EvtDIY Class Reference

#include <EvtDIY.hh>

Inheritance diagram for EvtDIY:

Public Member Functions
	EvtDIY ()
virtual	~EvtDIY ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	initProbMax ()
void	init ()
void	decay (EvtParticle *p)
double	AmplitudeSquare ()
EvtVector4R	GetDaugMomLab (int i)
EvtVector4R	GetDaugMomCM (int i)
EvtVector4R	GetDaugMomHel (int i)
int	GetNdaug ()
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 EvtDIY.hh.

Constructor & Destructor Documentation

EvtDIY()

EvtDIY::EvtDIY ( )

inline

Definition at line 33 of file EvtDIY.hh.

{}

Referenced by clone().

~EvtDIY()

EvtDIY::~EvtDIY ( )

virtual

Definition at line 44 of file Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc.

{}

Member Function Documentation

AmplitudeSquare()

double EvtDIY::AmplitudeSquare

(

)

Definition at line 176 of file UserDIY.cc.

                                {
  EvtVector4R dp1=GetDaugMomLab(0);
  EvtVector4R dp2=GetDaugMomLab(1),dp3=GetDaugMomLab(2);
 
// AngularSam ppbar(0.7,dp1);
// return ppbar.amps();
 
//   rhopi Jpsi2rhopi(dp1,dp2,dp3);
//   return Jpsi2rhopi.amps();
 
   rhopifull Jpsi2rhopi(dp1,dp2,dp3);
   return Jpsi2rhopi.amps();
 }

Referenced by decay().

clone()

EvtDecayBase * EvtDIY::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 52 of file Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc.

                           {
 
  return new EvtDIY;
 
}

decay()

void EvtDIY::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 79 of file Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc.

                                  {
 
double amps,SamAmps,rd1;
// calculated the max amplitude square in 20000 events, is it enough larger?
  if(nrun==1){
     int ir,nd;
     for(ir=0;ir<=200000;ir++){
  loop0:
       p->initializePhaseSpace(getNDaug(),getDaugs());
       int nd=p->getNDaug(),i;
       _nd=nd;
       for(i=0;i<=nd-1;i++){
          _p4Lab[i]=p->getDaug(i)->getP4Lab();
          _p4CM[i]=p->getDaug(i)->getP4();
       }
       amps=AmplitudeSquare();
       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"<<endl;abort();}
//cout<<"max_amp="<<max_amps<<endl;
 
 
loop:
  p->initializePhaseSpace(getNDaug(),getDaugs());
  int i;
  for(i=0;i<=p->getNDaug()-1;i++){
          _p4Lab[i]=p->getDaug(i)->getP4Lab(); 
          _p4CM[i]=p->getDaug(i)->getP4();
      }
//  Put phase space results into the daughters.
   amps=AmplitudeSquare();
   if(amps < 0) goto loop;
   SamAmps=amps/max_amps;
   rd1=EvtRandom::Flat(0.0, 1.0);
  if(rd1>=SamAmps) goto loop;
  return ;
}

GetDaugMomCM()

EvtVector4R EvtDIY::GetDaugMomCM ( int i )

inline

Definition at line 49 of file EvtDIY.hh.

{return _p4CM[i];}

GetDaugMomHel()

EvtVector4R EvtDIY::GetDaugMomHel ( int i )

inline

Definition at line 50 of file EvtDIY.hh.

{return _p4Hel[i];}

GetDaugMomLab()

EvtVector4R EvtDIY::GetDaugMomLab ( int i )

inline

Definition at line 48 of file EvtDIY.hh.

{return _p4Lab[i];}

Referenced by AmplitudeSquare().

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 46 of file Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc.

                                         {
 
  model_name="DIY";     
 
}

GetNdaug()

int EvtDIY::GetNdaug ( )

inline

Definition at line 53 of file EvtDIY.hh.

{return _nd;}   

init()

void EvtDIY::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 59 of file Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc.

                 {
 
// check that there are 1 arguments:angular distribution parameter 
//  checkNArg(0);
//  checkNDaug(2);
  EvtSpinType::spintype parenttype = EvtPDL::getSpinType(getParentId());
//  if ( parenttype == EvtSpinType::SCALAR ){
//  report(ERROR,"EvtGen")<<"Scalar decays with flat distribution"<<endl;
//  ::abort();
// }
}

initProbMax()

void EvtDIY::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 70 of file Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc.

                        {
  noProbMax();
 
}

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

• EvtDIY.hh
• Generator/BesEvtGen/BesEvtGen-00-04-30/src/EvtGen/EvtGenModels/EvtDIY.cc
• UserDIY.cc
• Reconstruction/QCMCFilterAlg/QCMCFilterAlg-00-01-02/src/EvtDIY.cc