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EvtBToPlnuBKFF.cpp
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EvtBToPlnuBKFF.cpp
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//--------------------------------------------------------------------------
//
// Environment:
// This software is part of the EvtGen package developed jointly
// for the BaBar and CLEO collaborations. If you use all or part
// of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
// Copyright (C) 1998 Caltech, UCSB
//
// Module: EvtGenModels/EvtBToPlnuBK.cc
//
// Description: B->Xu l nu with BK (Becirevic-Kaidalov) parametrization
// Xu is a pseudoscalar (pi_plus,pi0,eta or eta_prime)
//
// Modification history:
//
// Martin Simard, U. de Montreal, 08/01/2007 Module created
//
//------------------------------------------------------------------------
//
#include "EvtGenBase/EvtPatches.hh"
#include "EvtGenBase/EvtPatches.hh"
#include "EvtGenBase/EvtReport.hh"
#include "EvtGenModels/EvtBToPlnuBKFF.hh"
#include "EvtGenBase/EvtId.hh"
#include <string>
#include "EvtGenBase/EvtPDL.hh"
#include <math.h>
#include <stdlib.h>
EvtBToPlnuBKFF::EvtBToPlnuBKFF(double alpha, double beta) {
_alpha = alpha;
_beta = beta;
return;
}
void EvtBToPlnuBKFF::getscalarff(EvtId parent,EvtId /*daught*/,
double t, double /*mass*/, double *fp, double *f0) {
//Define mBstar
EvtId Bplus = EvtPDL::getId("B+");
EvtId Bminus = EvtPDL::getId("B-");
double mBstar = EvtPDL::getMeanMass(EvtPDL::getId("B*0"));
if(parent==Bplus || parent==Bminus) mBstar = EvtPDL::getMeanMass(EvtPDL::getId("B*+"));
double mBstar2=mBstar*mBstar;
//Compute BK parametrization (t==q2)
double fplus=1.0/((1.0-t/mBstar2)*(1.0-_alpha*t/mBstar2));
double fzero=1.0/(1.0-t/(mBstar2*_beta));
*fp=fplus;
*f0=fzero;
return;
}
void EvtBToPlnuBKFF::getvectorff(EvtId, EvtId, double, double, double*,
double*, double*, double*){
EvtGenReport(EVTGEN_ERROR,"EvtGen") << "Not implemented :getvectorff in EvtBToPlnuBKFF.\n";
::abort();
}
void EvtBToPlnuBKFF::gettensorff(EvtId, EvtId, double, double, double*,
double*, double*, double*){
EvtGenReport(EVTGEN_ERROR,"EvtGen") << "Not implemented :gettensorff in EvtBToPlnuBKFf.\n";
::abort();
}
void EvtBToPlnuBKFF::getbaryonff(EvtId, EvtId, double, double, double*,
double*, double*, double*){
EvtGenReport(EVTGEN_ERROR,"EvtGen") << "Not implemented :getbaryonff in EvtBToPlnuBKFF.\n";
::abort();
}
void EvtBToPlnuBKFF::getdiracff(EvtId, EvtId, double, double, double*, double*,
double*, double*, double*, double*) {
EvtGenReport(EVTGEN_ERROR,"EvtGen") << "Not implemented :getdiracff in EvtBToPlnuBKFF.\n";
::abort();
}
void EvtBToPlnuBKFF::getraritaff(EvtId, EvtId, double, double, double*, double*,
double*, double*, double*, double*, double*, double*) {
EvtGenReport(EVTGEN_ERROR,"EvtGen") << "Not implemented :getraritaff in EvtBToPlnuBKFF.\n";
::abort();
}

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