
totalDim = int(dimension[0])+dimension[2]+vDim-4
output=""
if(totalDim!=0) :
if(totalDim>0) :
if(totalDim==1) :
output = "1./GeV"
elif(totalDim==2) :
output = "1./GeV2"
else :
output="1."
for i in range(0,totalDim) :
output +="/GeV"
else :
if(totalDim==-1) :
output = "GeV"
elif(totalDim==-2) :
output = "GeV2"
else :
output="1."
for i in range(0,-totalDim) :
output +="*GeV"
expr=""
# now remove the remaining dimensionality
removal=dimension[1]-int(dimension[0])-vDim+4
if(removal!=0) :
if(removal>0) :
if(removal==1) :
expr = "UnitRemoval::InvE"
else :
expr = "UnitRemoval::InvE%s" % removal
else :
if(removal==-1) :
expr = "UnitRemoval::E"
else :
expr = "UnitRemoval::E%s" % (-removal)
if(output=="") : return expr
elif(expr=="") : return output
else : return "%s*%s" %(output,expr)
# order the indices of a dot product
def indSort(a,b) :
- print 'in sort',a,b
if(not isinstance(a,LorentzIndex) or
not isinstance(b,LorentzIndex)) :
quit()
if(a.type==b.type) :
i1=a.value
i2=b.value
if(i1>i2) :
return 1
elif(i1<i2) :
return -1
else :
return 0
else :
if(a.type=="E") :
return 1
else :
return -1
def finishParsing(parsed,dimension,lorentztag,iloc,defns) :
output=1.
# replace signs
if(len(parsed)==1 and parsed[0].name=="sign") :
if(parsed[0].value>0) :
output="+"
else :
output="-"
parsed=[]
return (output,parsed,dimension)
# replace integers (really lorentz scalars)
print parsed
for j in range(0,len(parsed)) :
if(parsed[j]!="" and parsed[j].name=="int") :
print output,parsed[j]
output *= parsed[j].value
parsed[j]=""
# bracket this for safety
if(output!="") : output = "(%s)" % output
# special for tensor indices
if("T" in lorentztag) :
for j in range(0,len(parsed)) :
if(parsed[j]=="") :continue
print "!!!!!!!!!",parsed[j]
# check for tensor index
found=False
for li in parsed[j].lorentz :
if(li.type[0]=="T") :
index = li
found=True
break
if(not found) : continue
# workout the other index for the tensor
index2 = LorentzIndex(li.value)
if(index.type=="T1") :
index2.type="T2"
else :
index2.type="T1"
print index,index2
# special is tensor contracted with itself
if(parsed[j].name=="Metric" and index2 == parsed[j].lorentz[1]) :
parsed[j].name = "Tensor"
parsed[j].value = index.value
parsed[j].lorentz = []
if(iloc!=index.value) :
name= "traceT%s" % parsed[j].value
if( name in defns ) :
output += "*(%s)" % defns[name][0]
else :
defns[name] = [name,"Complex %s = T%s.trace();" % (name,parsed[j].value)]
output += "*(%s)" % defns[name][0]
parsed[j]=""
continue
# otherwise search for the match
for k in range(j+1,len(parsed)) :
print parsed[k]
found = False
for li in parsed[k].lorentz :
if(li == index2) :
found=True
break
if(not found) : continue
if(parsed[j].name=="P") :
newIndex1 = LorentzIndex(parsed[j].value)
newIndex1.type="P"
elif(parsed[j].name=="Metric") :
for li in parsed[j].lorentz :
if(li != index) :
newIndex1=li
break
else :
print 'unknown type'
print parsed[j]
quit()
if(parsed[k].name=="P") :
newIndex2 = LorentzIndex(parsed[k].value)
newIndex2.type="P"
elif(parsed[k].name=="Metric") :
for li in parsed[k].lorentz :
if(li != index) :
newIndex2=li
break
else :
print 'unknown type'
print parsed[j]
quit()
parsed[j].name = "Tensor"
parsed[j].value= int(index.value)
parsed[j].lorentz= [newIndex1,newIndex2]
parsed[k]=""
# main handling of lorentz structures
for j in range(0,len(parsed)) :
if(parsed[j]=="") : continue
if(parsed[j].name=="Metric") :
- print 'before sort',parsed[j].lorentz[0],parsed[j].lorentz[1]
(ind1,ind2) = sorted((parsed[j].lorentz[0],parsed[j].lorentz[1]),cmp=indSort)
- print "after sort ",ind1,ind2
# this product already dealt with ?
if((ind1,ind2) in defns) :
output += "*(%s)" % defns[(ind1,ind2)][0]
parsed[j]=""
if(ind1.type=="P") : dimension[2] +=1
if(ind2.type=="P") : dimension[2] +=1
continue
# handle the product
name = "dot%s" % (len(defns)+1)
if(ind1.type=="P") :
# dot product of two momenta
if(ind2.type=="P") :
dimension[2] +=2
defns[(ind1,ind2)] = [name,"Energy2 %s = %s*%s;" % (name,ind1,ind2)]
output += "*(%s)" % name
parsed[j]=""
elif(ind2.type=="E") :
if(ind2.value!=iloc) :
dimension[2] += 1
defns[(ind1,ind2)] = [name,"complex<Energy> %s = %s*%s;" % (name,ind1,ind2)]
output += "*(%s)" % name
parsed[j]=""
#
# if(int(ind2[1])==iloc) :
# output += "*(%s)" % ind1
# else :
#
#
elif(ind1.type=="E") :
if(ind2.type!="E") :
print "EE problem",ind1,ind2
quit()
elif(ind1.value!=iloc and ind2.value!=iloc) :
defns[(ind1,ind2)] = [name,"complex<double> %s = %s*%s;" % (name,ind1,ind2)]
output += "*(%s)" % name
parsed[j]=""
# if(int(ind1[1])==iloc) :
# output += "*(%s)" % ind2
# elif(int(ind2[1])==iloc) :
# output += "*(%s)" % ind1
# else :
#
#
# elif(parsed[j].name=="Epsilon") :
# if(not eps) : eps = True
# offLoc = -1
# indices=[]
# dTemp=0
# for ix in range(0,len(parsed[j].lorentz)) :
# if(isinstance(parsed[j].lorentz[ix],int)) :
# offLoc = ix
# break
# elif(parsed[j].lorentz[ix][0]=="E" and int(parsed[j].lorentz[ix][1])==iloc ) :
# offLoc = ix
# break
# for ix in range(0,len(parsed[j].lorentz)) :
# if(isinstance(parsed[j].lorentz[ix],basestring) and
# parsed[j].lorentz[ix][0]=="P") : dTemp+=1
# if((offLoc<0 and ix != 0) or
# (offLoc>=0 and offLoc!=ix) ) :
# indices.append(parsed[j].lorentz[ix])
# dimension[2] += dTemp
# if(offLoc<0) :
# iTemp = (parsed[j].lorentz[0],parsed[j].lorentz[1],
# parsed[j].lorentz[2],parsed[j].lorentz[3])
# if(iTemp in defns) :
# output += "*(%s)" % defns[iTemp][0]
# parsed[j]=""
# else :
# name = "dot%s" % (len(defns)+1)
# unit = computeUnit(dTemp)
# defns[iTemp] = [name,"complex<%s> %s =-%s*epsilon(%s,%s,%s);" % (unit,name,parsed[j].lorentz[0],
# indices[0],indices[1],indices[2]) ]
# output += "*(%s)" % name
# else :
# iTemp = (indices[0],indices[1],indices[2])
# sign = ""
# if(offLoc%2!=0) : sign="-"
# print iTemp
# if(iTemp in defns) :
# output += "*(%s%s)" % (sign,defns[iTemp][0])
# parsed[j]=""
# else :
# name = "vec%s" % (len(defns)+1)
# output += "*(%s%s)" % (sign,name)
# unit = computeUnit(dTemp)
# defns[iTemp] = [name,"LorentzVector<complex<%s> > %s =-epsilon(%s,%s,%s);" % (unit,name,
# indices[0],indices[1],indices[2]) ]
elif(parsed[j].name=="Tensor") :
# not an exteral tensor
if(parsed[j].value!=iloc) :
# now check the lorentz indices
con=[]
uncon=[]
dtemp=0
for li in parsed[j].lorentz :
if(li.type=="P") :
con.append(li)
dtemp+=1
elif(li.type=="E") :
if(li.value!=iloc) :
con.append(li)
else :
uncon.append(li)
else :
print 'need to handle ',li,'in tensor',parsed[j]
print li
quit()
if(len(con)==2) :
iTemp = ("T%s%s%s"% (parsed[j].value,con[0],con[1]))
dimension[2]+=dtemp
if(iTemp in defns) :
output += "*(%s)" % defns[iTemp][0]
else :
unit=computeUnit(dtemp)
name = "dot%s" % (len(defns)+1)
defns[iTemp] = [name,"complex<%s> %s = T%s.preDot(%s)*%s;" % (unit,name,parsed[j].value,con[0],con[1])]
output += "*(%s)" % name
- parsed[j]=""
+ parsed[j]=""
elif(len(con)==1 and len(uncon)==1) :
print 'uncon'
else :
print "can't happen"
quit()
-
- print 'tensor on-shell'
else :
- print 'off-shell tensor'
dtemp=0
for li in parsed[j].lorentz :
if(li.type=="P") : dtemp+=1
dimension[2]+=dtemp
elif(parsed[j].name.find("Proj")>=0 or
parsed[j].name.find("Gamma")>=0) :
- print 'skip gamma'
continue
else :
print 'not handled',parsed[j]
quit()
# remove leading *
if(output!="" and output[0]=="*") : output = output[1:]
# remove any (now) empty elements
parsed = [x for x in parsed if x != ""]
return (output,parsed,dimension)
def finalContractions(output,parsed,dimension,lorentztag,iloc,defns) :
if(len(parsed)==0) :
return (output,dimension)
elif(len(parsed)!=1) :
- print "summation can't be handled",parsed
- raise skipThisVertex()
+ print "summation can't be handled",parsed,iloc,output
+ quit()
+ raise SkipThisVertex()
if(parsed[0].name=="Tensor") :
- tensor = tensorPropagator(parsed[0],defns)
- if(output=="") : output="1."
- output = [output,tensor,()]
+ # contracted with off-shell vector
+ if(parsed[0].value!=iloc) :
+ found = False
+ for ll in parsed[0].lorentz :
+ if(ll.type=="E" and ll.value==iloc) :
+ found = True
+ else :
+ lo=ll
+ if(found) :
+ unit="double"
+ if(lo.type=="P") :
+ dimension[2]+=1
+ unit="Energy"
+ if(lo==parsed[0].lorentz[0]) :
+ name="T%s%sF" % (parsed[0].value,lo)
+ defns[name] = [name,"LorentzVector<complex<%s> > %s = T%s.preDot(%s);" % (unit,name,parsed[0].value,lo)]
+ else :
+ name="T%s%sS" % (parsed[0].value,lo)
+ defns[name] = [name,"LorentzVector<complex<%s> > %s = T%s.postDot(%s);" % (unit,name,parsed[0].value,lo)]
+ parsed[0]=""
+ if(output=="") : output="1."
+ output = "(%s)*(%s)" %(output,name)
+ else :
+ print 'problem with tensor',iloc
+ print parsed
+ quit()
+ # off-shell tensor
+ else :
+ tensor = tensorPropagator(parsed[0],defns)
+ if(output=="") : output="1."
+ output = [output,tensor,()]
+ elif(parsed[0].name=="Metric") :
+ found = False
+ for ll in parsed[0].lorentz :
+ if(ll.type=="E" and ll.value==iloc) :
+ found = True
+ else :
+ lo=ll
+ if(found) :
+ parsed[0]=""
+ if(lo.type=="P") :
+ dimension[2]+=1
+ if(output=="") : output="1."
+ output = "(%s)*(%s)" %(output,lo)
else :
- print "structure can't be handled",parsed
- raise skipThisVertex()
+ print "structure can't be handled",parsed,iloc
+ quit()
+ raise SkipThisVertex()
return (output,dimension)
def tensorPropagator(struct,defns) :
# dummy index
i0 = LorentzIndex(-1000)
# index for momentum of propagator
ip = LorentzIndex(struct.value)
ip.type="P"
# the metric tensor
terms=[]
if(len(struct.lorentz)==0) :
iTemp=(ip,ip)
if(iTemp in defns) :
dp = defns[iTemp][0]
else :
dp = "dot%s" % (len(defns)+1)
defns[iTemp] = [dp,"Energy2 %s = %s*%s;" % (dp,ip,ip)]
pre = "2./3.*(1.-%s*OM%s)" % (dp,struct.value)
terms.append(("-"+pre,i0,i0))
terms.append(("%s*OM%s" %(pre,struct.value),ip,ip))
else :
# indices of the tensor
ind1 = struct.lorentz[0]
ind2 = struct.lorentz[1]
# the dot products we need
iTemp = tuple(sorted((ind1,ip),cmp=indSort))
if(iTemp in defns) :
d1 = defns[iTemp][0]
else :
d1 = "dot%s" % (len(defns)+1)
unit = "Energy"
if(ind1.type=="P") : unit="Energy2"
defns[iTemp] = [d1,"complex<%s> %s = %s*%s;" % (unit,d1,ind1,ip)]
iTemp = tuple(sorted((ind2,ip),cmp=indSort))
if(iTemp in defns) :
d2 = defns[iTemp][0]
else :
d2 = "dot%s" % (len(defns)+1)
unit = "Energy"
if(ind2.type=="P") : unit="Energy2"
defns[iTemp] = [d2,"complex<%s> %s = %s*%s;" % (unit,d2,ind2,ip)]
iTemp = tuple(sorted((ind1,ind2),cmp=indSort))
if(iTemp in defns) :
d3 = defns[iTemp][0]
else :
d3 = "dot%s" % (len(defns)+1)
dtemp=0
if(ind1.type=="P") : dtemp+=1
if(ind2.type=="P") : dtemp+=1
unit=computeUnit(dtemp)
defns[iTemp] = [d3,"complex<%s> %s = %s*%s;" % (unit,d3,ind1,ind2)]
# various terms in the propagator
terms.append(("1",ind1,ind2))
terms.append(("-OM%s*%s"%(struct.value,d1),ip,ind2))
terms.append(("-OM%s*%s"%(struct.value,d2),ind1,ip))
terms.append(("1",ind2,ind1))
terms.append(("-OM%s*%s"%(struct.value,d2),ip,ind1))
terms.append(("-OM%s*%s"%(struct.value,d1),ind2,ip))
terms.append(("-2./3.*"+d3,i0,i0))
terms.append(("2./3.*OM%s*%s*%s"%(struct.value,d1,d2),i0,i0))
terms.append(("2./3.*OM%s*%s"%(struct.value,d3),ip,ip))
- terms.append(("4./3.*OM3*OM%s*%s*%s"%(struct.value,d1,d2),ip,ip))
+ terms.append(("4./3.*OM%s*OM%s*%s*%s"%(struct.value,struct.value,d1,d2),ip,ip))
# compute the output as a dict
output={}
for i1 in imap:
for i2 in imap :
val=""
for term in terms:
if(term[0][0]!="-") :
pre = "+"+term[0]
else :
pre = term[0]
if(term[1]==i0) :
if(i1==i2) :
if(i1=="t") :
val += pre
else :
if(pre[0]=="+") :
val +="-"+pre[1:]
else :
val +="+"+pre[1:]
else :
- val += "%s*%s.%s()*%s.%s()" % (pre,term[1],i1,term[1],i2)
+ val += "%s*%s.%s()*%s.%s()" % (pre,term[1],i1,term[2],i2)
output["%s%s" % (i1,i2) ] = val.replace("+1*","+").replace("-1*","-")
return output
def generateVertex(iloc,L,parsed,lorentztag,vertex,defns) :
eps=False
# parse the lorentz structures
output = [1.]*len(parsed)
dimension=[]
for i in range(0,len(parsed)) :
dimension.append([0,0,0])
for i in range (0,len(parsed)) :
(output[i],parsed[i],dimension[i]) = finishParsing(parsed[i],dimension[i],lorentztag,iloc,defns)
# still need to process gamma matrix strings for fermions
if(lorentztag[0] in ["F","R"] ) :
return convertDirac(output,dimension,eps,iloc,L,parsed,lorentztag,vertex,defns)
# return the answer
else :
handled=True
for i in range (0,len(parsed)) :
if(len(parsed[i])!=0) :
handled = False
break
if(not handled) :
print 'in NOT HANDLED',parsed,output
for i in range (0,len(parsed)) :
(output[i],dimension[i]) = finalContractions(output[i],parsed[i],dimension[i],lorentztag,iloc,defns)
print output[i]
return (output,dimension,eps)
def convertDirac(output,dimension,eps,iloc,L,parsed,lorentztag,vertex,defns) :
for i in range(0,len(parsed)):
# skip empty elements
if(len(parsed[i])==0 or (len(parsed[i])==1 and parsed[i][0]=="")) : continue
# parse the string
(output[i],dimension[i],defns) = convertDiracStructure(parsed[i],output[i],dimension[i],
defns,iloc,L,lorentztag,vertex)
print 'after convert loop',output
print dimension
return (output,dimension,eps)
# parse the gamma matrices
def convertMatrix(structure,expr,spins,unContracted,Symbols,dtemp,iloc,defns) :
i1 = structure.spin[0]
i2 = structure.spin[1]
if(structure.name=="Identity") :
expr += "*%s" % I4
structure=""
elif(structure.name=="Gamma5") :
expr += "*%s" % G5
structure=""
elif(structure.name=="ProjM") :
expr += "*%s" % PM
structure=""
elif(structure.name=="ProjP") :
expr += "*%s" % PP
structure=""
elif(structure.name=="Gamma") :
print structure
# lorentz matrix contracted with the propagator
if(structure.lorentz[0].type=="D") :
if(abs(structure.lorentz[0].value) not in unContracted) :
unContracted.append(abs(structure.lorentz[0].value))
expr += "*U%s" % abs(structure.lorentz[0].value)
structure=""
elif(structure.lorentz[0].type=="E" and
spins[structure.lorentz[0].value-1]==4) :
expr += "*R%s" % structure.lorentz[0][1]
unContracted.append("R%s" % structure.lorentz[0][1])
structure=""
elif(structure.lorentz[0].type == "E" and
structure.lorentz[0].value == iloc ) :
expr += "*V%s" % iloc
unContracted.append("V%s" % iloc)
structure=""
else :
expr += "*"+vslash.substitute({ "v" : structure.lorentz[0]})
Symbols += vslashS.substitute({ "v" : structure.lorentz[0]})
if(structure.lorentz[0].type=="P") :
dtemp[2] += 1
variable="Energy"
else :
variable="double"
defns["vv%s" % structure.lorentz[0] ] = \
["vv%s" % structure.lorentz[0],
vslashD.substitute({ "var" : variable,
"v" : structure.lorentz[0]})]
structure=""
else :
print 'Unknown Gamma matrix structure',structure
raise SkipThisVertex()
return (i1,i2,expr,structure,unContracted,Symbols,dtemp)
def convertDiracStructure(parsed,output,dimension,defns,iloc,L,lorentztag,vertex) :
print 'start of structure',iloc
# templates
spinor = Template("Matrix([[${s}s1],[${s}s2],[${s}s3],[${s}s4]])")
sbar = Template("Matrix([[${s}s1,${s}s2,${s}s3,${s}s4]])")
sline = Template("${s}s1=Symbol(\"${s}s1\")\n${s}s2=Symbol(\"${s}s2\")\n${s}s3=Symbol(\"${s}s3\")\n${s}s4=Symbol(\"${s}s4\")\n")
# get the spins of the particles
spins = vertex.lorentz[0].spins
# check if we have one or two spin chains
nchain = (lorentztag.count("F")+lorentztag.count("R"))/2
expr=[]
sind=[]
lind=[]
start=[]
end=[]
startT=[]
endT=[]
unContracted=[]
Symbols=""
dtemp=[0,0,0]
for ichain in range(0,nchain) :
# piece of dimension which is common (0.5 for sbar and spinor)
dtemp[0]+=1
# set up the spin indices
sind.append(0)
lind.append(0)
# and the expresion
expr.append("")
# now find the next thing in the string
ii = 0
index=0
while True :
# already handled
if(parsed[ii]=="") :
ii+=1
continue
# start of the chain
elif(sind[ichain]==0 and len(parsed[ii].spin)==2 and parsed[ii].spin[0]>0 ) :
(sind[ichain],index,expr[ichain],parsed[ii],unContracted,Symbols,dtemp) \
= convertMatrix(parsed[ii],expr[ichain],spins,unContracted,Symbols,dtemp,iloc,defns)
# next element in the chain
elif(index!=0 and len(parsed[ii].spin)==2 and parsed[ii].spin[0]==index) :
(crap,index,expr[ichain],parsed[ii],unContracted,Symbols,dtemp) \
= convertMatrix(parsed[ii],expr[ichain],spins,unContracted,Symbols,dtemp,iloc,defns)
# check the index to see if we're at the end
if(index>0) :
lind[ichain]=index
break
ii+=1
if(ii>=len(parsed)) :break
# start and end of the spin chains
# easy case, both spin 1/2
if(spins[sind[ichain]-1]==2 and spins[lind[ichain]-1]==2) :
# start of chain
# off shell
if(sind[ichain]==iloc) :
start.append(vslashM.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain]} ))
Symbols += vslashMS.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain]} )
defns["vvP%s" % sind[ichain] ] = ["vvP%s" % sind[ichain] ,
vslashD.substitute({ "var" : "Energy",
"v" : "P%s" % sind[ichain] })]
dtemp[1]+=1
# onshell
else :
subs = {'s' : ("sbar%s" % sind[ichain])}
start.append(sbar .substitute(subs))
Symbols += sline.substitute(subs)
# end of chain
if(lind[ichain]==iloc) :
end.append(vslashM2.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain]} ))
Symbols += vslashMS.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain]} )
defns["vvP%s" % lind[ichain] ] = ["vvP%s" % lind[ichain] ,
vslashD.substitute({ "var" : "Energy",
"v" : "P%s" % lind[ichain] })]
dtemp[1] += 1
else :
subs = {'s' : ("s%s" % lind[ichain])}
end.append(spinor.substitute(subs))
Symbols += sline.substitute(subs)
startT.append(start[ichain])
endT .append(end[ichain])
# start 1/2 and end 3/2
elif spins[sind[ichain]-1]==2 and spins[lind[ichain]-1]==4 :
# spin 1/2 fermion
if(sind[ichain]==iloc) :
start.append(vslashM.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain]} ))
Symbols += vslashMS.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain]} )
endT.append(vslashM2.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain]} ))
defns["vvP%s" % sind[ichain] ] = ["vvP%s" % sind[ichain] ,
vslashD.substitute({ "var" : "Energy",
"v" : "P%s" % sind[ichain] })]
dtemp[1]+=1
else :
subs = {'s' : ("sbar%s" % sind[ichain])}
start.append(sbar .substitute(subs))
Symbols += sline.substitute(subs)
subs = {'s' : ("s%s" % sind[ichain])}
endT.append(spinor.substitute(subs))
Symbols += sline.substitute(subs)
# spin 3/2 fermion
if(lind[ichain]==iloc) :
contract=""
for k in range(1,len(vertex.particles)+1) :
if(output.find("(P%s)" %k)>=0) :
output = output.replace("(P%s)" %k,"1.")
contract="P%s" %k
end.append(rslash2.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain],
"loc" : lind[ichain] }))
Symbols += vslashMS.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain]} )
startT.append(rslash.substitute({ "v" : "P%s" % lind[ichain],
"m" : "M%s" % lind[ichain], "loc" : lind[ichain] }))
defns["vvP%s" % lind[ichain] ] = ["vvP%s" % lind[ichain] ,
vslashD.substitute({ "var" : "Energy",
"v" : "P%s" % lind[ichain] })]
Symbols += momCom.substitute({"v" : "P%s" %lind[ichain] })
dtemp[1] += 1
if(contract!="") :
Symbols += momCom.substitute({"v" : contract })
RB = vslash.substitute({ "v" : contract})
Symbols += vslashS.substitute({ "v" : contract })
startT[ichain] = startT[ichain].replace("R%sB"%lind[ichain],RB)
end [ichain] = end [ichain].replace("R%sB"%lind[ichain],RB)
name = "dot%s" % (len(defns)+1)
defns[('P%s'%lind[ichain],contract)] = [name,"complex<Energy2> %s = P%s*%s;" % (name,lind[ichain],contract) ]
Symbols += "%s = Symbol('%s')\n" % (name,name)
startT[ichain] = startT[ichain].replace("P%sB!" % lind[ichain], name).replace("ETA(B!,","ETA(%s," % contract)
end [ichain] = end [ichain].replace("P%sB!" % lind[ichain], name).replace("ETA(B!,","ETA(%s," % contract)
unContracted.append("RC%s"%lind[ichain])
else :
# check if we have a contraction issue
contract=""
for key,val in defns.iteritems() :
if(not isinstance(key,tuple)) : continue
if(key[0]== "E%s" %lind[ichain]) :
if(output.find("(%s)"%val[0])>=0) :
contract=key[1]
output = output.replace("(%s)"%val[0],"1.")
elif(key[1]=="E%s" %lind[ichain]) :
if(output.find("(%s)"%val[0])>=0) :
contract=key[0]
output = output.replace("(%s)"%val[0],"1.")
if(contract=="") :
end.append(spinor.substitute({'s' : ("Rs%sL" % lind[ichain])}))
startT.append(sbar .substitute({'s' : ("Rsbar%sL" % lind[ichain])}))
for LI in imap :
Symbols += sline.substitute({'s' : ("Rs%s%s" % (lind[ichain],LI))})
Symbols += sline.substitute({'s' : ("Rsbar%s%s" % (lind[ichain],LI))})
else :
dTemp = Template("${s}ts${si}*${v}t-${s}xs${si}*${v}x-${s}ys${si}*${v}y-${s}zs${si}*${v}z")
startT.append("Matrix([[%s,%s,%s,%s]])" % (dTemp.substitute({'s' : ("Rsbar%s" % lind[ichain]), 'v':contract, 'si' : 1}),
dTemp.substitute({'s' : ("Rsbar%s" % lind[ichain]), 'v':contract, 'si' : 2}),
dTemp.substitute({'s' : ("Rsbar%s" % lind[ichain]), 'v':contract, 'si' : 3}),
dTemp.substitute({'s' : ("Rsbar%s" % lind[ichain]), 'v':contract, 'si' : 4})))
end .append("Matrix([[%s],[%s],[%s],[%s]])" % (dTemp.substitute({'s' : ("Rs%s" % lind[ichain]), 'v':contract, 'si' : 1}),
dTemp.substitute({'s' : ("Rs%s" % lind[ichain]), 'v':contract, 'si' : 2}),
dTemp.substitute({'s' : ("Rs%s" % lind[ichain]), 'v':contract, 'si' : 3}),
dTemp.substitute({'s' : ("Rs%s" % lind[ichain]), 'v':contract, 'si' : 4})))
Symbols += momCom.substitute({"v" : contract })
for LI in ["x","y","z","t"] :
Symbols += sline.substitute({'s' : ("Rs%s%s" % (lind[ichain],LI))})
Symbols += sline.substitute({'s' : ("Rsbar%s%s" % (lind[ichain],LI))})
# start 1/2 and end 3/2
elif spins[sind[ichain]-1]==4 and spins[lind[ichain]-1]==2 :
# spin 3/2 fermion
if(sind[ichain]==iloc) :
contract=""
for k in range(1,len(vertex.particles)+1) :
if(output.find("(P%s)" %k)>=0) :
output = output.replace("(P%s)" %k,"1.")
contract="P%s" %k
start.append(rslash.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain], "loc" : sind[ichain] }))
Symbols += vslashMS.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain]} )
endT.append(rslash2.substitute({ "v" : "P%s" % sind[ichain], "m" : "M%s" % sind[ichain], "loc" : sind[ichain] }))
defns["vvP%s" % sind[ichain] ] = ["vvP%s" % sind[ichain] ,
vslashD.substitute({ "var" : "Energy",
"v" : "P%s" % sind[ichain] })]
Symbols += momCom.substitute({"v" : "P%s" %sind[ichain] })
dtemp[1] += 1
if(contract!="") :
Symbols += momCom.substitute({"v" : contract })
RB = vslash.substitute({ "v" : contract})
Symbols += vslashS.substitute({ "v" : contract })
start[ichain] = start[ichain].replace("R%sB"%sind[ichain],RB)
endT [ichain] = endT [ichain].replace("R%sB"%sind[ichain],RB)
name = "dot%s" % (len(defns)+1)
defns[('P%s'%sind[ichain],contract)] = [name,"complex<Energy2> %s = P%s*%s;" % (name,sind[ichain],contract) ]
Symbols += "%s = Symbol('%s')\n" % (name,name)
start[ichain] = start[ichain].replace("P%sB!" % sind[ichain], name).replace("ETA(B!,","ETA(%s," % contract)
endT [ichain] = endT [ichain].replace("P%sB!" % sind[ichain], name).replace("ETA(B!,","ETA(%s," % contract)
unContracted.append("RC%s"%sind[ichain])
else :
# check if we have a contraction issue
contract=""
for key,val in defns.iteritems() :
if(not isinstance(key,tuple)) : continue
if(key[0]== "E%s" %sind[ichain]) :
if(output.find("(%s)"%val[0])>=0) :
contract=key[1]
output = output.replace("(%s)"%val[0],"1.")
elif(key[1]=="E%s" %sind[ichain]) :
if(output.find("(%s)"%val[0])>=0) :
contract=key[0]
output = output.replace("(%s)"%val[0],"1.")
if(contract=="") :
start = sbar .substitute({'s' : ("Rsbar%sL" % sind[ichain])})
endT = spinor.substitute({'s' : ("Rs%sL" % sind[ichain])})
for LI in imap :
Symbols += sline.substitute({'s' : ("Rs%s%s" % (sind[ichain],LI))})
Symbols += sline.substitute({'s' : ("Rsbar%s%s" % (sind[ichain],LI))})
else :
dTemp = Template("${s}ts${si}*${v}t-${s}xs${si}*${v}x-${s}ys${si}*${v}y-${s}zs${si}*${v}z")
start.append("Matrix([[%s,%s,%s,%s]])" % (dTemp.substitute({'s' : ("Rsbar%s" % sind[ichain]), 'v':contract, 'si' : 1}),
dTemp.substitute({'s' : ("Rsbar%s" % sind[ichain]), 'v':contract, 'si' : 2}),
dTemp.substitute({'s' : ("Rsbar%s" % sind[ichain]), 'v':contract, 'si' : 3}),
dTemp.substitute({'s' : ("Rsbar%s" % sind[ichain]), 'v':contract, 'si' : 4})))
endT .append("Matrix([[%s],[%s],[%s],[%s]])" % (dTemp.substitute({'s' : ("Rs%s" % sind[ichain]), 'v':contract, 'si' : 1}),
dTemp.substitute({'s' : ("Rs%s" % sind[ichain]), 'v':contract, 'si' : 2}),
dTemp.substitute({'s' : ("Rs%s" % sind[ichain]), 'v':contract, 'si' : 3}),
dTemp.substitute({'s' : ("Rs%s" % sind[ichain]), 'v':contract, 'si' : 4})))
Symbols += momCom.substitute({"v" : contract })
for LI in ["x","y","z","t"] :
Symbols += sline.substitute({'s' : ("Rs%s%s" % (sind[ichain],LI))})
Symbols += sline.substitute({'s' : ("Rsbar%s%s" % (sind[ichain],LI))})
if(lind[ichain]==iloc) :
end .append(vslashM2.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain]} ))
startT.append(vslashM.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain]} ))
Symbols += vslashMS.substitute({ "v" : "P%s" % lind[ichain], "m" : "M%s" % lind[ichain]} )
defns["vvP%s" % lind[ichain] ] = ["vvP%s" % lind[ichain] ,
vslashD.substitute({ "var" : "Energy",
"v" : "P%s" % lind[ichain] })]
dtemp[1] += 1
else :
subs = {'s' : ("s%s" % lind[ichain])}
end .append(spinor.substitute(subs))
Symbols += sline.substitute(subs)
subs = {'s' : ("sbar%s" % lind[ichain])}
startT .append(sbar .substitute(subs))
Symbols += sline.substitute(subs)
else :
print 'At most one R-S spinor allowed in a vertex'
raise SkipThisVertex()
# remove leading *
for i in range(0,nchain) : expr[i]=expr[i][1:]
# check we've dealt with everything
parsed = [x for x in parsed if x != ""]
if(len(parsed)!=0) :
for i in range(0,len(parsed)) :
if(parsed[i].name=="Metric") :
found = False
for ll in parsed[i].lorentz :
if(ll.type=="E" and ll.value==iloc) :
found = True
else :
lo=ll
if(found) :
parsed[i]=""
for i in range(0,nchain) :
expr[i]+="*%s(V%s)" % (lo,iloc)
unContracted.append("V%s" % iloc)
if(lo.type=="P") : dimension[2]+=1
parsed = [x for x in parsed if x != ""]
if(len(parsed)!=0) :
print expr
print "Can't parse ",parsed,iloc
quit()
raise SkipThisVertex()
sVal ={}
# deal with the simplest case first
if len(unContracted) == 0 :
print 'testing in simple case'
temp={}
exec("import sympy\nfrom sympy import Symbol,Matrix\n"+Symbols+"result="+
( "%s*%s*%s" %(start[0],expr[0],end[0]))) in temp
tempT={}
exec("import sympy\nfrom sympy import Symbol,Matrix,Transpose\n"+Symbols+"result="+
( "%s*%s*Transpose(%s)*%s*%s" %(startT[0],CC,expr[0],CD,endT[0]))) in tempT
if(iloc==0 or (iloc!=sind[ichain] and iloc!=lind[ichain])) :
sVal = {'s' : temp ["result"][0,0],'sT' : tempT["result"][0,0]}
else :
for jj in range(1,5) :
sVal["s%s" % jj] = temp ["result"][jj-1]
sVal["sT%s" % jj] = tempT["result"][jj-1]
print 'before un',sVal
# now deal with the uncontracted cases
contracted=[]
# sort out contracted and uncontracted indices
for j in range(0,len(unContracted)) :
# summed index
if(isinstance(unContracted[j],int)) :
contracted.append(unContracted[j])
unContracted.remove(unContracted[j])
# RS index
elif unContracted[j][0]=="R" :
if(unContracted[j][1]=="C") :
unContracted[j] = unContracted[j].replace("C","")
else :
contracted.append(unContracted[j])
if(int(unContracted[j][1])!=iloc):
unContracted.remove(unContracted[j])
# uncontracted vector index
elif unContracted[j][0]=="V" :
continue
else :
print 'uknown type of uncontracted index',unContracted[j]
raise SkipThisVertex()
# iterate over the uncontracted indices
unI=[0]*len(unContracted)
defns["I"] = ["I","static Complex I(0.,1.);"]
print 'before un loop',unContracted,contracted
while True :
if(len(contracted)==0 and len(unContracted)==0) : break
coI=[0]*len(contracted)
# loop over the contracted indices
res = []
for i in range(0,nchain) :
res.append([])
res.append([])
while True :
sign = 1
sTemp = copy.copy(start )
sTTemp = copy.copy(startT)
eTemp = copy.copy(expr )
fTemp = copy.copy(end )
fTTemp = copy.copy(endT )
# make the necessary replacements for uncontracted indices
for ichain in range(0,nchain) :
for j in range(0,len(unContracted)) :
if(unContracted[j][0]=="R") :
ii = int(unContracted[j][1])
sTemp[ichain] = sTemp[ichain].replace(unContracted[j]+"A",dirac[unI[j]])
sTTemp[ichain] = sTTemp[ichain].replace(unContracted[j]+"A",dirac[unI[j]])
fTemp[ichain] = fTemp[ichain].replace(unContracted[j]+"A",dirac[unI[j]])
fTTemp[ichain] = fTTemp[ichain].replace(unContracted[j]+"A",dirac[unI[j]])
sTemp[ichain] = sTemp[ichain].replace("A!",imap[unI[j]])
sTTemp[ichain] = sTTemp[ichain].replace("A!",imap[unI[j]])
fTemp[ichain] = fTemp[ichain].replace("A!",imap[unI[j]])
fTTemp[ichain] = fTTemp[ichain].replace("A!",imap[unI[j]])
# handle metric tensors
eta=re.search("ETA\(.*,.\)",sTemp[ichain])
if(eta) :
eta = eta.group(0)
if(eta.find("!")<0) :
temp = eta.split("(")[1].split(",")
replace = temp[0]+temp[1][0]
sTemp[ichain] = sTemp[ichain].replace(eta,replace)
sTTemp[ichain] = sTTemp[ichain].replace(eta,replace)
fTemp[ichain] = fTemp[ichain].replace(eta,replace)
fTTemp[ichain] = fTTemp[ichain].replace(eta,replace)
elif(unContracted[j][0]=="V") :
print unContracted[j][0]
print eTemp[ichain]
loc = eTemp[ichain].find("(%s)"%unContracted[j])
if(loc>=0) :
vec=eTemp[ichain][loc-2:loc]
Symbols += momCom.substitute({"v":vec})
print "!!!!!!",vec
eTemp[ichain] = eTemp[ichain].replace("(%s)"%unContracted[j],imap[unI[j]])
else :
eTemp[ichain] = eTemp[ichain].replace(unContracted[j],dirac[unI[j]])
print eTemp[ichain]
else :
print 'uknown type of uncontracted index',unContracted[j]
raise SkipThisVertex()
# make the necessary replacements for contracted indices
for ichain in range(0,nchain) :
for j in range(0,len(contracted)) :
if(isinstance(contracted[j],int)) :
eTemp[ichain]=eTemp[ichain].replace("U%s"%contracted[j],dirac[coI[j]])
if(ichain==0 and coI[j]>0) : sign *= -1
elif(contracted[j][0]=="R") :
ii = int(contracted[j][1])
# replace metric
for k in range(0,4) :
test = "ETA(B!,%s)" % (imap[k])
esign="0"
if(coI[j]==k) : esign="1"
sTemp[ichain] = sTemp[ichain].replace(test,esign)
sTTemp[ichain] = sTTemp[ichain].replace(test,esign)
fTemp[ichain] = fTemp[ichain].replace(test,esign)
fTTemp[ichain] = fTTemp[ichain].replace(test,esign)
# replace dirac matrices
eTemp[ichain] = eTemp[ichain].replace(contracted[j],dirac[coI[j]])
sTemp[ichain] = sTemp[ichain].replace(contracted[j]+"B",dirac[coI[j]])
sTTemp[ichain] = sTTemp[ichain].replace(contracted[j]+"B",dirac[coI[j]])
fTemp[ichain] = fTemp[ichain].replace(contracted[j]+"B",dirac[coI[j]])
fTTemp[ichain] = fTTemp[ichain].replace(contracted[j]+"B",dirac[coI[j]])
# replacements for start
sTemp[ichain] = sTemp[ichain].replace("Rsbar%sL" % ii,"Rsbar%s%s" % (ii,imap[coI[j]]))
sTTemp[ichain] = sTTemp[ichain].replace("Rsbar%sL" % ii,"Rsbar%s%s" % (ii,imap[coI[j]]))
sTemp[ichain] = sTemp[ichain].replace("B!",imap[coI[j]])
sTTemp[ichain] = sTTemp[ichain].replace("B!",imap[coI[j]])
# replacements for end
fTemp[ichain] = fTemp[ichain].replace("Rs%sL" % ii,"Rs%s%s" % (ii,imap[coI[j]]))
fTTemp[ichain] = fTTemp[ichain].replace("Rs%sL" % ii,"Rs%s%s" % (ii,imap[coI[j]]))
fTemp[ichain] = fTemp[ichain].replace("B!",imap[coI[j]])
fTTemp[ichain] = fTTemp[ichain].replace("B!",imap[coI[j]])
if(ichain==0 and coI[j]>0) : sign *= -1
else :
print 'need to implment',contracted[j]
quit()
# now evaluate the result
rTemp =[[],[]]
for ichain in range(0,nchain) :
temp={}
exec("import sympy\nfrom sympy import Symbol,Matrix\n"+Symbols+"result="+
( "(%s)*(%s)*(%s)" %(sTemp[ichain],eTemp[ichain],fTemp[ichain]))) in temp
rTemp[0].append(temp["result"])
temp={}
exec("import sympy\nfrom sympy import Symbol,Matrix,Transpose\n"+Symbols+"result="+
( "(%s)*(%s)*(Transpose(%s))*(%s)*(%s)" %(sTTemp[ichain],CC,eTemp[ichain],CD,fTTemp[ichain]))) in temp
rTemp[1].append(temp["result"])
# and add it to the output
# 1 spin chain
if(nchain==1) :
for ii in range(0,2) :
if(rTemp[ii][0].shape[0]==1) :
if(rTemp[ii][0].shape[1]==1) :
if(len(res[ii])==0) :
res[ii].append(sign*rTemp [ii][0][0,0])
else :
res[ii][0] += sign*rTemp [ii][0][0,0]
elif(rTemp[ii][0].shape[1]==4) :
if(len(res[ii])==0) :
for j in range(0,4) :
res[ii].append(sign*rTemp[ii][0][0,j])
else :
for j in range(0,4) :
res[ii][j] += sign*rTemp[ii][0][0,j]
else :
print "SIZE PROBLEM A",sign,rTemp[ii].shape
quit()
raise SkipThisVertex()
elif(rTemp[ii][0].shape[0]==4 and rTemp[ii][0].shape[1]==1 ) :
if(len(res[ii])==0) :
for j in range(0,4) :
res[ii].append(sign*rTemp[ii][0][j,0])
else :
for j in range(0,4) :
res[ii][j] += sign*rTemp[ii][0][j,0]
else :
print "SIZE PROBLEM B ",sign,rTemp[ii][0].shape
quit()
raise SkipThisVertex()
# 2 spin chains, should only be for a vertex
else :
for j1 in range(0,2) :
for j2 in range (0,2) :
val = sign*rTemp[j1][0]*rTemp[j2][1]
if(len(res[3])==0) :
res[2*j1+j2].append(val[0,0])
else :
res[2*j1+j2][0] += val[0,0]
#### END OF THE CONTRACTED LOOP #####
# increment the indices being summed over
ii = len(coI)-1
while ii >=0 :
if(coI[ii]<3) :
coI[ii]+=1
break
else :
coI[ii]=0
ii-=1
if(coI.count(0)==len(coI)) : break
###### END OF THE UNCONTRACTED LOOP ######
# no uncontracted indices
if(len(unI)==0) :
if(len(res[0])==1) :
if(len(res)==2) :
sVal["s" ] = res[0]
sVal["sT"] = res[1]
else :
sVal["s" ] = res[0][0]
sVal["sT2" ] = res[1][0]
sVal["sT1" ] = res[2][0]
sVal["sT12"] = res[3][0]
elif(len(res)==4) :
for k in range(0,4) :
sVal[ "s%s" % (k+1) ] = res[0][k]
sVal[ "sT%s" % (k+1) ] = res[1][k]
break
# uncontracted indices
else :
istring = ""
for val in unI:
istring +=imap[val]
if(len(istring)!=1) :
print 'index problem',istring
print unContracted
print unI
quit()
sVal[istring] = res[0]
sVal[istring+"T"] = res[1]
ii = len(unI)-1
while ii >=0 :
if(unI[ii]<3) :
unI[ii]+=1
break
else :
unI[ii]=0
ii-=1
if(unI.count(0)==len(unI)) : break
# handle the vector case
if( "t" in sVal ) :
# deal with pure vectors
if(len(sVal)==8 and "t" in sVal and len(sVal["t"])==1) :
for key in sVal:
sVal[key] = sVal[key][0]
# unit = computeUnit(dtemp)
# sVal = { "s" : "LorentzVector<complex<%s> >(%s,%s,%s,%s)" % (unit,sVal["x" ][0],sVal["y" ][0],sVal["z" ][0],sVal["t" ][0]),
# "sT" : "LorentzVector<complex<%s> >(%s,%s,%s,%s)" % (unit,sVal["xT"][0],sVal["yT"][0],sVal["zT"][0],sVal["tT"][0]) }
# print sVal
else :
print 'val problrm A'
quit()
# # print 'testing vector problem',len(sVal),len(sVal["t"])
# # quit()
# # # if(expr=="") :
# # # expr ={}
# # # exprT={}
# # # defns["I"] = ["I","static Complex I(0.,1.);"]
# # # unit = computeUnit(dtemp)
# # # if(pre=="") :
# # # exprT["s"] = "LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (unit,vals[i][2]["x"],vals[i][2]["y"],vals[i][2]["z"],vals[i][2]["t"])
# # # else :
# # # expr ["s"] = "%s*LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (pre,unit,vals[i][1]["x"],vals[i][1]["y"],vals[i][1]["z"],vals[i][1]["t"])
# # # exprT["s"] = "%s*LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (pre,unit,vals[i][2]["x"],vals[i][2]["y"],vals[i][2]["z"],vals[i][2]["t"])
# # # else :
# # # unit = computeUnit(dtemp)
# # # if(pre=="") :
# # # expr ["s"] += "LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (unit,vals[i][1]["x"],vals[i][1]["y"],vals[i][1]["z"],vals[i][1]["t"])
# # # exprT["s"] += "LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (unit,vals[i][2]["x"],vals[i][2]["y"],vals[i][2]["z"],vals[i][2]["t"])
# # # else :
# # # expr ["s"] += "%s*LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (pre,unit,vals[i][1]["x"],vals[i][1]["y"],vals[i][1]["z"],vals[i][1]["t"])
# # # exprT["s"] += "%s*LorentzVector<complex<%s> >(%s,%s,%s,%s)" % \
# # # (pre,unit,vals[i][2]["x"],vals[i][2]["y"],vals[i][2]["z"],vals[i][2]["t"])
# # # print 'CCCCC',len(vals[i])
old = output
if(nchain==1) :
print "SETTING UP THE OUTPUT ",old
print "B",sVal
output = [old,sVal,(lind[0],sind[0])]
else :
output = [old,sVal,(lind[0],sind[0],lind[1],sind[1])]
dimension = list(map(lambda x, y: x + y, dtemp, dimension))
# remove any dot products involving RS fermions
if("R" in lorentztag ) :
for key in defns.keys() :
if(not isinstance(key,tuple)) : continue
if(key[0]== "E%s" %sind or key[1]=="E%s" %sind or
key[0]== "E%s" %lind[ichain] or key[1]=="E%s" %lind[ichain]) :
del defns[key]
return (output,dimension,defns)
def convertLorentz(Lstruct,lorentztag,order,vertex,iloc,defns,evalVertex) :
eps = False
# split the structure into individual terms
structures=Lstruct.structure.split()
parsed=[]
for struct in structures :
print struct
parsed.append(parse_structure(struct))
# convert lorentz contractions to dot products
print "before loop ", Lstruct.structure
print parsed
for l in range(0,len(parsed)) :
parsed[l] = contract(parsed[l])
print 'after loop',parsed
# now in a position to generate the code
vals=generateVertex(iloc,Lstruct,parsed,lorentztag,vertex,defns)
print iloc,Lstruct,lorentztag
print vals
evalVertex.append((vals[0],vals[1]))
if(vals[2]) : eps=True
print "END OF CONVERT LORENTZ",Lstruct,iloc,len(evalVertex)
print evalVertex
return eps
evaluateTemplate = """\
{decl} {{
{momenta}
{waves}
{swap}
{symbols}
{couplings}
{defns}
{result}
}}
"""
def swapOrder(vertex,iloc,momenta,fIndex) :
# special for 4 fermion case
if(vertex.lorentz[0].spins.count(2)==4) :
return swapOrderFFFF(vertex,iloc,momenta,fIndex)
names=['','sca','sp','v']
waves=['','sca','' ,'E']
output=""
for i in range(1,4) :
ns = vertex.lorentz[0].spins.count(i)
if((ns<=1 and i!=2) or (ns<=2 and i==2)) : continue
if(i!=3 and i!=1) :
print 'swap problem',i
quit()
sloc=[]
for j in range(0,len(vertex.lorentz[0].spins)) :
if(vertex.lorentz[0].spins[j]==i) : sloc.append(j+1)
if iloc in sloc : sloc.remove(iloc)
if(len(sloc)==1) : continue
for j in range(0,len(sloc)) :
output += " long id%s = %sW%s.id();\n" % (sloc[j],names[i],sloc[j])
for j in range(0,len(sloc)) :
for k in range(j+1,len(sloc)) :
code = vertex.particles[sloc[j]-1].pdg_code
output += " if(id%s!=%s) {\n" % (sloc[j],code)
output += " swap(id%s,id%s);\n" % (sloc[j],sloc[k])
output += " swap(%s%s,%s%s);\n" % (waves[i],sloc[j],waves[i],sloc[k])
if(momenta[sloc[j]-1][0] or momenta[sloc[k]-1][0]) :
momenta[sloc[j]-1][0] = True
momenta[sloc[k]-1][0] = True
output += " swap(P%s,P%s);\n" % (sloc[j],sloc[k])
output += " };\n"
return output
def swapOrderFFFF(vertex,iloc,momenta,fIndex) :
output=""
for j in range(0,len(fIndex)) :
if(j%2==0) :
output += " long id%s = sW%s.id();\n" % (fIndex[j],fIndex[j])
else :
output += " long id%s = sbarW%s.id();\n" % (fIndex[j],fIndex[j])
for j in range(0,2) :
code = vertex.particles[fIndex[j]-1].pdg_code
output += " if(id%s!=%s) {\n" % (fIndex[j],code)
output += " swap(id%s,id%s);\n" % (fIndex[j],fIndex[j+2])
wave="s"
if(j==1) : wave = "sbar"
output += " swap(%s%s,%s%s);\n" % (wave,fIndex[j],wave,fIndex[j+2])
if(momenta[fIndex[j]-1][0] or momenta[fIndex[j+2]-1][0]) :
momenta[fIndex[j]-1][0] = True
momenta[fIndex[j+2]-1][0] = True
output += " swap(P%s,P%s);\n" % (fIndex[j],fIndex[j+2])
output += " };\n"
return output
def constructSignature(vertex,order,iloc,decls,momenta,waves,fermionReplace,fIndex) :
nf=0
poff=""
offType="Complex"
for i in order :
spin = vertex.lorentz[0].spins[i-1]
if(i==iloc) :
if(spin==1) :
offType="ScalarWaveFunction"
elif(spin==2) :
if(i%2==1) :
offType="SpinorBarWaveFunction"
else :
offType="SpinorWaveFunction"
nf+=1
elif(spin==4) :
if(i==1) :
offType="RSSpinorBarWaveFunction"
else :
offType="RSSpinorWaveFunction"
nf+=1
elif(spin==3) :
offType="VectorWaveFunction"
elif(spin==5) :
offType="TensorWaveFunction"
else :
print 'unknown spin',spin
quit()
momenta.append([False,""])
else :
if(spin==1) :
decls.append("ScalarWaveFunction & scaW%s" % (i))
momenta.append([False,"Lorentz5Momentum P%s =-scaW%s.momentum();" % (i,i)])
waves.append("Complex sca%s = scaW%s.wave();" % (i,i))
elif(spin==2) :
if(i%2==1) :
decls.append("SpinorWaveFunction & sW%s" % (fIndex[i-1]))
momenta.append([False,"Lorentz5Momentum P%s =-sW%s.momentum();" % (fIndex[i-1],fIndex[i-1])])
waves.append("LorentzSpinor<double> s%s = sW%s.wave();" % (fIndex[i-1],fIndex[i-1]))
fermionReplace.append("s%s"%(fIndex[i-1]))
fermionReplace.append("sbar%s"%(fIndex[i-1]))
nf+=1
else :
decls.append("SpinorBarWaveFunction & sbarW%s" % (fIndex[i-1]))
momenta.append([False,"Lorentz5Momentum P%s =-sbarW%s.momentum();" % (fIndex[i-1],fIndex[i-1])])
waves.append("LorentzSpinorBar<double> sbar%s = sbarW%s.wave();" % (fIndex[i-1],fIndex[i-1]))
fermionReplace.append("sbar%s"%(fIndex[i-1]))
fermionReplace.append("s%s"%(fIndex[i-1]))
nf+=1
elif(spin==3) :
decls.append("VectorWaveFunction & vW%s" % (i))
momenta.append([False,"Lorentz5Momentum P%s =-vW%s.momentum();" % (i,i)])
waves.append("LorentzPolarizationVector E%s = vW%s.wave();" % (i,i))
elif(spin==4) :
if(i%2==1) :
decls.append("RSSpinorWaveFunction & RsW%s" % (i))
momenta.append([False,"Lorentz5Momentum P%s =-RsW%s.momentum();" % (i,i)])
waves.append("LorentzRSSpinor<double> Rs%s = RsW%s.wave();" % (i,i))
fermionReplace.append("Rs%s"%(i))
fermionReplace.append("Rsbar%s"%(i))
nf+=1
else :
decls.append("RSSpinorBarWaveFunction & RsbarW%s" % (i))
momenta.append([False,"Lorentz5Momentum P%s =-RsbarW%s.momentum();" % (i,i)])
waves.append("LorentzRSSpinorBar<double> Rsbar%s = RsbarW%s.wave();" % (i,i))
fermionReplace.append("Rs%s"%(i))
fermionReplace.append("Rsbar%s"%(i))
nf+=1
elif(spin==5) :
decls.append("TensorWaveFunction & tW%s" % (i))
momenta.append([False,"Lorentz5Momentum P%s =-tW%s.momentum();" % (i,i)])
waves.append("LorentzTensor<double> T%s = tW%s.wave();" % (i,i))
else :
print 'unknown spin',spin
quit()
poff += "-P%s" % (i)
poff = ("Lorentz5Momentum P%s = " % iloc ) + poff
sig=""
if(iloc==0) :
sig="%s evaluate(Energy2, const %s)" % (offType,", const ".join(decls))
+ # special for VVT vertex
+ if(len(vertex.lorentz[0].spins)==3 and vertex.lorentz[0].spins.count(3)==2 and
+ vertex.lorentz[0].spins.count(5)==1) :
+ sig = sig[0:-1] + ", Energy vmass=-GeV)"
else :
sig="%s evaluate(Energy2, int iopt, tcPDPtr out, const %s, complex<Energy> mass=-GeV, complex<Energy> width=-GeV)" % (offType,", const ".join(decls))
momenta.append([True,poff+";"])
+ # special for VVT vertex
+ if(len(vertex.lorentz[0].spins)==3 and vertex.lorentz[0].spins.count(3)==2 and
+ vertex.lorentz[0].spins.count(5)==1 and vertex.lorentz[0].spins[iloc-1]==5) :
+ sig=sig.replace("complex<Energy> mass=-GeV","Energy vmass=-GeV, complex<Energy> mass=-GeV")
for i in range(0,len(momenta)) : momenta[i][0]=True
return offType,nf,poff,sig
def combineResult(res,nf,ispin,fermionReplace,vertex) :
# extract the vals and dimensions
(vals,dim) = res
# construct the output structure
# vertex and off-shell scalars
if(ispin<=1) :
otype={'res':""}
# spins
elif(ispin==2) :
otype={'s1':"",'s2':"",'s3':"",'s4':""}
# vectors
elif(ispin==3) :
if( "t" in vals[0][1] ) :
otype={'t':"",'x':"",'y':"",'z':""}
else :
- print vals
- print 'spin problem',ispin
- quit()
+ otype={"res":""}
# off-shell tensors
elif(ispin==5) :
otype={}
for i1 in imap :
for i2 in imap :
otype["%s%s"%(i1,i2)]=""
else :
print vals
print 'spin problem',ispin
quit()
expr=[otype]
for i in range(0,nf-1) :
expr.append(copy.copy(otype))
# dimension for checking
dimCheck=dim[0]
for i in range(0,len(vals)) :
# simple signs
if(vals[i]=="+" or vals[i]=="-") :
for ii in range(0,len(expr)) :
for(key,val) in expr[ii].iteritems() :
expr[ii][key] = expr[ii][key]+vals[i]
continue
# check the dimensions
if(dimCheck[0]!=dim[i][0] or dimCheck[1]!=dim[i][1] or
dimCheck[2]!=dim[i][2]) :
print vertex.lorentz
- print "DIMENSION PROBLEM",i,dimCheck,dim,vertex,vals
- print vals
+ for i in range(0,len(vals)) :
+ print dim[i],vals[i]
+ print "DIMENSION PROBLEM",i,dimCheck,dim,vertex
quit()
# simplest case
if(isinstance(vals[i], basestring)) :
for ii in range(0,len(expr)) :
for(key,val) in expr[ii].iteritems() :
expr[ii][key] = expr[ii][key]+vals[i]
continue
# more complex structures
pre = vals[i][0]
if(pre=="(1.0)") : pre=""
if(not isinstance(vals[i][1],dict)) :
print 'must be a dict here'
raise SkipThisVertex()
# tensors
if("tt" in vals[i][1]) :
for i1 in imap :
for i2 in imap :
key="%s%s"%(i1,i2)
if(pre=="") :
expr[0][key] += "(%s)" % vals[i][1][key]
else :
expr[0][key] += "%s*(%s)" % (pre,vals[i][1][key])
if(len(expr)==2) :
if(pre=="") :
expr[1][key] +="(%s)" % vals[i][1][key+"T"]
else :
expr[1][key] +="%s*(%s)" % (pre,vals[i][1][key+"T"])
# standard fermion vertex case
elif(len(vals[i][1])==2 and "s" in vals[i][1] and "sT" in vals[i][1]) :
print expr
if(pre=="") :
expr[0]["res"] += "(%s)" % vals[i][1]["s"]
expr[1]["res"] += "(%s)" % vals[i][1]["sT"]
else :
expr[0]["res"] += "%s*(%s)" % (pre,vals[i][1]["s"])
expr[1]["res"] += "%s*(%s)" % (pre,vals[i][1]["sT"])
# spinor case
elif(len(vals[i][1])==8 and "s1" in vals[i][1]) :
for jj in range(1,5) :
if(pre=="") :
expr[0]["s%s" % jj] += "(%s)" % vals[i][1]["s%s" % jj]
expr[1]["s%s" % jj] += "(%s)" % vals[i][1]["sT%s" % jj]
else :
expr[0]["s%s" % jj] += "%s*(%s)" % (pre,vals[i][1]["s%s" % jj])
expr[1]["s%s" % jj] += "%s*(%s)" % (pre,vals[i][1]["sT%s" % jj])
# vector
elif(len(vals[i][1])%4==0 and "t" in vals[i][1]) :
for i1 in imap :
if(pre=="") :
expr[0][i1] += "(%s)" % vals[i][1][i1]
else :
expr[0][i1] += "%s*(%s)" % (pre,vals[i][1][i1])
if(len(expr)==2) :
if(pre=="") :
expr[1][i1] +="(%s)" % vals[i][1][i1+"T"]
else :
expr[1][i1] +="%s*(%s)" % (pre,vals[i][1][i1+"T"])
# 4 fermion vertex case
elif(len(vals[i][1])==4 and "sT12" in vals[i][1]) :
if(pre=="") :
expr[0]["res"] += "(%s)" % vals[i][1]["s"]
expr[1]["res"] += "(%s)" % vals[i][1]["sT2"]
expr[2]["res"] += "(%s)" % vals[i][1]["sT1"]
expr[3]["res"] += "(%s)" % vals[i][1]["sT12"]
else :
expr[0]["res"] += "%s*(%s)" % (pre,vals[i][1]["s"])
expr[1]["res"] += "%s*(%s)" % (pre,vals[i][1]["sT2"])
expr[2]["res"] += "(%s)" % vals[i][1]["sT1"]
expr[3]["res"] += "(%s)" % vals[i][1]["sT12"]
else :
print vals[i]
print 'problem with type'
quit()
# # unknown
# else :
# print 'unrecongnised case',vals[i]
# quit()
# # elif(len(vals[i][1])==4 and "t" in vals[i][1]) :
# # # two cases, either already a 'simple' vector
# # # or its an RS spinor
# # # RS first
# # if(len(vals[i][1]["t"])==4) :
# # if(expr=="") :
# # expr ={}
# # exprT={}
# # for jj in range(0,4) :
# # for k in range(1,5) :
# # if(pre=="") :
# # expr ["%ss%s" % (imap[jj],k)] = "(%s)" % vals[i][1][imap[jj]][k-1]
# # exprT["%ss%s" % (imap[jj],k)] = "(%s)" % vals[i][2][imap[jj]][k-1]
# # else :
# # expr ["%ss%s" % (imap[jj],k)] = "%s*(%s)" % (pre,vals[i][1][imap[jj]][k-1])
# # exprT["%ss%s" % (imap[jj],k)] = "%s*(%s)" % (pre,vals[i][2][imap[jj]][k-1])
# # else :
# # for jj in range(0,4) :
# # for k in range(1,5) :
# # if(pre=="") :
# # expr ["%ss%s" % (imap[jj],k)] += "(%s)" % vals[i][1][imap[jj]][k-1]
# # exprT["%ss%s" % (imap[jj],k)] += "(%s)" % vals[i][2][imap[jj]][k-1]
# # else :
# # expr ["%ss%s" % (imap[jj],k)] += "%s*(%s)" % (pre,vals[i][1][imap[jj]][k-1])
# # exprT["%ss%s" % (imap[jj],k)] += "%s*(%s)" % (pre,vals[i][2][imap[jj]][k-1])
# # # simple vector
# # else :
# # print 'vector case'
# # print vals[i]
# # print expr
# # quit()
# # else :
# # print "AAAAAAA"
# # print vertex,len(vals[i][1])
# # quit()
# tidy up fermion defns
for rep in fermionReplace :
for i in range(1,5) :
kmax=1
if(rep[0]=="R") : kmax=4
for k in range(0,kmax) :
if(rep[0]=="R") :
oldVal = "%s%ss%s" % (rep,imap[k],i)
newVal = "%s.%ss%s()" % (rep,imap[k],i)
else :
oldVal = "%ss%s" % (rep,i)
newVal = "%s.s%s()" % (rep,i)
for ii in range (0,len(expr)) :
for (key,val) in expr[ii].iteritems() :
expr[ii][key] = val.replace(oldVal,newVal)
# no of particles in the vertex
vDim = len(vertex.lorentz[0].spins)
# tidy up momentum components
for i in range(1,vDim+1) :
for k in range(0,4) :
oldVal = "P%s%s*" % (i,imap[k])
newVal = "P%s.%s()*" % (i,imap[k])
for ii in range(0,len(expr)) :
for (key,val) in expr[ii].iteritems() :
expr[ii][key] = val.replace(oldVal,newVal)
unit = computeUnit2(dimCheck,vDim)
if(unit!="") :
for ii in range(0,len(expr)) :
for (key,val) in expr[ii].iteritems() :
expr[ii][key] = "(%s)*(%s)" % (val,unit)
return expr
def combineComponents(result,offType,RS) :
# simplest case, just a value
if(len(result[0])==1 and "res" in result[0]) :
for i in range(0,len(result)) :
result[i] = result[i]["res"]
return
# calculate the substitutions
if(not isinstance(result[0],basestring)) :
subs=[]
for ii in range(0,len(result)) :
subs.append({})
for (key,val) in result[ii].iteritems() :
subs[ii]["out%s" % key]= val
# spinors
if("s1" in result[0]) :
stype = "LorentzSpinor"
sbtype = "LorentzSpinorBar"
if(offType.find("Bar")>0) : (stype,sbtype)=(sbtype,stype)
if(not RS) : sbtype=stype
subs[0]["type"] = stype
result[0] = Template("${type}<double>(${outs1},\n${outs2},\n${outs3},\n${outs4})").substitute(subs[0])
subs[1]["type"] = sbtype
result[1] = Template("${type}<double>(${outs1},\n${outs2},\n${outs3},\n${outs4})").substitute(subs[1])
# tensors
elif("tt" in result[0]) :
for ii in range(0,len(result)) :
result[ii] = Template("LorentzTensor<double>(${outxx},\n${outxy},\n${outxz},\n${outxt},\n${outyx},\n${outyy},\n${outyz},\n${outyt},\n${outzx},\n${outzy},\n${outzz},\n${outzt},\n${outtx},\n${outty},\n${outtz},\n${outtt})").substitute(subs[ii])
result[ii]=result[ii].replace("(+","(")
# vectors
elif("t" in result[0]) :
for ii in range(0,len(result)) :
result[ii] = Template("LorentzVector<Complex>(${outx},\n${outy},\n${outz},\n${outt})").substitute(subs[ii])
result[ii]=result[ii].replace("(+","(")
else :
print subs[0]
print result
print 'type not implemented'
quit()
# # final defns for more complicated types
# if("ts1" in result) :
# stype = "LorentzRSSpinor"
# sbtype = "LorentzRSSpinorBar"
# if(offType.find("Bar")>0) : (stype,sbtype)=(sbtype,stype)
# subs["type"] = stype
# result = Template("${type}<double>(${outxs1},\n${outxs2},\n${outxs3},\n${outxs4},\n${outys1},\n${outys2},\n${outys3},\n${outys4},\n${outzs1},\n${outzs2},\n${outzs3},\n${outzs4},\n${outts1},\n${outts2},\n${outts3},\n${outts4})").substitute(subs)
# subsT["type"] = sbtype
# resultT = Template("${type}<double>(${outxs1},\n${outxs2},\n${outxs3},\n${outxs4},\n${outys1},\n${outys2},\n${outys3},\n${outys4},\n${outzs1},\n${outzs2},\n${outzs3},\n${outzs4},\n${outts1},\n${outts2},\n${outts3},\n${outts4})").substitute(subsT)
# else :
# print result
# print 'type problem'
# quit()
def generateEvaluateFunction(model,vertex,iloc,values,defns,vertexEval,cf,order) :
RS = "R" in vertex.lorentz[0].name
FM = "F" in vertex.lorentz[0].name
# extract the start and end of the spin chains
if( RS or FM ) :
fIndex = vertexEval[0][0][0][2]
else :
fIndex=0
# first construct the signature of the function
decls=[]
momenta=[]
waves=[]
fermionReplace=[]
offType,nf,poff,sig = constructSignature(vertex,order,iloc,decls,momenta,waves,fermionReplace,fIndex)
# combine the different terms in the result
symbols=set()
localCouplings=[]
result=[]
ispin = 0
if(iloc!=0) :
ispin = vertex.lorentz[0].spins[iloc-1]
# put the lorentz structures and couplings together
for j in range(0,len(vertexEval)) :
# get the lorentz structure piece
print 'calling combine',j,vertex.lorentz[j]
expr = combineResult(vertexEval[j],nf,ispin,fermionReplace,vertex)
# get the coupling for this bit
val, sym = py2cpp(values[j])
localCouplings.append("Complex local_C%s = %s;\n" % (j,val))
symbols |=sym
# put them together
+ vtype="Complex"
+ if("res" in expr[0] and offType=="VectorWaveFunction") :
+ vtype="LorentzPolarizationVector"
if(len(result)==0) :
for ii in range(0,len(expr)) :
result.append({})
for (key,val) in expr[ii].iteritems() :
- result[ii][key] = " (local_C%s)*Complex(%s) " % (j,val)
+ result[ii][key] = " %s((local_C%s)*(%s)) " % (vtype,j,val)
else :
for ii in range(0,len(expr)) :
for (key,val) in expr[ii].iteritems():
- result[ii][key] += " + (local_C%s)*Complex(%s) " % (j,val)
+ result[ii][key] += " + %s((local_C%s)*(%s)) " % (vtype,j,val)
# for more complex types merge the spin/lorentz components
combineComponents(result,offType,RS)
# multiple by scalar wavefunctions
scalars=""
for i in range (0,len(vertex.lorentz[0].spins)) :
if(vertex.lorentz[0].spins[i]==1 and i+1!=iloc) :
scalars += "sca%s*" % (i+1)
if(scalars!="") :
for ii in range(0,len(result)) :
result[ii] = "(%s)*(%s)" % (result[ii],scalars[0:-1])
# vertex, just return the answer
if(iloc==0) :
if(FM and not RS) :
if(nf!=4) :
result = vTemplateT.format(iloc=fIndex[1],id=vertex.particles[fIndex[1]-1].pdg_code,
cf=py2cpp(cf)[0],res=result[0],resT=result[1])
else :
result = vTemplate4.format(iloc1=fIndex[1],iloc2=fIndex[3],
id1=vertex.particles[fIndex[1]-1].pdg_code,
id2=vertex.particles[fIndex[3]-1].pdg_code,
cf=py2cpp(cf)[0],res1=result[0],res2=result[1],res3=result[2],res4=result[3])
else :
- result = "return (%s)*(%s);\n" % (result[0],py2cpp(cf[0])[0])
+ result = "return (%s)*(%s);\n" % (result[0],py2cpp(cf)[0])
if(RS) :
result[1] = "return (%s)*(%s);\n" % (result[1],py2cpp(cf[0])[0])
# off-shell particle
else :
# off-shell scalar
if(vertex.lorentz[0].spins[iloc-1] == 1 ) :
if(RS) :
resultT = scaTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],res=result[1])
if(FM and not RS) :
result = scaTTemplate.format(iloc=iloc,res=result[0],resT=result[1],isp=fIndex[1],
id=vertex.particles[fIndex[1]-1].pdg_code,cf=py2cpp(cf[0])[0])
else :
result = scaTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],res=result[0])
# off-shell fermion
elif(vertex.lorentz[0].spins[iloc-1] == 2 ) :
if(RS) :
if(offType.find("Bar")>0) :
offTypeT=offType.replace("Bar","")
else :
offTypeT=offType.replace("Spinor","SpinorBar")
resultT = sTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],offTypeA=offTypeT.replace("WaveFunction",""),
res=result[1].replace( "M%s" % iloc, "mass" ),offTypeB=offTypeT)
if(FM and not RS) :
result = sTTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],offTypeA=offType.replace("WaveFunction",""),
res=result[0].replace( "M%s" % iloc, "mass" ),resT=result[1].replace( "M%s" % iloc, "mass" ),
offTypeB=offType,id=vertex.particles[iloc-1].pdg_code)
else :
result = sTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],offTypeA=offType.replace("WaveFunction",""),
res=result[0].replace( "M%s" % iloc, "mass" ),offTypeB=offType)
# off-shell vector
elif(vertex.lorentz[0].spins[iloc-1] == 3 ) :
if(FM and not RS) :
result = vecTTemplate.format(iloc=iloc,res=result[0],resT=result[1],isp=fIndex[1],
id=vertex.particles[fIndex[1]-1].pdg_code,
cf=py2cpp(cf[0])[0])
else :
- result = vecTemplate.format(iloc=iloc,res=result[0],cf=py2cpp(cf[0])[0])
+ result = vecTemplate.format(iloc=iloc,res=result[0],cf=py2cpp(cf)[0])
elif(vertex.lorentz[0].spins[iloc-1] == 4 ) :
if(offType.find("Bar")>0) :
offTypeT=offType.replace("Bar","")
else :
offTypeT=offType.replace("Spinor","SpinorBar")
resultT = RSTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],offTypeA=offTypeT.replace("WaveFunction",""),
res=result[1].replace( "M%s" % iloc, "mass" ),offTypeB=offTypeT)
result = RSTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],offTypeA=offType.replace("WaveFunction",""),
res=result[0].replace( "M%s" % iloc, "mass" ),offTypeB=offType)
# tensors
elif(vertex.lorentz[0].spins[iloc-1]) :
if(RS) :
print "RS spinors and tensors not handled"
quit()
if(FM) :
result = tenTTemplate.format(iloc=iloc,res=result[0],resT=result[1],isp=fIndex[1],
id=vertex.particles[fIndex[1]-1].pdg_code,cf=py2cpp(cf[0])[0])
else :
- result = tenTemplate.format(iloc=iloc,cf=py2cpp(cf[0])[0],res=result[0])
+ result = tenTemplate.format(iloc=iloc,cf=py2cpp(cf)[0],res=result[0])
else :
print 'unknown spin for off-shell particle',vertex.lorentz[0].spins[iloc-1]
quit()
# check if momenta defns needed to clean up compile of code
for (key,val) in defns.iteritems() :
if( isinstance(key, basestring)) :
if(key.find("vvP")==0) :
momenta[int(key[3])-1][0] = True
else :
for vals in key :
if(vals.type=="P") :
momenta[vals.value-1][0] = True
# cat the definitions
defString=""
for (key,value) in defns.iteritems() :
defString+=" %s\n" %value[1]
sorder=swapOrder(vertex,iloc,momenta,fIndex)
momentastring=""
for i in range(0,len(momenta)) :
if(momenta[i][0] and momenta[i][1]!="") :
momentastring+=momenta[i][1]+"\n "
# special for 4-point VVVV
if(vertex.lorentz[0].spins.count(3)==4 and iloc==0) :
sig=sig.replace("Energy2","Energy2,int")
header="virtual %s" % sig
sig=sig.replace("=-GeV","")
symboldefs = [ def_from_model(model,s) for s in symbols ]
function = evaluateTemplate.format(decl=sig,momenta=momentastring,defns=defString,
waves="\n ".join(waves),symbols='\n '.join(symboldefs),
couplings="\n ".join(localCouplings),
result=result,swap=sorder)
# special for transpose in the RS case
if(FM and RS) :
htemp = header.split(",")
irs=-1
isp=-1
for i in range(0,len(htemp)) :
if(htemp[i].find("RS")>0) :
if(htemp[i].find("Bar")>0) :
htemp[i]=htemp[i].replace("Bar","").replace("RsbarW","RsW")
else :
htemp[i]=htemp[i].replace("Spinor","SpinorBar").replace("RsW","RsbarW")
if(i>0) : irs=i
elif(htemp[i].find("Spinor")>0) :
if(htemp[i].find("Bar")>0) :
htemp[i]=htemp[i].replace("Bar","").replace("sbarW","sW")
else :
htemp[i]=htemp[i].replace("Spinor","SpinorBar").replace("sW","sbarW")
if(i>0) : isp=i
if(irs>0 and isp >0) :
htemp[irs],htemp[isp] = htemp[isp],htemp[irs]
hnew = ','.join(htemp)
header += ";\n" + hnew
hnew = hnew.replace("virtual ","").replace("=-GeV","")
for i in range(0,len(waves)) :
if(waves[i].find("Spinor")<0) : continue
if(waves[i].find("Bar")>0) :
waves[i] = waves[i].replace("Bar","").replace("bar","")
else :
waves[i] = waves[i].replace("Spinor","SpinorBar").replace(" s"," sbar").replace("Rs","Rsbar")
momentastring=""
for i in range(0,len(momenta)) :
if(momenta[i][0] and momenta[i][1]!="") :
if(momenta[i][1].find("barW")>0) :
momentastring+=momenta[i][1].replace("barW","W")+"\n "
elif(momenta[i][1].find("sW")>0) :
momentastring+=momenta[i][1].replace("sW","sbarW")+"\n "
else :
momentastring+=momenta[i][1]+"\n "
fnew = evaluateTemplate.format(decl=hnew,momenta=momentastring,defns=defString,
waves="\n ".join(waves),symbols='\n '.join(symboldefs),
couplings="\n ".join(localCouplings),
result=result[1],swap=sorder)
function +="\n" + fnew
return (header,function)
evaluateMultiple = """\
{decl} {{
{code}
}}
"""
def multipleEvaluate(vertex,spin,defns) :
if(spin==1) :
name="scaW"
elif(spin==3) :
name="vW"
else :
print 'testing evaluate multiple problem',spin
quit()
if(len(defns)==0) : return ("","")
header = defns[0]
ccdefn = header.replace("=-GeV","").replace("virtual ","").replace("Energy2","Energy2 q2")
code=""
spins=vertex.lorentz[0].spins
iloc=1
waves=[]
for i in range(0,len(spins)) :
if(spins[i]==spin) :
waves.append("%s%s" %(name,i+1))
for i in range(0,len(spins)) :
if(spins[i]==spin) :
if(iloc==1) : el=""
else : el="else "
call = defns[iloc].replace("virtual","").replace("ScalarWaveFunction","").replace("SpinorWaveFunction","") \
.replace("SpinorBarWaveFunction","").replace("VectorWaveFunction","").replace("TensorWaveFunction","") \
- .replace("Energy2","q2").replace("int","").replace("complex<Energy>","").replace("=-GeV","") \
+ .replace("Energy2","q2").replace("int","").replace("complex<Energy>","").replace("Energy","").replace("=-GeV","") \
.replace("const &","").replace("tcPDPtr","").replace(" "," ")
if(iloc!=1) :
call = call.replace(waves[0],waves[iloc-1])
pdgid = vertex.particles[i].pdg_code
code += " %sif(out->id()==%s) return %s;\n" % (el,pdgid,call)
iloc+=1
code+=" else assert(false);\n"
return (header,evaluateMultiple.format(decl=ccdefn,code=code))
diff --git a/Models/Feynrules/python/ufo2peg/vertices.py b/Models/Feynrules/python/ufo2peg/vertices.py
--- a/Models/Feynrules/python/ufo2peg/vertices.py
+++ b/Models/Feynrules/python/ufo2peg/vertices.py
@@ -1,828 +1,828 @@
import sys,pprint
from .helpers import CheckUnique,getTemplate,writeFile,coupling_orders,def_from_model
from .converter import py2cpp
from .collapse_vertices import collapse_vertices
from .check_lorentz import tensorCouplings,VVVordering,lorentzScalar,\
processTensorCouplings,scalarCouplings,processScalarCouplings,scalarVectorCouplings,\
processScalarVectorCouplings,vectorCouplings,processVectorCouplings,fermionCouplings,processFermionCouplings,\
RSCouplings,convertLorentz,generateEvaluateFunction,multipleEvaluate
from .helpers import SkipThisVertex,extractAntiSymmetricIndices,isGoldstone
# prefactors for vertices
lfactors = {
'FFV' : '-complex(0,1)', # ok
'VVV' : 'complex(0,1)', # changed to fix ttbar
'VVVS' : 'complex(0,1)', # should be as VVV
'VVVV' : 'complex(0,1)',
'VVS' : '-complex(0,1)',
'VSS' : '-complex(0,1)', # changed to minus to fix dL ->x1 W- d
'SSS' : '-complex(0,1)', # ok
'VVSS' : '-complex(0,1)', # ok
'VVT' : 'complex(0,2)',
'VVVT' : '-complex(0,2)',
'SSSS' : '-complex(0,1)', # ok
'FFS' : '-complex(0,1)', # ok
'SST' : 'complex(0,2)',
'FFT' : '-complex(0,8)',
'FFVT' : '-complex(0,4)',
'RFS' : 'complex(0,1)',
'RFV' : 'complex(0,1)',
}
-genericVertices=['FFFF','FFVV','FFSS','FFVS','VVVV']
+genericVertices=['FFFF','FFVV','FFSS','FFVS','VVVV','VVVT','FFVT','VVSS']
skipped5Point=False
# template for the header for a vertex
VERTEXHEADER = """\
#include "ThePEG/Helicity/Vertex/{spindirectory}/{lorentztag}Vertex.h"
"""
GENERALVERTEXHEADER = """\
#include "ThePEG/Helicity/Vertex/Abstract{lorentztag}Vertex.h"
"""
# template for the implmentation for a vertex
VERTEXCLASS = getTemplate('Vertex_class')
GENERALVERTEXCLASS = getTemplate('GeneralVertex_class')
# template for the .cc file for vertices
VERTEX = getTemplate('Vertex.cc')
vertexline = """\
create Herwig::FRModel{classname} /Herwig/{modelname}/{classname}
insert {modelname}:ExtraVertices 0 /Herwig/{modelname}/{classname}
"""
def get_lorentztag(spin):
"""Produce a ThePEG spin tag for the given numeric FR spins."""
spins = { 1 : 'S', 2 : 'F', 3 : 'V', 4 : 'R', 5 : 'T', -1 : 'U' }
result=[]
for i in range(0,len(spin)) :
result.append((spins[spin[i]],i+1))
def spinsort(a,b):
"""Helper function for ThePEG's FVST spin tag ordering."""
(a1,a2) = a
(b1,b2) = b
if a1 == b1: return 0
for letter in 'URFVST':
if a1 == letter: return -1
if b1 == letter: return 1
result = sorted(result, cmp=spinsort)
order=[]
output=""
for i in range(0,len(result)) :
(a,b) = result[i]
order.append(b)
output+=a
return (output,order)
def unique_lorentztag(vertex):
"""Check and return the Lorentz tag of the vertex."""
unique = CheckUnique()
for l in vertex.lorentz:
(lorentztag,order) = get_lorentztag(l.spins)
unique( lorentztag )
lname = l.name[:len(lorentztag)]
if sorted(lorentztag) != sorted(lname):
raise Exception("Lorentztags: %s is not %s in %s"
% (lorentztag,lname,vertex))
return (lorentztag,order)
def colors(vertex) :
try:
unique = CheckUnique()
for pl in vertex.particles_list:
struct = [ p.color for p in pl ]
unique(struct)
except:
struct = [ p.color for p in vertex.particles ]
pos = colorpositions(struct)
L = len(struct)
return (L,pos)
def coloursort(a,b) :
if a == b: return 0
i1=int(a[4])
i2=int(b[4])
if(i1==i2) : return 0
elif(i1<i2) : return -1
else : return 1
def colorfactor(vertex,L,pos,lorentztag):
def match(patterns,color=vertex.color):
result = [ p == t
for p,t in zip(patterns,color) ]
return all(result)
label = None
l = lambda c: len(pos[c])
if l(1) == L:
label = ('1',)
if match(label): return ("SINGLET",('1.',))
elif l(3) == l(-3) == 1 and l(1) == L-2:
nums = [pos[3][0], pos[-3][0]]
label = ('Identity({0},{1})'.format(*sorted(nums)),)
if match(label): return ("DELTA",('1.',))
elif l(6) == l(-6) == 1 and l(1) == L-2:
nums = [pos[6][0], pos[-6][0]]
label = ('Identity({0},{1})'.format(*sorted(nums)),)
if match(label): return ("DELTA",('1.',))
elif l(6) == l(-6) == 2 and L==4:
sys.stderr.write(
'Warning: Unknown colour structure 6 6 6~ 6~ ( {ps} ) in {name}.\n'
.format(name=vertex.name, ps=' '.join(map(str,vertex.particles)))
)
raise SkipThisVertex()
elif l(8) == l(3) == l(-3) == 1 and l(1) == L-3:
label = ('T({g},{q},{qb})'.format(g=pos[8][0],q=pos[3][0],qb=pos[-3][0]),)
if match(label): return ("SU3TFUND",('1.',))
elif l(8) == l(6) == l(-6) == 1 and l(1) == L-3:
label = ('T6({g},{s},{sb})'.format(g=pos[8][0],s=pos[6][0],sb=pos[-6][0]),)
if match(label): return ("SU3T6",('1.',))
elif l(6) == 1 and l(-3) == 2 and L==3:
label = ('K6({s},{qb1},{qb2})'.format(s=pos[6][0],qb1=pos[-3][0],qb2=pos[-3][1]),)
if match(label): return ("K6",('1.',))
elif l(-6) == 1 and l(3) == 2 and L==3:
label = ('K6Bar({sb},{q1},{q2})'.format(sb=pos[-6][0],q1=pos[3][0],q2=pos[3][1]),)
if match(label): return ("K6",('1.',))
elif l(3) == L == 3:
colors=[]
for color in vertex.color :
order,sign = extractAntiSymmetricIndices(color,"Epsilon(")
colors.append("Epsilon(%s,%s,%s)" % (order[0],order[1],order[2]))
label = ('Epsilon(1,2,3)',)
if match(label,colors): return ("EPS",('1.',)) # TODO check factor!
elif l(-3) == L == 3:
colors=[]
for color in vertex.color :
order,sign = extractAntiSymmetricIndices(color,"EpsilonBar(")
colors.append("Epsilon(%s,%s,%s)" % (order[0],order[1],order[2]))
label = ('EpsilonBar(1,2,3)',)
if match(label): return ("EPS",('1.',)) # TODO check factor!
elif l(8) == L == 3:
colors=[]
for color in vertex.color :
order,sign = extractAntiSymmetricIndices(color,"f(")
colors.append("f(%s,%s,%s)" % (order[0],order[1],order[2]))
# if lorentz is FFV get extra minus sign
if lorentztag in ['FFV'] : sign *=-1
label = ('f(1,2,3)',)
if match(label,colors): return ("SU3F",('-complex(0,1.)*(%s)'%sign,))
elif l(8) == L == 4:
colors=[]
for color in vertex.color :
f = color.split("*")
(o1,s1) = extractAntiSymmetricIndices(f[0],"f(")
(o2,s2) = extractAntiSymmetricIndices(f[1],"f(")
if(o2[0]<o1[0]) : o1,o2=o2,o1
colors.append("f(%s)*f(%s)" % (",".join(o1),",".join(o2)))
colors=sorted(colors,cmp=coloursort)
label = ('f(1,2,-1)*f(3,4,-1)',
'f(1,3,-1)*f(2,4,-1)',
'f(1,4,-1)*f(2,3,-1)')
nmatch=0
for c1 in label:
for c2 in colors :
if(c1==c2) : nmatch+=1
if(nmatch==2 and lorentztag=="VVSS") :
return ("SU3TTFUND",('1.','1.'))
elif(nmatch==3 and lorentztag=="VVVV") :
return ("SU3FF",('1.','1.','1.'))
elif l(8) == 2 and l(3) == l(-3) == 1 and L==4:
subs = {
'g1' : pos[8][0],
'g2' : pos[8][1],
'qq' : pos[3][0],
'qb' : pos[-3][0]
}
if(vertex.lorentz[0].spins.count(1)==2) :
label = ('T({g1},-1,{qb})*T({g2},{qq},-1)'.format(**subs),
'T({g1},{qq},-1)*T({g2},-1,{qb})'.format(**subs))
if match(label): return ("SU3TTFUNDS",('1.','1.'))
elif(vertex.lorentz[0].spins.count(2)==2) :
label = ('f({g1},{g2},-1)*T(-1,{qq},{qb})'.format(**subs),)
if match(label): return ("SU3TTFUNDD",('-complex(0.,1.)',))
label = ('f(-1,{g1},{g2})*T(-1,{qq},{qb})'.format(**subs),)
if match(label): return ("SU3TTFUNDD",('-complex(0.,1.)',))
elif l(8) == 2 and l(6) == l(-6) == 1 and L==4:
subs = {
'g1' : pos[8][0],
'g2' : pos[8][1],
'qq' : pos[6][0],
'qb' : pos[-6][0]
}
label = ('T6({g1},-1,{qb})*T6({g2},{qq},-1)'.format(**subs),
'T6({g1},{qq},-1)*T6({g2},-1,{qb})'.format(**subs))
if match(label): return ("SU3TT6",('1.','1.'))
elif l(8) == 2 and l(8)+l(1)==L :
subs = { 'g1' : pos[8][0], 'g2' : pos[8][1] }
label = ('Identity({g1},{g2})'.format(**subs),)
if match(label) : return ("DELTA",('1.',))
elif l(8) == 3 and l(1)==1 and L==4 :
colors=[]
for color in vertex.color :
order,sign = extractAntiSymmetricIndices(color,"f(")
colors.append("f(%s,%s,%s)" % (order[0],order[1],order[2]))
label = ('f(1,2,3)',)
if match(label,colors): return ("SU3F",('-complex(0.,1.)*(%s)'%sign,))
elif l(3)==2 and l(-3) == 2 and L==4 and lorentztag=="FFFF" :
labels=["Identity(1,2)*Identity(3,4)",
"Identity(1,4)*Identity(2,3)",
"T(-1,2,1)*T(-1,4,3)",
"T(-1,2,3)*T(-1,4,1)"]
cstruct=["SU3I12I34","SU3I14I23","SU3T21T43","SU3T23T41"]
oname=[]
ovalue=[]
for color in vertex.color :
for i in range(0,len(labels)) :
if labels[i]==color : break
if(i<len(labels)) :
oname.append(cstruct[i])
ovalue.append("1.")
else :
sys.stderr.write(
"Warning: Unknown colour structure {color} ( {ps} ) in {name} for FFFF vertex.\n"
.format(color = ' '.join(vertex.color), name = vertex.name,
ps = ' '.join(map(str,vertex.particles)))
)
raise SkipThisVertex()
return(oname,ovalue)
sys.stderr.write(
"Warning: Unknown colour structure {color} ( {ps} ) in {name}.\n"
.format(color = ' '.join(vertex.color), name = vertex.name,
ps = ' '.join(map(str,vertex.particles)))
)
raise SkipThisVertex()
def colorpositions(struct):
positions = {
1 : [],
3 : [],
-3 : [],
6 : [],
-6 : [],
8 : [],
}
for i,s in enumerate(struct,1):
positions[s].append(i)
return positions
def spindirectory(lt):
"""Return the spin directory name for a given Lorentz tag."""
if 'T' in lt:
spin_directory = 'Tensor'
elif 'S' in lt:
spin_directory = 'Scalar'
elif 'V' in lt:
spin_directory = 'Vector'
else:
raise Exception("Unknown Lorentz tag {lt}.".format(lt=lt))
return spin_directory
def write_vertex_file(subs):
'Write the .cc file for some vertices'
newname = '%s_Vertices_%03d.cc' % (subs['ModelName'],subs['vertexnumber'])
subs['newname'] = newname
writeFile( newname, VERTEX.substitute(subs) )
def checkGhostGoldstoneVertex(lorentztag,vertex) :
'check if vertex has ghosts or goldstones'
# remove vertices involving ghost fields
if 'U' in lorentztag:
return True
# remove vertices involving goldstones
for p in vertex.particles:
if(isGoldstone(p)):
return True
return False
def calculatePrefactor(lf,cf) :
prefactor = '(%s) * (%s)' % (lf,cf)
return prefactor
def couplingValue(coupling) :
if type(coupling) is not list:
value = coupling.value
else:
value = "("
for coup in coupling :
value += '+(%s)' % coup.value
value +=")"
return value
def epsilonSign(vertex,couplingptrs,append) :
EPSSIGN = """\
double sign = {epssign};
if((p1->id()=={id1} && p2->id()=={id3} && p3->id()=={id2}) ||
(p1->id()=={id2} && p2->id()=={id1} && p3->id()=={id3}) ||
(p1->id()=={id3} && p2->id()=={id2} && p3->id()=={id1})) {{
sign *= -1.;
}}
norm(norm()*sign);
"""
if(not "p1" in couplingptrs[0]) :
couplingptrs[0] += ' p1'
if(not "p2" in couplingptrs[1]) :
couplingptrs[1] += ' p2'
if(not "p3" in couplingptrs[2]) :
couplingptrs[2] += ' p3'
if("Bar" not in vertex.color[0]) :
order,sign = extractAntiSymmetricIndices(vertex.color[0],"Epsilon(")
else :
order,sign = extractAntiSymmetricIndices(vertex.color[0],"EpsilonBar(")
subs = {"id1" : vertex.particles[int(order[0])-1].pdg_code,
"id2" : vertex.particles[int(order[1])-1].pdg_code,
"id3" : vertex.particles[int(order[2])-1].pdg_code,
"epssign" : sign }
append+=EPSSIGN.format(**subs)
return couplingptrs,append
class VertexConverter:
'Convert the vertices in a FR model to extract the information ThePEG needs.'
def __init__(self,model,parmsubs,defns) :
'Initialize the parameters'
self.verbose=False
self.vertex_skipped=False
self.ignore_skipped=False
self.model=model
self.all_vertices= []
self.vertex_names = {}
self.modelname=""
self.no_generic_loop_vertices = False
self.parmsubs = parmsubs
self.couplingDefns = defns
def readArgs(self,args) :
'Extract the relevant command line arguments'
self.ignore_skipped = args.ignore_skipped
self.verbose = args.verbose
self.modelname = args.name
self.no_generic_loop_vertices = args.no_generic_loop_vertices
self.include_generic = args.include_generic
def should_print(self) :
'Check if we should output the results'
return not self.vertex_skipped or self.ignore_skipped
def convert(self) :
'Convert the vertices'
if(self.verbose) :
print 'verbose mode on: printing all vertices'
print '-'*60
labels = ('vertex', 'particles', 'Lorentz', 'C_L', 'C_R', 'norm')
pprint.pprint(labels)
# extract the vertices
self.all_vertices = self.model.all_vertices
# convert the vertices
vertexclasses, vertexheaders = [], set()
for vertexnumber,vertex in enumerate(self.all_vertices,1) :
# process the vertex
(skip,vertexClass,vertexHeader) = \
self.processVertex(vertexnumber,vertex)
# check it can be handled
if(skip) : continue
# add to the list
vertexclasses.append(vertexClass)
vertexheaders.add(vertexHeader)
WRAP = 25
if vertexnumber % WRAP == 0:
write_vertex_file({'vertexnumber' : vertexnumber//WRAP,
'vertexclasses' : '\n'.join(vertexclasses),
'vertexheaders' : ''.join(vertexheaders),
'ModelName' : self.modelname})
vertexclasses = []
vertexheaders = set()
# exit if there's vertices we can't handle
if not self.should_print():
sys.stderr.write(
"""
Error: The conversion was unsuccessful, some vertices could not be
generated. If you think the missing vertices are not important
and want to go ahead anyway, use --ignore-skipped.
Herwig may not give correct results, though.
"""
)
sys.exit(1)
# if still stuff to output it do it
if vertexclasses:
write_vertex_file({'vertexnumber' : vertexnumber//WRAP + 1,
'vertexclasses' : '\n'.join(vertexclasses),
'vertexheaders' : ''.join(vertexheaders),
'ModelName' : self.modelname})
print '='*60
def setCouplingPtrs(self,lorentztag,qcd,append,prepend) :
couplingptrs = [',tcPDPtr']*len(lorentztag)
if lorentztag == 'VSS':
couplingptrs[1] += ' p2'
elif lorentztag == 'FFV':
couplingptrs[0] += ' p1'
elif (lorentztag == 'VVV' or lorentztag == 'VVVS' or
lorentztag == "SSS" or lorentztag == "VVVT" ) \
and (append or prepend ) :
couplingptrs[0] += ' p1'
couplingptrs[1] += ' p2'
couplingptrs[2] += ' p3'
elif (lorentztag == 'VVVV' and qcd < 2) or\
(lorentztag == "SSSS" and prepend ):
couplingptrs[0] += ' p1'
couplingptrs[1] += ' p2'
couplingptrs[2] += ' p3'
couplingptrs[3] += ' p4'
return couplingptrs
def processVertex(self,vertexnumber,vertex) :
global skipped5Point
# get the Lorentz tag for the vertex
lorentztag,order = unique_lorentztag(vertex)
print "START OF VERTEX",vertex,lorentztag,order,vertex.particles
# check if we should skip the vertex
vertex.herwig_skip_vertex = checkGhostGoldstoneVertex(lorentztag,vertex)
# check the order of the vertex and skip 5 points
if(len(lorentztag)>=5) :
vertex.herwig_skip_vertex = True
if(not skipped5Point) :
skipped5Point = True
print "Skipping 5 point vertices which aren\'t used in Herwig7"
if(vertex.herwig_skip_vertex) :
return (True,"","")
# check if we support this at all
if( lorentztag not in lfactors and
lorentztag not in genericVertices) :
msg = 'Warning: Lorentz structure {tag} ( {ps} ) in {name} ' \
'is not supported.\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
# get the factor for the vertex
generic = False
try:
lf = lfactors[lorentztag]
- if "SST" in lorentztag :
+ if "SST" in lorentztag or "VVT" in lorentztag :
raise KeyError
except KeyError:
if(not self.include_generic) :
msg = 'Warning: Lorentz structure {tag} ( {ps} ) in {name} ' \
'is not supported.\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
else :
lf=1.
generic=True
# get the ids of the particles at the vertex
plistarray = [ ','.join([ str(vertex.particles[o-1].pdg_code) for o in order ]) ]
# parse the colour structure for the vertex
try:
L,pos = colors(vertex)
cs,cf = colorfactor(vertex,L,pos,lorentztag)
except SkipThisVertex:
msg = 'Warning: Color structure for vertex ( {ps} ) in {name} ' \
'is not supported.\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
### classname
classname = 'V_%s' % vertex.name
if(not generic) :
try :
return self.extractGeneric(vertex,order,lorentztag,classname,plistarray,pos,lf,cf,cs)
except SkipThisVertex:
if(not self.include_generic) :
msg = 'Warning: Lorentz structure {tag} ( {ps} ) in {name} ' \
'is not supported, may have a non-perturbative form.\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
else :
try :
return self.extractGeneral(vertex,order,lorentztag,classname,plistarray,pos,cf,cs)
except SkipThisVertex:
msg = 'Warning: Lorentz structure {tag} ( {ps} ) in {name} ' \
'is not supported, may have a non-perturbative form.\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
else :
try :
return self.extractGeneral(vertex,order,lorentztag,classname,plistarray,pos,cf,cs)
except SkipThisVertex:
msg = 'Warning: Lorentz structure {tag} ( {ps} ) in {name} ' \
'is not supported, may have a non-perturbative form.\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
def extractGeneric(self,vertex,order,lorentztag,classname,plistarray,pos,lf,cf,cs) :
classes=""
headers=""
# identify the maximum colour flow and orders of the couplings
maxColour=0
couplingOrders=[]
self.vertex_names[vertex.name] = [classname]
for (color_idx,lorentz_idx),coupling in vertex.couplings.iteritems():
maxColour=max(maxColour,color_idx)
orders = coupling_orders(vertex, coupling, self.couplingDefns)
if(orders not in couplingOrders) : couplingOrders.append(orders)
# loop the order of the couplings
iorder = 0
for corder in couplingOrders :
iorder +=1
cname=classname
if(iorder!=1) :
cname= "%s_%s" % (classname,iorder)
self.vertex_names[vertex.name].append(cname)
header = ""
prepend=""
append=""
all_couplings=[]
for ix in range(0,maxColour+1) :
all_couplings.append([])
# loop over the colour structures
for colour in range(0,maxColour+1) :
for (color_idx,lorentz_idx),coupling in vertex.couplings.iteritems() :
# check colour structure and coupling order
if(color_idx!=colour) : continue
if(coupling_orders(vertex, coupling, self.couplingDefns)!=corder) : continue
# get the prefactor for the lorentz structure
L = vertex.lorentz[lorentz_idx]
prefactors = calculatePrefactor(lf,cf[color_idx])
# calculate the value of the coupling
value = couplingValue(coupling)
# handling of the different types of couplings
if lorentztag in ['FFS','FFV']:
all_couplings[color_idx] = fermionCouplings(value,prefactors,L,all_couplings[color_idx],order)
elif 'T' in lorentztag :
append, all_couplings[color_idx] = tensorCouplings(vertex,value,prefactors,L,lorentztag,pos,
all_couplings[color_idx],order)
elif 'R' in lorentztag :
all_couplings[color_idx] = RSCouplings(value,prefactors,L,all_couplings[color_idx],order)
elif lorentztag == 'VVS' or lorentztag == "VVSS" or lorentztag == "VSS" :
all_couplings[color_idx] = scalarVectorCouplings(value,prefactors,L,lorentztag,
all_couplings[color_idx],order)
elif lorentztag == "SSS" or lorentztag == "SSSS" :
prepend, header, all_couplings[color_idx] = scalarCouplings(vertex,value,prefactors,L,lorentztag,
all_couplings[color_idx],prepend,header)
elif "VVV" in lorentztag :
all_couplings[color_idx],append = vectorCouplings(vertex,value,prefactors,L,lorentztag,pos,
all_couplings[color_idx],append,corder["QCD"],order)
else:
raise SkipThisVertex()
# set the coupling ptrs in the setCoupling call
couplingptrs = self.setCouplingPtrs(lorentztag,corder["QCD"],append != '',prepend != '')
# final processing of the couplings
symbols = set()
if(lorentztag in ['FFS','FFV']) :
(normcontent,leftcontent,rightcontent,append) = processFermionCouplings(lorentztag,vertex,
self.model,self.parmsubs,
all_couplings,order)
elif('T' in lorentztag) :
(leftcontent,rightcontent,normcontent) = processTensorCouplings(lorentztag,vertex,self.model,
self.parmsubs,all_couplings,order)
elif(lorentztag=="SSS" or lorentztag=="SSSS") :
normcontent = processScalarCouplings(self.model,self.parmsubs,all_couplings)
elif(lorentztag=="VVS" or lorentztag =="VVSS" or lorentztag=="VSS") :
normcontent,append,lorentztag,header,sym = processScalarVectorCouplings(lorentztag,vertex,
self.model,self.parmsubs,
all_couplings,header,order)
symbols |=sym
elif("VVV" in lorentztag) :
normcontent,append,header =\
processVectorCouplings(lorentztag,vertex,self.model,self.parmsubs,all_couplings,append,header)
else :
SkipThisVertex()
### do we need left/right?
if 'FF' in lorentztag and lorentztag != "FFT":
#leftcalc = aStoStrongCoup(py2cpp(leftcontent)[0], paramstoreplace_, paramstoreplace_expressions_)
#rightcalc = aStoStrongCoup(py2cpp(rightcontent)[0], paramstoreplace_, paramstoreplace_expressions_)
leftcalc, sym = py2cpp(leftcontent)
symbols |= sym
rightcalc, sym = py2cpp(rightcontent)
symbols |= sym
left = 'left(' + leftcalc + ');'
right = 'right(' + rightcalc + ');'
else:
left = ''
right = ''
leftcalc = ''
rightcalc = ''
#normcalc = aStoStrongCoup(py2cpp(normcontent)[0], paramstoreplace_, paramstoreplace_expressions_)
normcalc, sym = py2cpp(normcontent)
symbols |= sym
# UFO is GeV by default
if lorentztag in ['VVS','SSS']:
normcalc = 'Complex((%s) * GeV / UnitRemoval::E)' % normcalc
elif lorentztag in ['GeneralVVS']:
normcalc = 'Complex(-(%s) * UnitRemoval::E / GeV )' % normcalc
elif lorentztag in ['FFT','VVT', 'SST', 'FFVT', 'VVVT' , 'VVVS' ]:
normcalc = 'Complex((%s) / GeV * UnitRemoval::E)' % normcalc
norm = 'norm(' + normcalc + ');'
# finally special handling for eps tensors
if(len(vertex.color)==1 and vertex.color[0].find("Epsilon")>=0) :
couplingptrs, append = epsilonSign(vertex,couplingptrs,append)
# define unkown symbols from the model
symboldefs = [ def_from_model(self.model,s) for s in symbols ]
couplingOrder=""
for coupName,coupVal in corder.iteritems() :
couplingOrder+=" orderInCoupling(CouplingType::%s,%s);\n" %(coupName,coupVal)
### assemble dictionary and fill template
subs = { 'lorentztag' : lorentztag, # ok
'classname' : cname, # ok
'symbolrefs' : '\n '.join(symboldefs),
'left' : left, # doesn't always exist in base
'right' : right, # doesn't always exist in base
'norm' : norm, # needs norm, too
'addToPlist' : '\n'.join([ 'addToList(%s);'%s for s in plistarray]),
'parameters' : '',
'couplingOrders' : couplingOrder,
'colourStructure' : cs,
'couplingptrs' : ''.join(couplingptrs),
'spindirectory' : spindirectory(lorentztag),
'ModelName' : self.modelname,
'prepend' : prepend,
'append' : append,
'header' : header
} # ok
# print info if required
if self.verbose:
print '-'*60
pprint.pprint(( classname, plistarray, leftcalc, rightcalc, normcalc ))
headers+=VERTEXHEADER.format(**subs)
classes+=VERTEXCLASS.substitute(subs)
return (False,classes,headers)
def extractGeneral(self,vertex,order,lorentztag,classname,plistarray,pos,cf,cs) :
eps=False
classes=""
headers=""
# check the colour flows, three cases supported either 1 flow or 3 in gggg
# or multiple wierd ones in FFFF
cidx=-1
gluon4point = (len(pos[8])==4 and vertex.lorentz[0].spins.count(3)==4)
FFFF = (len(pos[3])==2 and len(pos[-3])==2 and vertex.lorentz[0].spins.count(2)==4)
couplingOrders=[]
colours={}
for (color_idx,lorentz_idx),coupling in vertex.couplings.iteritems() :
orders = coupling_orders(vertex, coupling, self.couplingDefns)
if(orders not in couplingOrders) : couplingOrders.append(orders)
if(gluon4point) :
color = vertex.color[color_idx]
f = color.split("*")
(o1,s1) = extractAntiSymmetricIndices(f[0],"f(")
(o2,s2) = extractAntiSymmetricIndices(f[1],"f(")
if(o2[0]<o1[0]) : o1,o2=o2,o1
color = "f(%s)*f(%s)" % (",".join(o1),",".join(o2))
label = 'f(1,3,-1)*f(2,4,-1)'
if(label==color) :
cidx=color_idx
colours[cidx] = (cs,cf[cidx])
elif (FFFF) :
colours[color_idx] = (cs[color_idx],cf[color_idx])
else :
cidx=color_idx
if(color_idx!=0) :
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
msg = 'Warning: General spin structure code currently only '\
'supports 1 colour structure for {tag} ( {ps} ) in {name}\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
return (True,"","")
if(isinstance(cs,basestring)) :
colours[cidx] = (cs,cf[cidx])
else :
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
msg = 'Warning: General spin structure code currently only '\
'supports 1 colour structure for {tag} ( {ps} ) in {name}\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
return (True,"","")
if(len(colours)==0) :
msg = 'Warning: General spin structure code currently only '\
'supports 1 colour structure for {tag} ( {ps} ) in {name}\n'.format(tag=lorentztag, name=vertex.name,
ps=' '.join(map(str,vertex.particles)))
sys.stderr.write(msg)
vertex.herwig_skip_vertex = True
self.vertex_skipped=True
return (True,"","")
# loop over the different orders in the couplings
# and colour structures
iorder=0
self.vertex_names[vertex.name]=[classname]
for corder in couplingOrders :
for (cidx,(cstruct,cfactor)) in colours.iteritems() :
iorder +=1
cname=classname
if(iorder!=1) :
cname= "%s_%s" % (classname,iorder)
self.vertex_names[vertex.name].append(cname)
defns=[]
vertexEval=[]
values=[]
imax = len(vertex.particles)+1
if lorentztag in genericVertices :
imax=1
for (color_idx,lorentz_idx),coupling in vertex.couplings.iteritems() :
# only the colour structre and coupling order we want
if(color_idx != cidx) : continue
if(coupling_orders(vertex, coupling, self.couplingDefns)!=corder) : continue
# calculate the value of the coupling
values.append(couplingValue(coupling))
# now to convert the spin structures
for i in range(0,imax) :
if(len(defns)<i+1) :
defns.append({})
vertexEval.append([])
eps |= convertLorentz(vertex.lorentz[lorentz_idx],lorentztag,order,vertex,
i,defns[i],vertexEval[i])
# we can now generate the evaluate member functions
header=""
impls=""
spins=vertex.lorentz[0].spins
mult={}
for i in range(1,6) :
if( spins.count(i)>1 and i!=2) : mult[i] = []
for i in range(0,imax) :
(evalHeader,evalCC) = generateEvaluateFunction(self.model,vertex,i,values,defns[i],vertexEval[i],cfactor,order)
if(i!=0 and spins[i-1] in mult) :
if(len(mult[spins[i-1]])==0) : mult[spins[i-1]].append(evalHeader)
evalHeader=evalHeader.replace("evaluate(","evaluate%s(" % i)
evalCC =evalCC .replace("evaluate(","evaluate%s(" % i)
mult[spins[i-1]].append(evalHeader)
header+=" "+evalHeader+";\n"
impls+=evalCC
# combine the multiple defn if needed
for (key,val) in mult.iteritems() :
(evalHeader,evalCC) = multipleEvaluate(vertex,key,val)
if(evalHeader!="") : header += " "+evalHeader+";\n"
if(evalCC!="") : impls += evalCC
impls=impls.replace("evaluate", "FRModel%s::evaluate" % cname)
couplingOrder=""
for coupName,coupVal in corder.iteritems() :
couplingOrder+=" orderInCoupling(CouplingType::%s,%s);\n" %(coupName,coupVal)
### assemble dictionary and fill template
subs = { 'lorentztag' : lorentztag,
'classname' : cname,
'addToPlist' : '\n'.join([ 'addToList(%s);'%s for s in plistarray]),
'ModelName' : self.modelname,
'couplingOrders' : couplingOrder,
'colourStructure' : cstruct,
'evaldefs' : header,
'evalimpls' : impls}
newHeader = GENERALVERTEXHEADER.format(**subs)
if(eps) : newHeader +="#include \"ThePEG/Helicity/epsilon.h\"\n"
headers+=newHeader
classes+=GENERALVERTEXCLASS.substitute(subs)
return (False,classes,headers)
def get_vertices(self,libname):
vlist = ['library %s\n' % libname]
for v in self.all_vertices:
if v.herwig_skip_vertex: continue
for name in self.vertex_names[v.name] :
vlist.append( vertexline.format(modelname=self.modelname, classname=name) )
if( not self.no_generic_loop_vertices) :
vlist.append('insert {modelname}:ExtraVertices 0 /Herwig/{modelname}/V_GenericHPP\n'.format(modelname=self.modelname) )
vlist.append('insert {modelname}:ExtraVertices 0 /Herwig/{modelname}/V_GenericHGG\n'.format(modelname=self.modelname) )
return ''.join(vlist)

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