EvtHelAmp Class Reference

#include <EvtHelAmp.hh>

Inheritance diagram for EvtHelAmp:

Public Member Functions
	EvtHelAmp ()
virtual	~EvtHelAmp ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	init ()
void	initProbMax ()
void	decay (EvtParticle *p)
Public Member Functions inherited from EvtDecayAmp
void	makeDecay (EvtParticle *p)
void	setWeight (double weight)
void	vertex (const EvtComplex &amp)
void	vertex (int i1, const EvtComplex &amp)
void	vertex (int i1, int i2, const EvtComplex &amp)
void	vertex (int i1, int i2, int i3, const EvtComplex &amp)
void	vertex (int *i1, const EvtComplex &amp)
virtual	~EvtDecayAmp ()
Public Member Functions inherited from EvtDecayBase
virtual void	getName (std::string &name)=0
virtual void	decay (EvtParticle *p)=0
virtual void	makeDecay (EvtParticle *p)=0
virtual EvtDecayBase *	clone ()=0
virtual void	init ()
virtual void	initProbMax ()
virtual std::string	commandName ()
virtual void	command (std::string cmd)
double	getProbMax (double prob)
double	resetProbMax (double prob)
	EvtDecayBase ()
virtual	~EvtDecayBase ()
virtual bool	matchingDecay (const EvtDecayBase &other) const
EvtId	getParentId ()
double	getBranchingFraction ()
void	disableCheckQ ()
void	checkQ ()
int	getNDaug ()
EvtId *	getDaugs ()
EvtId	getDaug (int i)
int	getNArg ()
int	getPHOTOS ()
void	setPHOTOS ()
void	setVerbose ()
void	setSummary ()
double *	getArgs ()
std::string *	getArgsStr ()
double	getArg (int j)
std::string	getArgStr (int j)
std::string	getModelName ()
int	getDSum ()
int	summary ()
int	verbose ()
void	saveDecayInfo (EvtId ipar, int ndaug, EvtId *daug, int narg, std::vector< std::string > &args, std::string name, double brfr)
void	printSummary ()
void	setProbMax (double prbmx)
void	noProbMax ()
void	checkNArg (int a1, int a2=-1, int a3=-1, int a4=-1)
void	checkNDaug (int d1, int d2=-1)
void	checkSpinParent (EvtSpinType::spintype sp)
void	checkSpinDaughter (int d1, EvtSpinType::spintype sp)
virtual int	nRealDaughters ()

Additional Inherited Members
Static Public Member Functions inherited from EvtDecayBase
static void	findMasses (EvtParticle *p, int ndaugs, EvtId daugs[10], double masses[10])
static void	findMass (EvtParticle *p)
static double	findMaxMass (EvtParticle *p)
Protected Member Functions inherited from EvtDecayBase
bool	daugsDecayedByParentModel ()
Protected Attributes inherited from EvtDecayAmp
EvtAmp	_amp2
Protected Attributes inherited from EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 35 of file EvtHelAmp.hh.

Constructor & Destructor Documentation

EvtHelAmp()

EvtHelAmp::EvtHelAmp ( )

inline

Definition at line 39 of file EvtHelAmp.hh.

{}

Referenced by clone().

~EvtHelAmp()

EvtHelAmp::~EvtHelAmp ( )

virtual

Definition at line 37 of file EvtHelAmp.cc.

                      {
 
  delete _evalHelAmp;
 
}

Member Function Documentation

clone()

EvtDecayBase * EvtHelAmp::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 50 of file EvtHelAmp.cc.

                              {
 
  return new EvtHelAmp;
 
}

decay()

void EvtHelAmp::decay ( EvtParticle *  p )

virtual

Implements EvtDecayBase.

Definition at line 173 of file EvtHelAmp.cc.

                                    {
 
  //first generate simple phase space
  p->initializePhaseSpace(getNDaug(),getDaugs());
 
  _evalHelAmp->evalAmp(p,_amp2);
    
  return ;
 
}

getName()

void EvtHelAmp::getName ( std::string &  name )

virtual

Implements EvtDecayBase.

Definition at line 43 of file EvtHelAmp.cc.

                                            {
 
  model_name="HELAMP";     
 
}

init()

void EvtHelAmp::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 56 of file EvtHelAmp.cc.

                    {
 
  checkNDaug(2);
 
 
  //find out how many states each particle have
  int _nA=EvtSpinType::getSpinStates(EvtPDL::getSpinType(getParentId()));
  int _nB=EvtSpinType::getSpinStates(EvtPDL::getSpinType(getDaug(0)));
  int _nC=EvtSpinType::getSpinStates(EvtPDL::getSpinType(getDaug(1)));
 
  if (verbose()){
    report(INFO,"EvtGen")<<"_nA,_nB,_nC:"
             <<_nA<<","<<_nB<<","<<_nC<<endl;
  }
 
  //find out what 2 times the spin is
  int _JA2=EvtSpinType::getSpin2(EvtPDL::getSpinType(getParentId()));
  int _JB2=EvtSpinType::getSpin2(EvtPDL::getSpinType(getDaug(0)));
  int _JC2=EvtSpinType::getSpin2(EvtPDL::getSpinType(getDaug(1)));
 
  if (verbose()){
    report(INFO,"EvtGen")<<"_JA2,_JB2,_JC2:"
             <<_JA2<<","<<_JB2<<","<<_JC2<<endl;
  }
 
  //allocate memory
  int* _lambdaA2=new int[_nA];
  int* _lambdaB2=new int[_nB];
  int* _lambdaC2=new int[_nC];
 
  EvtComplexPtr* _HBC=new EvtComplexPtr[_nB];
  int ib,ic;
  for(ib=0;ib<_nB;ib++){
    _HBC[ib]=new EvtComplex[_nC];
  }
 
  int i;
  //find the allowed helicities (actually 2*times the helicity!)
  fillHelicity(_lambdaA2,_nA,_JA2,getParentId());
  fillHelicity(_lambdaB2,_nB,_JB2,getDaug(0));
  fillHelicity(_lambdaC2,_nC,_JC2,getDaug(1));
 
  if (verbose()){
    report(INFO,"EvtGen")<<"Helicity states of particle A:"<<endl;
    for(i=0;i<_nA;i++){
      report(INFO,"EvtGen")<<_lambdaA2[i]<<endl;
    }
 
    report(INFO,"EvtGen")<<"Helicity states of particle B:"<<endl;
    for(i=0;i<_nB;i++){
      report(INFO,"EvtGen")<<_lambdaB2[i]<<endl;
    }
 
    report(INFO,"EvtGen")<<"Helicity states of particle C:"<<endl;
    for(i=0;i<_nC;i++){
      report(INFO,"EvtGen")<<_lambdaC2[i]<<endl;
    }
  }
 
  //now read in the helicity amplitudes
 
  int argcounter=0;
 
  for(ib=0;ib<_nB;ib++){
    for(ic=0;ic<_nC;ic++){
      _HBC[ib][ic]=0.0;
      if (abs(_lambdaB2[ib]-_lambdaC2[ic])<=_JA2) argcounter+=2;
    }
  }
 
  checkNArg(argcounter);
 
  argcounter=0;
 
  for(ib=0;ib<_nB;ib++){
    for(ic=0;ic<_nC;ic++){
      if (abs(_lambdaB2[ib]-_lambdaC2[ic])<=_JA2) {
    _HBC[ib][ic]=getArg(argcounter)*exp(EvtComplex(0.0,getArg(argcounter+1)));;
    argcounter+=2;
    if (verbose()){
      report(INFO,"EvtGen")<<"_HBC["<<ib<<"]["<<ic<<"]="
                   <<_HBC[ib][ic]<<endl;
    }
      }
    }
  }
 
  _evalHelAmp=new EvtEvalHelAmp(EvtPDL::getSpinType(getParentId()),
                EvtPDL::getSpinType(getDaug(0)),
                EvtPDL::getSpinType(getDaug(1)),
                _HBC);
  
  // Note: these are not class data members but local variables.
  delete [] _lambdaA2;
  delete [] _lambdaB2;
  delete [] _lambdaC2;
  for(int ib=0;ib<_nB;ib++){
    delete [] _HBC[ib];
  }
  delete [] _HBC;  // _HBC is copied in ctor of EvtEvalHelAmp above.
 
}

initProbMax()

void EvtHelAmp::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 160 of file EvtHelAmp.cc.

                           {
 
  double maxprob=_evalHelAmp->probMax();
 
  if (verbose()){
    report(INFO,"EvtGen")<<"Calculated probmax"<<maxprob<<endl;
  }
 
  setProbMax(maxprob);
 
}

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The documentation for this class was generated from the following files:

• EvtHelAmp.hh
• EvtHelAmp.cc