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MadGraphTwoCut.cc
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MadGraphTwoCut.cc
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// -*- C++ -*-
//
// This is the implementation of the non-inlined, non-templated member
// functions of the MadGraphTwoCut class.
//
#include "MadGraphTwoCut.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/PDT/ParticleData.h"
#include "ThePEG/PDT/EnumParticles.h"
#include "ThePEG/Utilities/EnumIO.h"
#include "ThePEG/Cuts/Cuts.h"
#ifdef ThePEG_TEMPLATES_IN_CC_FILE
// #include "MadGraphTwoCut.tcc"
#endif
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
using namespace ThePEG;
MadGraphTwoCut::~MadGraphTwoCut() {}
Energy2 MadGraphTwoCut::minSij(tcPDPtr pi, tcPDPtr pj) const {
if ( !checkType(pi, pj) || cutType != INVMASS ) return 0.0*GeV2;
return sqr(theCut*GeV);
}
Energy2 MadGraphTwoCut::minTij(tcPDPtr pi, tcPDPtr po) const {
return 0.0*GeV2;
}
double MadGraphTwoCut::minDeltaR(tcPDPtr pi, tcPDPtr pj) const {
if ( !checkType(pi, pj) || cutType != DELTAR ) return 0.0;
return theCut;
}
Energy MadGraphTwoCut::minKTClus(tcPDPtr pi, tcPDPtr pj) const {
return 0.0*GeV;
}
double MadGraphTwoCut::minDurham(tcPDPtr pi, tcPDPtr pj) const {
return 0.0;
}
bool MadGraphTwoCut::passCuts(tcCutsPtr parent, tcPDPtr pitype, tcPDPtr pjtype,
LorentzMomentum pi, LorentzMomentum pj,
bool inci, bool incj) const {
if ( inci || incj || !checkType(pitype, pjtype) ) return true;
if ( cutType == INVMASS ) return (pi + pj).m2() > sqr(theCut*GeV);
if ( cutType == DELTAR ) {
double deta2 = sqr(pi.eta() - pj.eta());
double dphi = abs(pi.phi() - pi.phi());
if ( dphi > Constants::pi ) dphi = 2.0*Constants::pi - dphi;
return sqrt(deta2 + sqr(dphi)) > theCut;
}
return true;
}
MadGraphTwoCut::PType MadGraphTwoCut::getType(tcPDPtr p) const {
switch ( abs(p->id()) ) {
case ParticleID::d:
case ParticleID::u:
case ParticleID::s:
case ParticleID::c:
case ParticleID::g:
return JET;
case ParticleID::b:
return BOT;
case ParticleID::gamma:
return PHO;
case ParticleID::eminus:
case ParticleID::nu_e:
case ParticleID::muminus:
case ParticleID::nu_mu:
case ParticleID::tauminus:
case ParticleID::nu_tau:
return LEP;
default:
return NOT;
}
}
bool MadGraphTwoCut::checkType(tcPDPtr pi, tcPDPtr pj) const {
switch ( pairType ) {
case JETJET:
return getType(pi) == JET && getType(pj) == JET;
case LEPLEP:
if ( getType(pi) != LEP || getType(pj) != LEP ) return false;
if ( cutType == DELTAR ) return true;
// Special treatment for INVMASS.
if ( pi->id()*pj->id() >= 0 ) return false;
// OK we have a lepton-anti-lepton pair. I it the same lepton
if ( pi->id() == -pj->id() ) return true;
// NO, well is it the same family?
if ( max(abs(pi->id()), abs(pj->id()))%2 ) return false;
return abs(pi->id() + pj->id()) == 1 ;
case PHOPHO:
return getType(pi) == PHO && getType(pj) == PHO;
case BOTBOT:
return getType(pi) == BOT && getType(pj) == BOT;
case BOTJET:
return ( getType(pi) == BOT && getType(pj) == JET ) ||
( getType(pi) == JET && getType(pj) == BOT );
case PHOJET:
return ( getType(pi) == PHO && getType(pj) == JET ) ||
( getType(pi) == JET && getType(pj) == PHO );
case JETLEP:
return ( getType(pi) == LEP && getType(pj) == JET ) ||
( getType(pi) == JET && getType(pj) == LEP );
case PHOBOT:
return ( getType(pi) == PHO && getType(pj) == BOT ) ||
( getType(pi) == BOT && getType(pj) == PHO );
case BOTLEP:
return ( getType(pi) == BOT && getType(pj) == LEP ) ||
( getType(pi) == LEP && getType(pj) == BOT );
case PHOLEP:
return ( getType(pi) == PHO && getType(pj) == LEP ) ||
( getType(pi) == LEP && getType(pj) == PHO );
}
return false;
}
void MadGraphTwoCut::persistentOutput(PersistentOStream & os) const {
os << oenum(cutType) << oenum(pairType) << theCut;
}
void MadGraphTwoCut::persistentInput(PersistentIStream & is, int) {
is >> ienum(cutType) >> ienum(pairType) >> theCut;
}
ClassDescription<MadGraphTwoCut> MadGraphTwoCut::initMadGraphTwoCut;
// Definition of the static class description member.
void MadGraphTwoCut::Init() {
static ClassDocumentation<MadGraphTwoCut> documentation
("Objects of the MadGraphTwoCut class can be created automatically by "
"the MadGraphReader class when scanning event files for information "
"about cuts. It is also possible to create objects by hand and use "
"it as any other MadGraphTwoCut object.");
static Switch<MadGraphTwoCut,CutType> interfaceCutType
("CutType",
"The kind of cut this object will do.",
&MadGraphTwoCut::cutType, DELTAR, true, false);
static SwitchOption interfaceCutTypeInvariantMass
(interfaceCutType,
"InvariantMass",
"The minimum invariant mass of two particles.",
INVMASS);
static SwitchOption interfaceCutTypeDeltaR
(interfaceCutType,
"DeltaR",
"The minimum pseudo-rapidity--azimuth-angle distance between two "
"particles.",
DELTAR);
static Switch<MadGraphTwoCut,PPType> interfacePairType
("PairType",
"The type of particle pairs this cut is applied to.",
&MadGraphTwoCut::pairType, JETJET, true, false);
static SwitchOption interfacePairTypeJetJet
(interfacePairType,
"JetJet",
"The cut applies only to pairs of coloured particles (jets).",
JETJET);
static SwitchOption interfacePairTypeLeptonLepton
(interfacePairType,
"LeptonLepton",
"The cut applies only to lepton pairs (in case of invariant mass, "
"lepton--anti-lepton pairs of same flavour).",
LEPLEP);
static SwitchOption interfacePairTypePhotonPhoton
(interfacePairType,
"PhotonPhoton",
"The cut applies only to pairs photons.",
PHOPHO);
static SwitchOption interfacePairTypeBottomPairs
(interfacePairType,
"BottomPairs",
"The cut applies only to pairs of bottom quarks.",
BOTBOT);
static SwitchOption interfacePairTypeJetBottom
(interfacePairType,
"JetBottom",
"The cut applies only to bottom quarks paired with another coloured "
"particle (jet).",
BOTJET);
static SwitchOption interfacePairTypePhotonJet
(interfacePairType,
"PhotonJet",
"The cut applies only to a photon paired with a coloured particle (jet).",
PHOJET);
static SwitchOption interfacePairTypeJetLepton
(interfacePairType,
"JetLepton",
"The cut applies only to a coloured particle (jet) paired with a lepton.",
JETLEP);
static SwitchOption interfacePairTypePhotonBottom
(interfacePairType,
"PhotonBottom",
"The cut applies only to a photon paired with a bottom quark.",
PHOBOT);
static SwitchOption interfacePairTypeBottomLepton
(interfacePairType,
"BottomLepton",
"The cut applies only to bottom quarks paired with a lepton.",
BOTLEP);
static SwitchOption interfacePairTypePhotonLepton
(interfacePairType,
"PhotonLepton",
"The cut applies only to a photon paired with a lepton.",
PHOLEP);
static Parameter<MadGraphTwoCut,double> interfaceCut
("Cut",
"The value of the cut to be applied (in units of GeV in case of "
"minimum invariant mass).",
&MadGraphTwoCut::theCut, 0.0, 0.0, 0,
true, false, Interface::lowerlim);
}

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