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 12 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 17 of file EvtPhiDalitz.cc.

{ return new EvtPhiDalitz; }

decay()

void EvtPhiDalitz::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 32 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 19 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 );
}

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

• EvtPhiDalitz.hh
• EvtPhiDalitz.cc