EvtKstarstargamma Class Reference

#include <EvtKstarstargamma.hh>

Inheritance diagram for EvtKstarstargamma:

Public Member Functions
	EvtKstarstargamma ()
virtual	~EvtKstarstargamma ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	decay (EvtParticle *p)
void	init ()
void	initProbMax ()
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 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 28 of file EvtKstarstargamma.hh.

Constructor & Destructor Documentation

EvtKstarstargamma()

EvtKstarstargamma::EvtKstarstargamma ( )

inline

Definition at line 31 of file EvtKstarstargamma.hh.

{}

Referenced by clone().

~EvtKstarstargamma()

EvtKstarstargamma::~EvtKstarstargamma ( )

virtual

Definition at line 39 of file EvtKstarstargamma.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtKstarstargamma::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 43 of file EvtKstarstargamma.cc.

{ return new EvtKstarstargamma; }

decay()

void EvtKstarstargamma::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 65 of file EvtKstarstargamma.cc.

                                              {
 
  p->initializePhaseSpace( getNDaug(), getDaugs() );
 
  EvtParticle* kaon   = p->getDaug( 0 );
  EvtParticle* pion   = p->getDaug( 1 );
  EvtParticle* photon = p->getDaug( 2 );
 
  EvtComplexPtrPtr Hd1 = new EvtComplexPtr[5];
  Hd1[0]               = new EvtComplex[2];
  Hd1[1]               = new EvtComplex[2];
  Hd1[2]               = new EvtComplex[2];
  Hd1[3]               = new EvtComplex[2];
  Hd1[4]               = new EvtComplex[2];
 
  Hd1[0][0] = 0.0;
  Hd1[0][1] = 0.0;
  Hd1[1][0] = 0.0;
  Hd1[1][1] = 0.0;
  Hd1[2][0] = 0.0;
  Hd1[2][1] = 0.0;
  Hd1[3][0] = 0.0;
  Hd1[3][1] = 1.0;
  Hd1[4][0] = 0.0;
  Hd1[4][1] = 0.0;
 
  EvtEvalHelAmp d1( EvtSpinType::SCALAR, EvtSpinType::TENSOR, EvtSpinType::PHOTON, Hd1 );
 
  EvtScalarParticle theB;
 
  theB.init( p->getId(), p->getP4Restframe() );
 
  EvtVector4R theKstarP4 = kaon->getP4() + pion->getP4();
 
  EvtTensorParticle theKstar;
  theKstar.init( EvtPDL::getId( std::string( "K_2*0" ) ), theKstarP4 );
 
  EvtPhotonParticle thePhoton;
  thePhoton.init( EvtPDL::getId( std::string( "K_2*0" ) ), photon->getP4() );
 
  theKstar.addDaug( &theB );
  thePhoton.addDaug( &theB );
 
  EvtAmp amp1;
 
  d1.evalAmp( &theB, amp1 );
 
  EvtComplexPtrPtr Hd2 = new EvtComplexPtr[1];
  Hd2[0]               = new EvtComplex[1];
 
  Hd2[0][0] = 1.0;
 
  EvtEvalHelAmp d2( EvtSpinType::TENSOR, EvtSpinType::SCALAR, EvtSpinType::SCALAR, Hd2 );
 
  EvtVector4R theKstarP4boost( theKstarP4.get( 0 ), -theKstarP4.get( 1 ), -theKstarP4.get( 2 ),
                               -theKstarP4.get( 3 ) );
 
  EvtScalarParticle theKaon;
  theKaon.init( EvtPDL::getId( std::string( "K+" ) ),
                boostTo( kaon->getP4(), theKstarP4boost ) );
 
  EvtScalarParticle thePion;
  thePion.init( EvtPDL::getId( std::string( "pi+" ) ),
                boostTo( pion->getP4(), theKstarP4boost ) );
 
  theKaon.addDaug( &theKstar );
  thePion.addDaug( &theKstar );
 
  // Calculate the propagator
 
  double                m = theKstarP4.mass();
  EvtTwoBodyVertex      v( 0.5, 0.14, 1.4, 2 );
  EvtTwoBodyKine        v1( 0.5, 0.14, m );
  EvtPropBreitWignerRel prop( 1.4, 0.2 );
 
  // Mass-dependent width correction and amplitude calculation
 
  double width = prop.g0() * v.widthFactor( v1 );
  prop.set_g0( width );
  EvtComplex bwamp = prop.evaluate( m );
 
  EvtAmp amp2;
 
  d2.evalAmp( &theKstar, amp2 );
 
  vertex( 0, bwamp * ( amp1._amp[0] * amp2._amp[0] + amp1._amp[1] * amp2._amp[1] +
                       amp1._amp[2] * amp2._amp[2] + amp1._amp[3] * amp2._amp[3] +
                       amp1._amp[4] * amp2._amp[4] ) );
 
  vertex( 1, bwamp * ( amp1._amp[5] * amp2._amp[0] + amp1._amp[6] * amp2._amp[1] +
                       amp1._amp[7] * amp2._amp[2] + amp1._amp[8] * amp2._amp[3] +
                       amp1._amp[9] * amp2._amp[4] ) );
 
  return;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 41 of file EvtKstarstargamma.cc.

{ model_name = "KSTARSTARGAMMA"; }

init()

void EvtKstarstargamma::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 45 of file EvtKstarstargamma.cc.

                             {
 
  // check that there are 0 arguments
  checkNArg( 0 );
 
  // check that there are 3 daughters
  checkNDaug( 3 );
 
  // check the parent and daughter spins
  checkSpinParent( EvtSpinType::SCALAR );
  checkSpinDaughter( 0, EvtSpinType::SCALAR );
  checkSpinDaughter( 1, EvtSpinType::SCALAR );
  checkSpinDaughter( 2, EvtSpinType::PHOTON );
}

initProbMax()

void EvtKstarstargamma::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 60 of file EvtKstarstargamma.cc.

                                    {
 
  // setProbMax(1.0);
}

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

• EvtKstarstargamma.hh
• EvtKstarstargamma.cc