EvtTauHadnu Class Reference

#include <EvtTauHadnu.hh>

Inheritance diagram for EvtTauHadnu:

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

Constructor & Destructor Documentation

EvtTauHadnu()

EvtTauHadnu::EvtTauHadnu ( )

inline

Definition at line 32 of file EvtTauHadnu.hh.

{}

Referenced by clone().

~EvtTauHadnu()

EvtTauHadnu::~EvtTauHadnu ( )

virtual

Definition at line 36 of file EvtTauHadnu.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtTauHadnu::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 45 of file EvtTauHadnu.cc.

                                {
 
  return new EvtTauHadnu;
 
}

decay()

void EvtTauHadnu::decay ( EvtParticle *  p )

virtual

Implements EvtDecayBase.

Definition at line 114 of file EvtTauHadnu.cc.

                                     {
 
  static EvtId TAUM=EvtPDL::getId("tau-");
 
  EvtIdSet thePis("pi+","pi-","pi0");
  EvtIdSet theKs("K+","K-");
 
  p->initializePhaseSpace(getNDaug(),getDaugs());
  
  EvtParticle *nut;
  nut = p->getDaug(getNDaug()-1);
 
  //get the leptonic current 
  EvtVector4C tau1, tau2;
  
  if (p->getId()==TAUM) {
    tau1=EvtLeptonVACurrent(nut->spParentNeutrino(),p->sp(0));
    tau2=EvtLeptonVACurrent(nut->spParentNeutrino(),p->sp(1));
  }
  else{
    tau1=EvtLeptonVACurrent(p->sp(0),nut->spParentNeutrino());
    tau2=EvtLeptonVACurrent(p->sp(1),nut->spParentNeutrino());
  }
 
  EvtVector4C hadCurr;
  bool foundHadCurr=false;
  if ( getNDaug() == 2 ) {
    hadCurr = p->getDaug(0)->getP4();
    foundHadCurr=true;
  }
  if ( getNDaug() == 3 ) {
 
    //pi pi nu with rho and rhopr resonance
    if ( thePis.contains(getDaug(0)) &&
     thePis.contains(getDaug(1)) ) {
 
      EvtVector4R q1 = p->getDaug(0)->getP4();
      EvtVector4R q2 = p->getDaug(1)->getP4();
  
      hadCurr = Fpi(q1,q2)*(q1-q2);
 
      foundHadCurr = true;
    }
 
  }
  if ( getNDaug() == 4 ) {
    if ( thePis.contains(getDaug(0)) &&
     thePis.contains(getDaug(1)) &&
     thePis.contains(getDaug(2)) ) {
      foundHadCurr = true;
      //figure out which is the different charged pi
      //want it to be q3
 
      int diffPi(0),samePi1(0),samePi2(0);
      if ( getDaug(0) == getDaug(1) ) {diffPi=2; samePi1=0; samePi2=1;}
      if ( getDaug(0) == getDaug(2) ) {diffPi=1; samePi1=0; samePi2=2;}
      if ( getDaug(1) == getDaug(2) ) {diffPi=0; samePi1=1; samePi2=2;}
 
      EvtVector4R q1=p->getDaug(samePi1)->getP4();
      EvtVector4R q2=p->getDaug(samePi2)->getP4();
      EvtVector4R q3=p->getDaug(diffPi)->getP4();
      
      EvtVector4R Q=q1+q2+q3;
      double qMass2=Q.mass2();
 
      double GA1=_gammaA1*pi3G(Q.mass2(),samePi1)/pi3G(_mA1*_mA1,samePi1);
 
      EvtComplex denBA1(_mA1*_mA1 - Q.mass2(),-1.*_mA1*GA1);
      EvtComplex BA1 = _mA1*_mA1 / denBA1;
 
      hadCurr = BA1*( (q1-q3) - (Q*(Q*(q1-q3))/qMass2)*Fpi(q2,q3) +
              (q2-q3) - (Q*(Q*(q2-q3))/qMass2)*Fpi(q1,q3) ); 
 
 
    }
 
 
  }
 
 
 
  if ( !foundHadCurr ) {
    report(ERROR,"EvtGen") << "Have not yet implemented this final state in TAUHADNU model" << endl;
    report(ERROR,"EvtGen") << "Ndaug="<<getNDaug() << endl;
    int id;
    for ( id=0; id<(getNDaug()-1); id++ ) 
      report(ERROR,"EvtGen") << "Daug " << id << " "<<EvtPDL::name(getDaug(id)).c_str() << endl;
 
  }
 
  
  vertex(0,tau1*hadCurr);
  vertex(1,tau2*hadCurr);
 
  return;
 
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 38 of file EvtTauHadnu.cc.

                                              {
 
  model_name="TAUHADNU";     
 
}

init()

void EvtTauHadnu::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 51 of file EvtTauHadnu.cc.

                       {
 
  // check that there are 0 arguments
 
  checkSpinParent(EvtSpinType::DIRAC);
 
  //the last daughter should be a neutrino
  checkSpinDaughter(getNDaug()-1,EvtSpinType::NEUTRINO);
 
  int i;
  for ( i=0; i<(getNDaug()-1);i++) {
    checkSpinDaughter(i,EvtSpinType::SCALAR);
  }
 
  bool validndaug=false;
 
  if ( getNDaug()==4 ) {
    //pipinu
    validndaug=true;
    checkNArg(7);
    _beta = getArg(0);
    _mRho = getArg(1);
    _gammaRho = getArg(2);
    _mRhopr = getArg(3);
    _gammaRhopr = getArg(4);
    _mA1 = getArg(5);
    _gammaA1 = getArg(6);
  }
  if ( getNDaug()==3 ) {
    //pipinu
    validndaug=true;
    checkNArg(5);
    _beta = getArg(0);
    _mRho = getArg(1);
    _gammaRho = getArg(2);
    _mRhopr = getArg(3);
    _gammaRhopr = getArg(4);
  }
  if ( getNDaug()==2 ) {
    //pipinu
    validndaug=true;
    checkNArg(0);
  }
 
  if ( !validndaug ) {
    report(ERROR,"EvtGen") << "Have not yet implemented this final state in TAUHADNU model" << endl;
    report(ERROR,"EvtGen") << "Ndaug="<<getNDaug() << endl;
    int id;
    for ( id=0; id<(getNDaug()-1); id++ ) 
      report(ERROR,"EvtGen") << "Daug " << id << " "<<EvtPDL::name(getDaug(id)).c_str() << endl;
 
  }
 
}

initProbMax()

void EvtTauHadnu::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 106 of file EvtTauHadnu.cc.

                             {
 
  if ( getNDaug()==2 )  setProbMax(90.0);
  if ( getNDaug()==3 )  setProbMax(2500.0);
  if ( getNDaug()==4 )  setProbMax(5000.0);
 
}

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

• EvtTauHadnu.hh
• EvtTauHadnu.cc