EvtFDC Class Reference

#include <EvtFDC.hh>

Inheritance diagram for EvtFDC:

Public Member Functions
	EvtFDC ()
virtual	~EvtFDC ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	initProbMax ()
void	init ()
void	decay (EvtParticle *p)
double	AmplitudeSquare ()
int	GetNdaug ()
void	setEvtMomentum (EvtVector4R *p4)
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 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 EvtFDC.hh.

Constructor & Destructor Documentation

EvtFDC()

EvtFDC::EvtFDC ( )

inline

Definition at line 33 of file EvtFDC.hh.

{}

Referenced by clone().

~EvtFDC()

EvtFDC::~EvtFDC ( )

virtual

Definition at line 61 of file EvtFDC.cc.

{}

Member Function Documentation

AmplitudeSquare()

double EvtFDC::AmplitudeSquare

(

)

clone()

EvtDecayBase * EvtFDC::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 69 of file EvtFDC.cc.

                           {
 
  return new EvtFDC;
 
}

decay()

void EvtFDC::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 105 of file EvtFDC.cc.

                                  {
double amps,SamAmps,rd1;
// calculated the max amplitude square in 20000 events, is it enough larger?
  if(nrun==1){
     int ir,nd;
     std::cout<<"Wait for a moment for calculation of maxiumal amplitude squared"<<std::endl;
     for(ir=0;ir<=200000;ir++){
  loop0:
       p->initializePhaseSpace(getNDaug(),getDaugs());
       int nd=p->getNDaug();
       _nd=nd;
       for(int i=0;i<=nd-1;i++){
          _p4[i]=p->getDaug(i)->getP4Lab();
       }
       for (int i=0; i<_nd; i++){
          e[i]  = _p4[i].get(0);
          px[i] = _p4[i].get(1);
          py[i] = _p4[i].get(2);
          pz[i] = _p4[i].get(3);   
        }
       //for debuging
       amps = fdcevtgen_(e,px,py,pz); 
       //std::cout<<"nrun "<<nrun<<std::endl;
       if(amps<0) goto loop0;
       if(amps>max_amps) max_amps=amps*1.01;
       nrun++;
     }
  }
if(max_amps==0.0) {report(ERROR,"EvtGen")<<"The decay amplitude square should be positive number, but it is "<<max_amps<<endl;abort();}
//cout<<"max_amp="<<max_amps<<endl;
 
 
loop:
  p->initializePhaseSpace(getNDaug(),getDaugs());
  int i;
  for(i=0;i<=p->getNDaug()-1;i++){
       _p4[i]=p->getDaug(i)->getP4Lab();
      }
   setEvtMomentum(_p4);
//  Put phase space results into the daughters.
   amps = fdcevtgen_(e,px,py,pz);
   if(amps < 0) goto loop;
   SamAmps=amps/max_amps;
   rd1=EvtRandom::Flat(0.0, 1.0);
  if(rd1>=SamAmps) goto loop;
  if(amps>max_amps) max_amps=amps*1.01;
   nrun++; 
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 63 of file EvtFDC.cc.

                                         {
 
  model_name="FDC";     
 
}

GetNdaug()

int EvtFDC::GetNdaug ( )

inline

Definition at line 49 of file EvtFDC.hh.

{return _nd;}   

init()

void EvtFDC::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 76 of file EvtFDC.cc.

                 {
   init_fit_();
   initevtgen_();
   int ndiag = -1; //Feyman diagram number, started from 1, if -1, generate all intermediate states including interference effects
  if (getNArg()==1) {
    ndiag = getArg(0);
  }
   setamp_( &ndiag );
 
  EvtSpinType::spintype parenttype = EvtPDL::getSpinType(getParentId());
}

initProbMax()

void EvtFDC::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 87 of file EvtFDC.cc.

                        {
  noProbMax();
 
}

setEvtMomentum()

void EvtFDC::setEvtMomentum

(

EvtVector4R *

p4

)

Definition at line 96 of file EvtFDC.cc.

                                          {
  for (int i=0; i<_nd; i++){
     e[i]  = _p4[i].get(0); 
     px[i] = _p4[i].get(1);
     py[i] = _p4[i].get(2);
     pz[i] = _p4[i].get(3);
  }
}

Referenced by decay().

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

• EvtFDC.hh
• EvtFDC.cc