EvtP2GC1 Class Reference

#include <EvtP2GC1.hh>

Inheritance diagram for EvtP2GC1:

Public Member Functions
	EvtP2GC1 ()
virtual	~EvtP2GC1 ()
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 EvtP2GC1.hh.

Constructor & Destructor Documentation

EvtP2GC1()

EvtP2GC1::EvtP2GC1 ( )

inline

Definition at line 31 of file EvtP2GC1.hh.

{}

Referenced by clone().

~EvtP2GC1()

EvtP2GC1::~EvtP2GC1 ( )

virtual

Definition at line 36 of file EvtP2GC1.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtP2GC1::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 40 of file EvtP2GC1.cc.

{ return new EvtP2GC1; }

decay()

void EvtP2GC1::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 63 of file EvtP2GC1.cc.

                                     {
 
  p->initializePhaseSpace( getNDaug(), getDaugs() );
 
  EvtParticle *v, *s1;
  EvtVector4R  pv, ps, ppr;
 
  v   = p->getDaug( 0 ); // gamma
  s1  = p->getDaug( 1 ); // chi_c1
  pv  = v->getP4();
  ps  = s1->getP4();
  ppr = p->getP4();
 
  //  Put phase space results into the daughters.
  EvtHelSys angles( ppr, pv ); // using helicity sys. angles
  double    theta = angles.getHelAng( 1 );
  double    phi   = angles.getHelAng( 2 );
  double    gamma = 0;
  double    alpha = -1. / 3.;
  double    A02   = sqrt( ( 1 + alpha ) / 2 );
  double    A00   = sqrt( ( 1 - alpha ) / 4 );
  double    A12 = -A02, A11 = -A00;
  int       j1, j2, j3;
  for ( j1 = 0; j1 <= 2; )
  {
    for ( j2 = 0; j2 <= 1; )
    {
      for ( j3 = 0; j3 <= 2; )
      {
        vertex( j1, j2, j3, 0.0 );
        j3++;
      }
      j2++;
    }
    j1++;
  }
 
  vertex( 0, 1, 2, Djmn( 1, 1, -1, phi, theta, gamma ) * A12 ); // helicity for psiprime = 1
  vertex( 0, 1, 1, Djmn( 1, 1, 0, phi, theta, gamma ) * A11 );
  vertex( 0, 0, 2, Djmn( 1, 1, 1, phi, theta, gamma ) * A02 );
  vertex( 0, 0, 0, Djmn( 1, 1, 0, phi, theta, gamma ) * A00 );
 
  vertex( 1, 1, 2, Djmn( 1, -1, -1, phi, theta, gamma ) * A12 ); // helicity for psiprime = -1
  vertex( 1, 1, 1, Djmn( 1, -1, 0, phi, theta, gamma ) * A11 );
  vertex( 1, 0, 2, Djmn( 1, -1, 1, phi, theta, gamma ) * A02 );
  vertex( 1, 0, 0, Djmn( 1, -1, 0, phi, theta, gamma ) * A00 );
 
  vertex( 2, 1, 2, Djmn( 1, 0, -1, phi, theta, gamma ) * A12 ); // helicity for psiprime = -1
  vertex( 2, 1, 1, Djmn( 1, 0, 0, phi, theta, gamma ) * A11 );
  vertex( 2, 0, 2, Djmn( 1, 0, 1, phi, theta, gamma ) * A02 );
  vertex( 2, 0, 0, Djmn( 1, 0, 0, phi, theta, gamma ) * A00 );
 
  return;
}

getName()

void EvtP2GC1::getName ( std::string & name )

virtual

Implements EvtDecayBase.

Definition at line 38 of file EvtP2GC1.cc.

{ model_name = "P2GC1"; }

init()

void EvtP2GC1::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 42 of file EvtP2GC1.cc.

                    {
  static EvtId GAM = EvtPDL::getId( "gamma" );
  // check that there are 0 arguments
  checkNArg( 0 );
  checkNDaug( 2 );
  checkSpinParent( EvtSpinType::VECTOR );
  checkSpinDaughter( 0, EvtSpinType::PHOTON );
  checkSpinDaughter( 1, EvtSpinType::VECTOR );
  if ( !( getDaug( 0 ) == GAM ) )
  {
    report( ERROR, "EvtGen" ) << "EvtP2GC1 generator radiative decays expected " << endl;
    ::abort();
  }
}

initProbMax()

void EvtP2GC1::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 57 of file EvtP2GC1.cc.

                           {
 
  // Hard coded... should not be hard to calculate...
  setProbMax( 1.67 );
}

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

• EvtP2GC1.hh
• EvtP2GC1.cc