BesEvtGen-00-04-08/src/EvtGen/EvtGenModels/EvtSLPole.cc

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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: EvtSLPole.cc
//
// Description: Routine to implement semileptonic decays according
//              to light cone sum rules
//
// Modification history:
//
//    DJL       April 23, 1998       Module created
//
//------------------------------------------------------------------------
// 
#include "EvtGenBase/EvtPatches.hh"
#include <stdlib.h>
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtGenKine.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtReport.hh"
#include "EvtGenModels/EvtSLPole.hh"
#include "EvtGenModels/EvtSLPoleFF.hh"
#include "EvtGenBase/EvtSemiLeptonicScalarAmp.hh"
#include "EvtGenBase/EvtSemiLeptonicVectorAmp.hh"
#include "EvtGenBase/EvtSemiLeptonicTensorAmp.hh"
#include <string>
 
EvtSLPole::~EvtSLPole() {}
 
void EvtSLPole::getName(std::string& model_name){
 
  model_name="SLPOLE";     
 
}
 
 
EvtDecayBase* EvtSLPole::clone(){
 
  return new EvtSLPole;
 
}
 
void EvtSLPole::decay( EvtParticle *p ){
 
  p->initializePhaseSpace(getNDaug(),getDaugs());
 
  calcamp->CalcAmp(p,_amp2,SLPoleffmodel);
  return;
}
 
void EvtSLPole::initProbMax(){
 
EvtId parnum,mesnum,lnum,nunum;
 
parnum = getParentId();
mesnum = getDaug(0);
lnum = getDaug(1);
nunum = getDaug(2);
 
double mymaxprob = calcamp->CalcMaxProb(parnum,mesnum,
                           lnum,nunum,SLPoleffmodel);
 
setProbMax(mymaxprob);
 
}
 
 
void EvtSLPole::init(){
  
  checkNDaug(3);
 
  //We expect the parent to be a scalar 
  //and the daughters to be X lepton neutrino
 
  checkSpinParent(EvtSpinType::SCALAR);
  checkSpinDaughter(1,EvtSpinType::DIRAC);
  checkSpinDaughter(2,EvtSpinType::NEUTRINO);
 
  EvtSpinType::spintype mesontype=EvtPDL::getSpinType(getDaug(0));
 
  SLPoleffmodel = new EvtSLPoleFF(getNArg(),getArgs());
  
  if ( mesontype==EvtSpinType::SCALAR ) { 
    calcamp = new EvtSemiLeptonicScalarAmp; 
  }
  if ( mesontype==EvtSpinType::VECTOR ) { 
    calcamp = new EvtSemiLeptonicVectorAmp; 
  }
  if ( mesontype==EvtSpinType::TENSOR ) { 
    calcamp = new EvtSemiLeptonicTensorAmp; 
  }
  
}