EvtSVSCPLH Class Reference

#include <EvtSVSCPLH.hh>

Inheritance diagram for EvtSVSCPLH:

Public Member Functions
	EvtSVSCPLH ()
virtual	~EvtSVSCPLH ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	initProbMax ()
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 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 29 of file EvtSVSCPLH.hh.

Constructor & Destructor Documentation

EvtSVSCPLH()

EvtSVSCPLH::EvtSVSCPLH ( )

inline

Definition at line 32 of file EvtSVSCPLH.hh.

{}

Referenced by clone().

~EvtSVSCPLH()

EvtSVSCPLH::~EvtSVSCPLH ( )

virtual

Definition at line 37 of file EvtSVSCPLH.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtSVSCPLH::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 41 of file EvtSVSCPLH.cc.

{ return new EvtSVSCPLH; }

decay()

void EvtSVSCPLH::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 85 of file EvtSVSCPLH.cc.

                                       {
 
  p->initializePhaseSpace( getNDaug(), getDaugs() );
 
  static EvtId B0  = EvtPDL::getId( "B0" );
  static EvtId B0B = EvtPDL::getId( "anti-B0" );
 
  double t;
  EvtId  other_b;
 
  EvtCPUtil::OtherB( p, t, other_b, 0.5 );
 
  // convert time from mm to seconds
  t /= EvtConst::c;
 
  // sign convention is dm=Mheavy-Mlight
  //                    dGamma=Gammalight-Gammaheavy
  // such that in the standard model both of these are positive.
  EvtComplex gp = 0.5 * ( exp( EvtComplex( 0.25 * t * _dgamma, -0.5 * t * _dm ) ) +
                          exp( EvtComplex( -0.25 * t * _dgamma, 0.5 * t * _dm ) ) );
  EvtComplex gm = 0.5 * ( exp( EvtComplex( 0.25 * t * _dgamma, -0.5 * t * _dm ) ) -
                          exp( EvtComplex( -0.25 * t * _dgamma, 0.5 * t * _dm ) ) );
 
  EvtComplex amp;
 
  if ( other_b == B0B ) { amp = gp * _Af + _qop * gm * _Abarf; }
  else if ( other_b == B0 ) { amp = gp * _Abarf + _poq * gm * _Af; }
  else
  {
    report( ERROR, "EvtGen" ) << "other_b was not B0 or B0B!" << endl;
    ::abort();
  }
 
  EvtVector4R p4_parent = p->getP4Restframe();
  ;
 
  double norm =
      p->getDaug( 0 )->mass() / ( p->getDaug( 0 )->getP4().d3mag() * p4_parent.mass() );
 
  EvtParticle* v = p->getDaug( 0 );
 
  vertex( 0, amp * norm * ( p4_parent * ( v->epsParent( 0 ) ) ) );
  vertex( 1, amp * norm * ( p4_parent * ( v->epsParent( 1 ) ) ) );
  vertex( 2, amp * norm * ( p4_parent * ( v->epsParent( 2 ) ) ) );
 
  return;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 39 of file EvtSVSCPLH.cc.

{ model_name = "SVS_CPLH"; }

init()

void EvtSVSCPLH::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 43 of file EvtSVSCPLH.cc.

                      {
 
  // check that there are 8 arguments
  checkNArg( 8 );
  checkNDaug( 2 );
 
  checkSpinParent( EvtSpinType::SCALAR );
 
  checkSpinDaughter( 0, EvtSpinType::VECTOR );
  checkSpinDaughter( 1, EvtSpinType::SCALAR );
 
  static double ctau = EvtPDL::getctau( EvtPDL::getId( "B0" ) );
 
  // hbar/s
  _dm     = getArg( 0 );
  _dgamma = EvtConst::c * getArg( 1 ) / ctau;
 
  _qop = getArg( 2 ) * exp( EvtComplex( 0.0, getArg( 3 ) ) );
 
  _poq = 1.0 / _qop;
 
  _Af    = getArg( 4 ) * exp( EvtComplex( 0.0, getArg( 5 ) ) );
  _Abarf = getArg( 6 ) * exp( EvtComplex( 0.0, getArg( 7 ) ) );
 
  if ( verbose() )
  {
    report( INFO, "EvtGen" ) << ":EvtSVSCPLH:dm=" << _dm << endl;
    report( INFO, "EvtGen" ) << ":EvtSVSCPLH:dGamma=" << _dgamma << endl;
    report( INFO, "EvtGen" ) << ":EvtSVSCPLH:q/p=" << _qop << endl;
    report( INFO, "EvtGen" ) << ":EvtSVSCPLH:Af=" << _Af << endl;
    report( INFO, "EvtGen" ) << ":EvtSVSCPLH:Abarf=" << _Abarf << endl;
  }
}

initProbMax()

void EvtSVSCPLH::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 77 of file EvtSVSCPLH.cc.

                             {
 
  // This is probably not quite right, but it should do as a start...
  // Anders
 
  setProbMax( 4.0 * ( getArg( 4 ) * getArg( 4 ) + getArg( 6 ) * getArg( 6 ) ) );
}

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

• EvtSVSCPLH.hh
• EvtSVSCPLH.cc