EvtPartWave Class Reference

#include <EvtPartWave.hh>

Inheritance diagram for EvtPartWave:

Public Member Functions
	EvtPartWave ()
virtual	~EvtPartWave ()
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 31 of file EvtPartWave.hh.

Constructor & Destructor Documentation

EvtPartWave()

EvtPartWave::EvtPartWave ( )

inline

Definition at line 35 of file EvtPartWave.hh.

{}

Referenced by clone().

~EvtPartWave()

EvtPartWave::~EvtPartWave ( )

virtual

Definition at line 41 of file EvtPartWave.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtPartWave::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 50 of file EvtPartWave.cc.

                                {
 
  return new EvtPartWave;
 
}

decay()

void EvtPartWave::decay ( EvtParticle *  p )

virtual

Implements EvtDecayBase.

Definition at line 227 of file EvtPartWave.cc.

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

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 43 of file EvtPartWave.cc.

                                              {
 
  model_name="PARTWAVE";     
 
}

init()

void EvtPartWave::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 56 of file EvtPartWave.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);
  fillHelicity(_lambdaB2,_nB,_JB2);
  fillHelicity(_lambdaC2,_nC,_JC2);
 
  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;
    }
 
    report(INFO,"EvtGen")<<"Will now figure out the valid (M_LS) states:"<<endl;
 
  }
 
  int Lmin=std::max(_JA2-_JB2-_JC2,std::max(_JB2-_JA2-_JC2,_JC2-_JA2-_JB2));
  if (Lmin<0) Lmin=0;
  //int Lmin=_JA2-_JB2-_JC2;
  int Lmax=_JA2+_JB2+_JC2;
 
  int L;
 
  int _nPartialWaveAmp=0;
 
  int _nL[50];
  int _nS[50];
 
  for (L=Lmin;L<=Lmax;L+=2){
    int Smin=abs(L-_JA2);
    if (Smin<abs(_JB2-_JC2)) Smin=abs(_JB2-_JC2);
    int Smax=L+_JA2;
    if (Smax>abs(_JB2+_JC2)) Smax=abs(_JB2+_JC2);
    int S;
    for (S=Smin;S<=Smax;S+=2){
      _nL[_nPartialWaveAmp]=L;
      _nS[_nPartialWaveAmp]=S;
 
      _nPartialWaveAmp++;
      if (verbose()){
    report(INFO,"EvtGen")<<"M["<<L<<"]["<<S<<"]"<<endl;    
      }
    }
  }
 
  checkNArg(_nPartialWaveAmp*2);
 
  int argcounter=0;
 
  EvtComplex _M[50];
 
  for(i=0;i<_nPartialWaveAmp;i++){
    _M[i]=getArg(argcounter)*exp(EvtComplex(0.0,getArg(argcounter+1)));;
    argcounter+=2;
    if (verbose()){
      report(INFO,"EvtGen")<<"M["<<_nL[i]<<"]["<<_nS[i]<<"]="<<_M[i]<<endl;
    }
  }
 
  //Now calculate the helicity amplitudes
 
  
 
  for(ib=0;ib<_nB;ib++){
    for(ic=0;ic<_nC;ic++){
      _HBC[ib][ic]=0.0;
      if (abs(_lambdaB2[ib]-_lambdaC2[ic])<=_JA2){
    for(i=0;i<_nPartialWaveAmp;i++){
      int L=_nL[i];
      int S=_nS[i];
      int lambda2=_lambdaB2[ib];
      int lambda3=_lambdaC2[ic];
      int s1=_JA2;
      int s2=_JB2;
      int s3=_JC2;
      int m1=lambda2-lambda3;
      EvtCGCoefSingle c1(s2,s3);
      EvtCGCoefSingle c2(L,S);
 
      if (verbose()){
        report(INFO,"EvtGen") << "s2,lambda2:"<<s2<<" "<<lambda2<<endl;
      }
      //fkw changes to satisfy KCC
      double fkwTmp = (L+1.0)/(s1+1.0);
 
      if (S>=abs(m1)){
 
        EvtComplex tmp=sqrt(fkwTmp)
          *c1.coef(S,m1,s2,s3,lambda2,-lambda3)
          *c2.coef(s1,m1,L,S,0,m1)*_M[i];
        //fkw EvtComplex tmp=sqrt((L+1)/(s1+1))*c1.coef(S,m1,s2,s3,lambda2,-lambda3)*c2.coef(s1,m1,L,S,0,m1)*_M[i];
        _HBC[ib][ic]+=tmp;
      }
    }
    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);
 
 
}

initProbMax()

void EvtPartWave::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 214 of file EvtPartWave.cc.

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

---

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

• EvtPartWave.hh
• EvtPartWave.cc