EvtSingleParticle Class Reference

#include <EvtSingleParticle.hh>

Inheritance diagram for EvtSingleParticle:

Public Member Functions
	EvtSingleParticle ()
virtual	~EvtSingleParticle ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	decay (EvtParticle *p)
void	init ()
Public Member Functions inherited from EvtDecayIncoherent
void	makeDecay (EvtParticle *p)
virtual	~EvtDecayIncoherent ()
void	setDaughterSpinDensity (int daughter)
int	isDaughterSpinDensitySet (int daughter)
Public Member Functions inherited from EvtDecayBase
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 29 of file EvtSingleParticle.hh.

Constructor & Destructor Documentation

EvtSingleParticle()

EvtSingleParticle::EvtSingleParticle ( )

inline

Definition at line 33 of file EvtSingleParticle.hh.

{}

Referenced by clone().

~EvtSingleParticle()

EvtSingleParticle::~EvtSingleParticle ( )

virtual

Definition at line 32 of file EvtSingleParticle.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtSingleParticle::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 40 of file EvtSingleParticle.cc.

                                      {
 
  return new EvtSingleParticle();
 
}

decay()

void EvtSingleParticle::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 115 of file EvtSingleParticle.cc.

                                             {
 
  EvtParticle *d;
  EvtVector4R p4;
 
  double mass=EvtPDL::getMass(getDaug(0));
 
  p->makeDaughters(getNDaug(),getDaugs());
  d=p->getDaug(0);
 
  //generate flat distribution in p 
  //we are now in the parents restframe! This means the 
  //restframe of the e+e- collison.
  double pcm;
  if (pmin==pmax) pcm=pmin;  //pingrg, 2008-04-15
  if (pmin< pmax) pcm=EvtRandom::Flat(pmin,pmax);
 
  //generate flat distribution in phi.
  double phi;
  if(phimin==phimax) phi=phimin; //pingrg 2008-10-22
  else phi=EvtRandom::Flat(phimin,phimax);
  
  double cthetalab;
 
  do{
    //generate flat distribution in costheta
    double ctheta;
    if(cthetamin==cthetamax) ctheta=cthetamin;
    else ctheta=EvtRandom::Flat(cthetamin,cthetamax);
    double stheta=sqrt(1.0-ctheta*ctheta);
    p4.set(sqrt(mass*mass+pcm*pcm),pcm*cos(phi)*stheta,
       pcm*sin(phi)*stheta,pcm*ctheta);
 
    d->init( getDaug(0),p4);
 
    //get 4 vector in the lab frame!
    EvtVector4R p4lab=d->getP4Lab();
    cthetalab=p4lab.get(3)/p4lab.d3mag();
  }while (cthetalab>cthetamax||cthetalab<cthetamin);
 
  return ;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 34 of file EvtSingleParticle.cc.

                                                    {
 
  model_name="SINGLE";     
 
}

init()

void EvtSingleParticle::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 46 of file EvtSingleParticle.cc.

                            {
 
 
  //turn off checks for charge conservation
  disableCheckQ();
 
  if ((getNArg()==6)||(getNArg()==4)||(getNArg()==2)) {
    
    if (getNArg()==6){
      //copy the arguments into eaiser to remember names!
 
      pmin=getArg(0);
      pmax=getArg(1);
      
      cthetamin=getArg(2);
      cthetamax=getArg(3);
      
      phimin=getArg(4);
      phimax=getArg(5);
 
    }
 
    if (getNArg()==4){
      //copy the arguments into eaiser to remember names!
 
      pmin=getArg(0);
      pmax=getArg(1);
      
      cthetamin=getArg(2);
      cthetamax=getArg(3);
      
      phimin=0.0;
      phimax=EvtConst::twoPi;
 
    }
 
    if (getNArg()==2){
      //copy the arguments into eaiser to remember names!
 
      pmin=getArg(0);
      pmax=getArg(1);
      
      cthetamin=-1.0;
      cthetamax=1.0;
      
      phimin=0.0;
      phimax=EvtConst::twoPi;
 
    }
 
 
  }else{
    
    report(ERROR,"EvtGen") << "EvtSingleParticle generator expected "
                           << " 6, 4, or 2 arguments but found:"<<getNArg()<<endl;
    report(ERROR,"EvtGen") << "Will terminate execution!"<<endl;
    ::abort();
 
  }
 
 
  report(INFO,"EvtGen") << "The single particle generator has been configured:"
    <<endl;
  report(INFO,"EvtGen") << pmax << " > p > " << pmin <<endl;
  report(INFO,"EvtGen") << cthetamax << " > costheta > " << cthetamin <<endl;
  report(INFO,"EvtGen") << phimax << " > phi > " << phimin <<endl;
 
}

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

• EvtSingleParticle.hh
• EvtSingleParticle.cc