EvtSingleParticle2 Class Reference

#include <EvtSingleParticle2.hh>

Inheritance diagram for EvtSingleParticle2:

Public Member Functions
	EvtSingleParticle2 ()
virtual	~EvtSingleParticle2 ()
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 EvtSingleParticle2.hh.

Constructor & Destructor Documentation

EvtSingleParticle2()

EvtSingleParticle2::EvtSingleParticle2 ( )

inline

Definition at line 33 of file EvtSingleParticle2.hh.

{}

Referenced by clone().

~EvtSingleParticle2()

EvtSingleParticle2::~EvtSingleParticle2 ( )

virtual

Definition at line 32 of file EvtSingleParticle2.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtSingleParticle2::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 40 of file EvtSingleParticle2.cc.

                                       {
 
  return new EvtSingleParticle2();
 
}

decay()

void EvtSingleParticle2::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 111 of file EvtSingleParticle2.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 theta;
  if(thetamax==thetamin) {theta=thetamax;} else
  theta=EvtRandom::Flat(thetamin,thetamax);
  double phi;
  if(phimin==phimax){phi=phimin;} else
  phi = EvtRandom::Flat(phimin,phimax);
  double pxy;
  if(pxymin==pxymax){pxy=pxymin;} else
    pxy =  EvtRandom::Flat(pxymin,pxymax);
 
  pmag=pxy/sin(theta);  
  cthetamax=cos(thetamax);
  cthetamin=cos(thetamin);
  double cthetalab;
 
  //  do{
    //generate flat distribution in costheta
 
    p4.set(sqrt(mass*mass+pmag*pmag),pmag*cos(phi)*sin(theta),
       pmag*sin(phi)*sin(theta),pmag*cos(theta));
    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 EvtSingleParticle2::getName ( std::string & name )

virtual

Implements EvtDecayBase.

Definition at line 34 of file EvtSingleParticle2.cc.

                                                     {
 
  model_name="SINGLE2";     
 
}

init()

void EvtSingleParticle2::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 46 of file EvtSingleParticle2.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!
 
      pxymin=getArg(0);
      pxymax=getArg(1);
      
      thetamin=getArg(2);
      thetamax=getArg(3);
      
      phimin=getArg(4);
      phimax=getArg(5);
 
    }
 
    if (getNArg()==4){
      //copy the arguments into eaiser to remember names!
      pxymin=getArg(0);
      pxymax=getArg(1);
      
      thetamin=getArg(2);
      thetamax=getArg(3);
 
      phimin=0.0;
      phimax=EvtConst::twoPi;
 
    }
 
    if (getNArg()==2){
      //copy the arguments into eaiser to remember names!
      pxymin=getArg(0);
      pxymax=getArg(1);
      
      thetamin=0.376383;
      thetamax=2.76521;   //|cos(theta)|<0.93
      
      phimin=0.0;
      phimax=EvtConst::twoPi;
 
    }
 
 
  }else{
    
    report(ERROR,"EvtGen") << "EvtSingleParticle generator expected "
                           << " 5, 3, or 1 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") << thetamax << " > theta > " << thetamin <<endl;
  report(INFO,"EvtGen") << phimax << " > phi > " << phimin <<endl;
 
}

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

• EvtSingleParticle2.hh
• EvtSingleParticle2.cc