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 33 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 46 of file EvtSVSCPLH.cc.

                               {
 
  return new EvtSVSCPLH;
 
}

decay()

void EvtSVSCPLH::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 96 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 52 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 87 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