EvtMelikhov.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: EvtMelikhov.cc
//
// Description: Routine to implement semileptonic B->D*lnu decays according
//              to the model HQET
//
// Modification history:
//
//    DJL     April 20, 1998        Module created
//
//------------------------------------------------------------------------
//
#include "EvtMelikhov.hh"
#include "../EvtGenBase/EvtGenKine.hh"
#include "../EvtGenBase/EvtPDL.hh"
#include "../EvtGenBase/EvtParticle.hh"
#include "../EvtGenBase/EvtPatches.hh"
#include "../EvtGenBase/EvtReport.hh"
#include "../EvtGenBase/EvtSemiLeptonicVectorAmp.hh"
#include "EvtMelikhovFF.hh"
#include <stdlib.h>
#include <string>
 
EvtMelikhov::~EvtMelikhov() {}
 
void EvtMelikhov::getName( std::string& model_name ) { model_name = "MELIKHOV"; }
 
EvtDecayBase* EvtMelikhov::clone() { return new EvtMelikhov; }
 
void EvtMelikhov::decay( EvtParticle* p ) {
 
  p->initializePhaseSpace( getNDaug(), getDaugs() );
  calcamp->CalcAmp( p, _amp2, Melikhovffmodel );
}
 
void EvtMelikhov::init() {
 
  checkNArg( 1 );
  checkNDaug( 3 );
 
  // We expect the parent to be a scalar
  // and the daughters to be X lepton neutrino
 
  checkSpinParent( EvtSpinType::SCALAR );
 
  checkSpinDaughter( 0, EvtSpinType::VECTOR );
  checkSpinDaughter( 1, EvtSpinType::DIRAC );
  checkSpinDaughter( 2, EvtSpinType::NEUTRINO );
 
  Melikhovffmodel = new EvtMelikhovFF( getArg( 0 ) );
  calcamp         = new EvtSemiLeptonicVectorAmp;
}