EvtSSSCPpng Class Reference

#include <EvtSSSCPpng.hh>

Inheritance diagram for EvtSSSCPpng:

Public Member Functions
	EvtSSSCPpng ()
virtual	~EvtSSSCPpng ()
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 void	getName (std::string &name)=0
virtual void	decay (EvtParticle *p)=0
virtual void	makeDecay (EvtParticle *p)=0
virtual EvtDecayBase *	clone ()=0
virtual void	init ()
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 28 of file EvtSSSCPpng.hh.

Constructor & Destructor Documentation

EvtSSSCPpng()

EvtSSSCPpng::EvtSSSCPpng ( )

inline

Definition at line 32 of file EvtSSSCPpng.hh.

{}

Referenced by clone().

~EvtSSSCPpng()

EvtSSSCPpng::~EvtSSSCPpng ( )

virtual

Definition at line 35 of file EvtSSSCPpng.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtSSSCPpng::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 44 of file EvtSSSCPpng.cc.

                                {
 
  return new EvtSSSCPpng;
 
}

decay()

void EvtSSSCPpng::decay ( EvtParticle *  p )

virtual

Implements EvtDecayBase.

Definition at line 69 of file EvtSSSCPpng.cc.

                                       {
 
  //added by Lange Jan4,2000
  static EvtId B0=EvtPDL::getId("B0");
  static EvtId B0B=EvtPDL::getId("anti-B0");
 
  double t;
  EvtId other_b;
 
  p->initializePhaseSpace(getNDaug(),getDaugs());
 
  EvtComplex amp;
 
  EvtComplex A,Abar;
  //EvtComplex ACC, AbarCC;
 
// assume single (top) quark dominance for the penguin.
 
// old: a0=alpha, a1=dm, a2=1, a3=1, a4=0, a5=1, a6=0
// new: a0=beta, a1=gamma, a2=delta, a3=dm, a4=1, a5=1=A_{T}, a6=A_{P}/A_{T}
 
// e.g., for B -> pi pi  
// A_{T} = |V_{ub} V_{ud}| T
// A_{P} = |V_{tb} V_{td}| P
// P and T are purely hadronic matrix elements       
// P/T = 0.055, A_{P}/A_{T} = 0.2 (see Marrocchesi and Paver, hep-ph/9702353)
 
// A = A_{T}( exp(i(beta+gamma)) + (A_{P}/A_{T}) exp(i(delta))
// A_bar = same, except for the sign of the weak phases 
// here, delta = delta_{p}-delta_{t} (rel. strong phase)
 
   A=getArg(5)*(EvtComplex(cos(-getArg(0)-getArg(1)),sin(-getArg(0)-getArg(1)))+getArg(6)*EvtComplex(cos(getArg(2)),sin(getArg(2))));
 
   Abar=getArg(5)*(EvtComplex(cos(getArg(0)+getArg(1)),sin(getArg(0)+getArg(1)))+getArg(6)*EvtComplex(cos(getArg(2)),sin(getArg(2))));
 
// get fraction of B0 tags with these amplitudes
 
  //double xd = 0.65;
  double ratio = 1/(1 + 0.65*0.65);
  
  EvtComplex rf, rbarf;
 
  rf = EvtComplex(cos(2.0*getArg(0)),sin(2.0*getArg(0)))*Abar/A;
  rbarf = EvtComplex(1.0)/rf;
 
  double A2 = real(A)*real(A) + imag(A)*imag(A);
  double Abar2 = real(Abar)*real(Abar) + imag(Abar)*imag(Abar);
  
  double rf2 = real(rf)*real(rf) + imag(rf)*imag(rf);    
  double rbarf2 = real(rbarf)*real(rbarf) + imag(rbarf)*imag(rbarf);    
 
  //fraction of B0 _tags_
  double fract =(Abar2*(1+ rbarf2 + (1 - rbarf2)*ratio))/(Abar2*(1+ rbarf2 + (1 - rbarf2)*ratio) + A2*(1+ rf2 + (1 - rf2)*ratio)); 
  
  EvtCPUtil::OtherB(p,t,other_b,fract);
 
//this method works just as well -- NK
//randomly generate the tag (B0 or B0B) 
 
//  double tag = EvtRandom::Flat(0.0,1.0);
//  if (tag < 0.5) {
//
//   EvtCPUtil::OtherB(p,t,other_b,1.0);
//   other_b = B0;
//  }
//  else {
//   
//   EvtCPUtil::OtherB(p,t,other_b,0.0);
//   other_b = B0B;
//  }
 
//mixing angle = -beta
 
   if (other_b==B0B){
     amp=A*cos(getArg(3)*t/(2*EvtConst::c))+
       EvtComplex(cos(2.0*getArg(0)),sin(2.0*getArg(0)))*
       getArg(4)*EvtComplex(0.0,1.0)*Abar*sin(getArg(3)*t/(2*EvtConst::c));
   }
   if (other_b==B0){
     amp=A*EvtComplex(cos(-2.0*getArg(0)),sin(-2.0*getArg(0)))*
       EvtComplex(0.0,1.0)*sin(getArg(3)*t/(2*EvtConst::c))+       
       getArg(4)*Abar*cos(getArg(3)*t/(2*EvtConst::c));
   }
 
   vertex(amp);
 
  return ;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 37 of file EvtSSSCPpng.cc.

                                              {
 
  model_name="SSS_CP_PNG";     
 
}

init()

void EvtSSSCPpng::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 50 of file EvtSSSCPpng.cc.

                      {
 
  // check that there are 7 arguments
  checkNArg(7);
  checkNDaug(2);
 
  checkSpinParent(EvtSpinType::SCALAR);
 
  checkSpinDaughter(0,EvtSpinType::SCALAR);
  checkSpinDaughter(1,EvtSpinType::SCALAR);
 
}

initProbMax()

void EvtSSSCPpng::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 63 of file EvtSSSCPpng.cc.

                             {
 
   setProbMax(getArg(5)*getArg(5)*(1 + getArg(6)*getArg(6)));
 
}

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

• EvtSSSCPpng.hh
• EvtSSSCPpng.cc