EvtPhiDalitz Class Reference

#include <EvtPhiDalitz.hh>

Inheritance diagram for EvtPhiDalitz:

Public Member Functions
	EvtPhiDalitz ()
virtual	~EvtPhiDalitz ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	init ()
void	decay (EvtParticle *p)
Public Member Functions inherited from EvtDecayAmp
void	makeDecay (EvtParticle *p)
void	setWeight (double weight)
void	vertex (const EvtComplex &amp)
void	vertex (int i1, const EvtComplex &amp)
void	vertex (int i1, int i2, const EvtComplex &amp)
void	vertex (int i1, int i2, int i3, const EvtComplex &amp)
void	vertex (int *i1, const EvtComplex &amp)
virtual	~EvtDecayAmp ()
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 EvtDecayAmp
EvtAmp	_amp2
Protected Attributes inherited from EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 9 of file EvtPhiDalitz.hh.

Constructor & Destructor Documentation

EvtPhiDalitz()

EvtPhiDalitz::EvtPhiDalitz ( )

inline

Definition at line 13 of file EvtPhiDalitz.hh.

{}

Referenced by clone().

~EvtPhiDalitz()

EvtPhiDalitz::~EvtPhiDalitz ( )

virtual

Definition at line 13 of file EvtPhiDalitz.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtPhiDalitz::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 22 of file EvtPhiDalitz.cc.

                                 {
 
  return new EvtPhiDalitz;
 
}

decay()

void EvtPhiDalitz::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 43 of file EvtPhiDalitz.cc.

                                       {
 
  EvtId PIP=EvtPDL::getId("pi+");
  EvtId PIM=EvtPDL::getId("pi-");
  EvtId PIZ=EvtPDL::getId("pi0");
  EvtId RHOP=EvtPDL::getId("rho+");
  EvtId RHOM=EvtPDL::getId("rho-");
  EvtId RHOZ=EvtPDL::getId("rho0");
  EvtId OMEGA=EvtPDL::getId("omega");
 
  p->initializePhaseSpace(getNDaug(),getDaugs());
 
  EvtVector4R Ppip = p->getDaug(0)->getP4();
  EvtVector4R Ppim = p->getDaug(1)->getP4();
  EvtVector4R Ppi0 = p->getDaug(2)->getP4();
  EvtVector4R Qp = (Ppim + Ppi0);
  EvtVector4R Qm = (Ppip + Ppi0);
  EvtVector4R Q0 = (Ppip + Ppim);
  double m2_pip = pow(EvtPDL::getMeanMass(PIP),2); 
  double m2_pim = pow(EvtPDL::getMeanMass(PIM),2);
  double m2_pi0 = pow(EvtPDL::getMeanMass(PIZ),2);
  double M2rhop = pow(EvtPDL::getMeanMass(RHOP),2);
  double M2rhom = pow(EvtPDL::getMeanMass(RHOM),2);
  double M2rho0 = pow(EvtPDL::getMeanMass(RHOZ),2);
  double M2omega = pow(EvtPDL::getMeanMass(OMEGA),2);
 
  double Wrhop = EvtPDL::getWidth(RHOP);
  double Wrhom = EvtPDL::getWidth(RHOM);
  double Wrho0 = EvtPDL::getWidth(RHOZ);
  double Womega = EvtPDL::getWidth(OMEGA);
    
  EvtComplex Atot(0,0);
 
  //Rho+ Risonance Amplitude
  double Gp = Wrhop*pow(((Qp.mass2()-m2_pim-m2_pi0)/2-M2rhop/4)/(M2rhop/4-(m2_pim+m2_pi0)/2),3/2)*(M2rhop/Qp.mass2());
  EvtComplex Drhop((Qp.mass2()-M2rhop),Qp.mass()*Gp);
  EvtComplex A1(M2rhop/Drhop);
 
  //Rho- Risonance Amplitude
  double Gm = Wrhom*pow(((Qm.mass2()-m2_pip-m2_pi0)/2-M2rhom/4)/(M2rhom/4-(m2_pip+m2_pi0)/2),3/2)*(M2rhom/Qm.mass2());
  EvtComplex Drhom((Qm.mass2()-M2rhom),Qm.mass()*Gm);
  EvtComplex A2(M2rhom/Drhom);
 
  //Rho0 Risonance Amplitude
  double G0 = Wrho0*pow(((Q0.mass2()-m2_pip-m2_pim)/2-M2rho0/4)/(M2rho0/4-(m2_pip+m2_pim)/2),3/2)*(M2rho0/Q0.mass2());
  EvtComplex Drho0((Q0.mass2()-M2rho0),Q0.mass()*G0);
  EvtComplex A3(M2rho0/Drho0);
 
  //Omega Risonance Amplitude
  EvtComplex OmegaPhase(0,-0.22);    
  EvtComplex DOmega((Q0.mass2()-M2omega),Q0.mass()*Womega);
  EvtComplex A4(0.0071*M2omega*exp(OmegaPhase)/DOmega);
 
  //Direct Decay Amplitude
  EvtComplex DirPhase(0,2.47);
  EvtComplex A5(0.78*exp(DirPhase));
 
  Atot=A1+A2+A3+A4+A5;
 
  vertex(0,Atot);
  vertex(1,Atot);
  vertex(2,Atot);
 
  return ;
   
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 15 of file EvtPhiDalitz.cc.

                                               {
 
  model_name="PHI_DALITZ";     
 
}

init()

void EvtPhiDalitz::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 28 of file EvtPhiDalitz.cc.

                       {
 
  // check that there are 0 arguments
  checkNArg(0);
  checkNDaug(3);
 
  checkSpinParent(EvtSpinType::VECTOR);
 
  checkSpinDaughter(0,EvtSpinType::SCALAR);
  checkSpinDaughter(1,EvtSpinType::SCALAR);
  checkSpinDaughter(2,EvtSpinType::SCALAR);
}

---

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

• EvtPhiDalitz.hh
• EvtPhiDalitz.cc