EvtDecayProb Class Reference

#include <EvtDecayProb.hh>

Inheritance diagram for EvtDecayProb:

Public Member Functions
void	makeDecay (EvtParticle *p)
void	setProb (double prob)
double	getProb ()
void	setWeight (double weight)
virtual	~EvtDecayProb ()
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 EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 28 of file EvtDecayProb.hh.

Constructor & Destructor Documentation

~EvtDecayProb()

virtual EvtDecayProb::~EvtDecayProb ( )

inlinevirtual

Definition at line 38 of file EvtDecayProb.hh.

{}

Member Function Documentation

getProb()

double EvtDecayProb::getProb ( )

inline

Definition at line 35 of file EvtDecayProb.hh.

{ return _prob;}

makeDecay()

void EvtDecayProb::makeDecay ( EvtParticle *  p )

virtual

Implements EvtDecayBase.

Definition at line 31 of file EvtDecayProb.cc.

                                          {
 
  int ntimes=10000;
 
  double dummy;
 
  do{
    _weight=1.0;
    _daugsDecayedByParentModel=false;
 
    decay(p);
    //report(INFO,"EvtGen") << _weight << endl;
    ntimes--;
    
    _prob = _prob/_weight;
    
    dummy=getProbMax(_prob)*EvtRandom::Flat();
    p->setDecayProb(_prob/getProbMax(_prob));
    //  report(INFO,"EvtGen") << _prob <<" "<<dummy<<" "<<ntimes<<endl;
  }while(ntimes&&(_prob<dummy));
  //report(INFO,"EvtGen") << ntimes <<endl;
  if (ntimes==0){
    report(DEBUG,"EvtGen") << "Tried accept/reject:10000"
               <<" times, and rejected all the times!"<<endl;
    report(DEBUG,"EvtGen") << "Is therefore accepting the last event!"<<endl;
    report(DEBUG,"EvtGen") << "Decay of particle:"<<
      EvtPDL::name(p->getId()).c_str()<<"(channel:"<<
      p->getChannel()<<") with mass "<<p->mass()<<endl;
    
    int ii;
    for(ii=0;ii<p->getNDaug();ii++){
      report(DEBUG,"EvtGen") <<"Daughter "<<ii<<":"<<
    EvtPDL::name(p->getDaug(ii)->getId()).c_str()<<" with mass "<<
    p->getDaug(ii)->mass()<<endl;
    }                  
  }
 
 
  EvtSpinDensity rho;
  rho.SetDiag(p->getSpinStates());
  p->setSpinDensityBackward(rho);
  if (getPHOTOS() || EvtRadCorr::alwaysRadCorr()) {
    EvtRadCorr::doRadCorr(p);
  }
 
 
  //Now decay the daughters.
  if ( !daugsDecayedByParentModel()) {
    int i;
    for(i=0;i<p->getNDaug();i++){
      //Need to set the spin density of the daughters to be
      //diagonal.
      rho.SetDiag(p->getDaug(i)->getSpinStates());
      p->getDaug(i)->setSpinDensityForward(rho);
      
      //Now decay the daughter.  Really!
      p->getDaug(i)->decay();
    } 
  }
                
}

setProb()

void EvtDecayProb::setProb ( double  prob )

inline

Definition at line 34 of file EvtDecayProb.hh.

{ _prob=prob;}

Referenced by EvtBsquark::decay(), EvtFlatQ2::decay(), and EvtPi0Dalitz::decay().

setWeight()

void EvtDecayProb::setWeight ( double  weight )

inline

Definition at line 36 of file EvtDecayProb.hh.

{_weight=weight;}

Referenced by EvtPi0Dalitz::decay().

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

• EvtDecayProb.hh
• EvtDecayProb.cc