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 32 of file EvtDIY.hh.

{}

Referenced by clone().

~EvtDIY()

EvtDIY::~EvtDIY ( )

virtual

Definition at line 44 of file BOSS_Gen/BesEvtGen/src/EvtGen/EvtGenModels/EvtDIY.cc.

{}

Member Function Documentation

AmplitudeSquare()

double EvtDIY::AmplitudeSquare

(

)

Definition at line 182 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 48 of file BOSS_Gen/BesEvtGen/src/EvtGen/EvtGenModels/EvtDIY.cc.

{ return new EvtDIY; }

decay()

void EvtDIY::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 66 of file BOSS_Gen/BesEvtGen/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 48 of file EvtDIY.hh.

{ return _p4CM[i]; }

GetDaugMomHel()

EvtVector4R EvtDIY::GetDaugMomHel ( int i )

inline

Definition at line 49 of file EvtDIY.hh.

{ return _p4Hel[i]; }

GetDaugMomLab()

EvtVector4R EvtDIY::GetDaugMomLab ( int i )

inline

Definition at line 47 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 BOSS_Gen/BesEvtGen/src/EvtGen/EvtGenModels/EvtDIY.cc.

{ model_name = "DIY"; }

GetNdaug()

int EvtDIY::GetNdaug ( )

inline

Definition at line 51 of file EvtDIY.hh.

{ return _nd; }

init()

void EvtDIY::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 50 of file BOSS_Gen/BesEvtGen/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 61 of file BOSS_Gen/BesEvtGen/src/EvtGen/EvtGenModels/EvtDIY.cc.

{ noProbMax(); }

---

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

• EvtDIY.hh
• BOSS_Gen/BesEvtGen/src/EvtGen/EvtGenModels/EvtDIY.cc
• UserDIY.cc
• BOSS_Source/Reconstruction/QCMCFilterAlg/src/EvtDIY.cc