EvtBtoXsEtap Class Reference

#include <EvtBtoXsEtap.hh>

Inheritance diagram for EvtBtoXsEtap:

Public Member Functions
	EvtBtoXsEtap ()
virtual	~EvtBtoXsEtap ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	initProbMax ()
void	init ()
void	decay (EvtParticle *p)
Public Member Functions inherited from EvtDecayIncoherent
void	makeDecay (EvtParticle *p)
virtual	~EvtDecayIncoherent ()
void	setDaughterSpinDensity (int daughter)
int	isDaughterSpinDensitySet (int daughter)
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 EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 29 of file EvtBtoXsEtap.hh.

Constructor & Destructor Documentation

EvtBtoXsEtap()

EvtBtoXsEtap::EvtBtoXsEtap ( )

inline

Definition at line 32 of file EvtBtoXsEtap.hh.

{}

Referenced by clone().

~EvtBtoXsEtap()

EvtBtoXsEtap::~EvtBtoXsEtap ( )

virtual

Definition at line 36 of file EvtBtoXsEtap.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtBtoXsEtap::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 40 of file EvtBtoXsEtap.cc.

{ return new EvtBtoXsEtap; }

decay()

void EvtBtoXsEtap::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 51 of file EvtBtoXsEtap.cc.

                                         {
 
  // useless
  //  if ( p->getNDaug() != 0 ) {
  //  //Will end up here because maxrate multiplies by 1.2
  //  report(DEBUG,"EvtGen") << "In EvtBtoXsEtap: X_s daughters should not be here!"<<endl;
  //  return;
  //}
 
  double m_b;
  int    i;
  p->makeDaughters( getNDaug(), getDaugs() );
  EvtParticle* pdaug[MAX_DAUG];
 
  for ( i = 0; i < getNDaug(); i++ ) { pdaug[i] = p->getDaug( i ); }
 
  static EvtVector4R p4[MAX_DAUG];
  static double      mass[MAX_DAUG];
 
  m_b = p->mass();
 
  // Prepare for phase space routine.
 
  mass[1] = EvtPDL::getMass( getDaug( 1 ) );
 
  double xbox, ybox, min, max, hichfit;
  min                 = 0.493;
  max                 = 4.3;
  const double TwoPi  = EvtConst::twoPi;
  int          Xscode = EvtPDL::getStdHep( getDaug( 0 ) );
 
  // A five parameters fit, the shape is taken from Atwood & Soni
 
  //  double par[18];
  double par[6];
  if ( ( Xscode == 30343 ) || ( Xscode == -30343 ) || ( Xscode == 30353 ) ||
       ( Xscode == -30353 ) )
  {               // Xsu or Xsd
    min = 0.6373; //  Just above K pi threshold for Xsd/u
    // min=0.6333; //  K pi threshold for neutral Xsd
    //     par[0]=-2057.2380371094;
    par[0] = 2.36816;
    //    par[1]=2502.2556152344;
    par[1] = 0.62325725;
    //    par[2]=1151.5632324219;
    par[2] = 2.2;
    //    par[3]=0.82431584596634;
    par[3] = -0.2109375;
    //    par[4]=-4110.5234375000;
    par[4] = 2.7;
    //    par[5]=8445.6757812500;
    par[5] = 0.54;
    //    par[6]=-3034.1894531250;
    //    par[7]=1.1557708978653;
    //    par[8]=1765.9311523438;
    //    par[9]=1.3730158805847;
    //    par[10]=0.51371538639069;
    //    par[11]=2.0056934356689;
    //    par[12]=37144.097656250;
    //    par[13]=-50296.781250000;
    //    par[14]=27319.095703125;
    //    par[15]=-7408.0678710938;
    //    par[16]=1000.8093261719;
    //    par[17]=-53.834449768066;
  }
  else
  {
    report( DEBUG, "EvtGen" ) << "In EvtBtoXsEtap: Particle with id " << Xscode
                              << " is not a Xsd/u particle" << endl;
    return;
  }
 
  double boxheight = par[5];
  double boxwidth  = max - min;
 
  mass[0] = 0.0;
  while ( ( mass[0] > max ) || ( mass[0] < min ) )
  {
    xbox = EvtRandom::Flat( boxwidth ) + min;
    ybox = EvtRandom::Flat( boxheight );
    if ( xbox < par[2] )
    {
 
      hichfit =
          ( 1 / sqrt( TwoPi * par[1] ) ) * exp( -0.5 * pow( ( xbox - par[0] ) / par[1], 2 ) );
      //      alifit=par[0]+par[1]*xbox+par[2]*pow(xbox,2);
      //    } else if (xbox<par[7]) {
      //      alifit=par[4]+par[5]*xbox+par[6]*pow(xbox,2);
      //    } else if (xbox<par[11]) {
      //      alifit=par[8]*exp(-0.5*pow((xbox-par[9])/par[10],2));
    }
    else
    {
      hichfit = par[3] * pow( ( xbox - par[4] ), 2 ) + par[5];
      //      alifit=par[12]+par[13]*xbox+par[14]*pow(xbox,2)+par[15]*pow(xbox,3)+par[16]*pow(xbox,4)+par[17]*pow(xbox,5);
    }
    if ( ybox > hichfit ) { mass[0] = 0.0; }
    else { mass[0] = xbox; }
  }
 
  // debug stuff:  report(INFO,"EvtGen") << "Xscode " << Xscode << " daughter 1 mass " <<
  // mass[0] << " daughter 2 mass " << mass[1] << endl;
 
  EvtGenKine::PhaseSpace( getNDaug(), mass, p4, m_b );
 
  for ( i = 0; i < getNDaug(); i++ ) { pdaug[i]->init( getDaugs()[i], p4[i] ); }
 
  return;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 38 of file EvtBtoXsEtap.cc.

{ model_name = "BTOXSETAP"; }

init()

void EvtBtoXsEtap::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 42 of file EvtBtoXsEtap.cc.

                        {
 
  // check that there are no arguments
 
  checkNArg( 0 );
}

initProbMax()

void EvtBtoXsEtap::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 49 of file EvtBtoXsEtap.cc.

{ noProbMax(); }

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

• EvtBtoXsEtap.hh
• EvtBtoXsEtap.cc