EvtBto2piCPiso Class Reference

#include <EvtBto2piCPiso.hh>

Inheritance diagram for EvtBto2piCPiso:

Public Member Functions
	EvtBto2piCPiso ()
virtual	~EvtBto2piCPiso ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	init ()
void	initProbMax ()
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 27 of file EvtBto2piCPiso.hh.

Constructor & Destructor Documentation

EvtBto2piCPiso()

EvtBto2piCPiso::EvtBto2piCPiso ( )

inline

Definition at line 30 of file EvtBto2piCPiso.hh.

{}

Referenced by clone().

~EvtBto2piCPiso()

EvtBto2piCPiso::~EvtBto2piCPiso ( )

virtual

Definition at line 34 of file EvtBto2piCPiso.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtBto2piCPiso::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 38 of file EvtBto2piCPiso.cc.

{ return new EvtBto2piCPiso; }

decay()

void EvtBto2piCPiso::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 78 of file EvtBto2piCPiso.cc.

                                           {
 
  p->initializePhaseSpace( getNDaug(), getDaugs() );
 
  // added by Lange Jan4,2000
  static EvtId B0  = EvtPDL::getId( "B0" );
  static EvtId B0B = EvtPDL::getId( "anti-B0" );
  static EvtId PI0 = EvtPDL::getId( "pi0" );
  static EvtId PIP = EvtPDL::getId( "pi+" );
  static EvtId PIM = EvtPDL::getId( "pi-" );
 
  double t;
  EvtId  other_b;
  int    charged = 0;
 
  // 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;
  }
 
  EvtComplex amp;
 
  EvtComplex A, Abar;
  EvtComplex A2, A2_bar, A0, A0_bar;
 
  A2     = EvtComplex( getArg( 2 ) * cos( getArg( 3 ) ), getArg( 2 ) * sin( getArg( 3 ) ) );
  A2_bar = EvtComplex( getArg( 4 ) * cos( getArg( 5 ) ), getArg( 4 ) * sin( getArg( 5 ) ) );
 
  A0     = EvtComplex( getArg( 6 ) * cos( getArg( 7 ) ), getArg( 6 ) * sin( getArg( 7 ) ) );
  A0_bar = EvtComplex( getArg( 8 ) * cos( getArg( 9 ) ), getArg( 8 ) * sin( getArg( 9 ) ) );
 
  // depending on what combination of pi pi we have, there will be different
  // A and Abar
 
  if ( ( ( getDaugs()[0] == PIP ) && ( getDaugs()[1] == PI0 ) ) ||
       ( ( getDaugs()[0] == PI0 ) && ( getDaugs()[1] == PIP ) ) )
  {
 
    // pi+ pi0, so just A_2
 
    charged = 1;
    A       = 3.0 * A2;
  }
 
  if ( ( ( getDaugs()[0] == PI0 ) && ( getDaugs()[1] == PIM ) ) ||
       ( ( getDaugs()[0] == PIM ) && ( getDaugs()[1] == PI0 ) ) )
  {
 
    // pi- pi0, so just A2_bar
 
    charged = 1;
    A       = 3.0 * A2_bar;
  }
 
  if ( ( ( getDaugs()[0] == PIP ) && ( getDaugs()[1] == PIM ) ) ||
       ( ( getDaugs()[0] == PIM ) && ( getDaugs()[1] == PIP ) ) )
  {
 
    // pi+ pi-, so A_2 - A_0
 
    charged = 0;
    A       = sqrt( 2.0 ) * ( A2 - A0 );
    Abar    = sqrt( 2.0 ) * ( A2_bar - A0_bar );
  }
 
  if ( ( getDaugs()[0] == PI0 ) && ( getDaugs()[1] == PI0 ) )
  {
 
    // pi0 pi0, so 2*A_2 + A_0
 
    charged = 0;
    A       = 2.0 * A2 + A0;
    Abar    = 2.0 * A2_bar + A0_bar;
  }
 
  if ( charged == 0 )
  {
 
    if ( other_b == B0B )
    {
      amp = A * cos( getArg( 1 ) * t / ( 2 * EvtConst::c ) ) +
            EvtComplex( cos( -2.0 * getArg( 0 ) ), sin( -2.0 * getArg( 0 ) ) ) *
                EvtComplex( 0.0, 1.0 ) * Abar * sin( getArg( 1 ) * 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( 1 ) * t / ( 2 * EvtConst::c ) ) +
            Abar * cos( getArg( 1 ) * t / ( 2 * EvtConst::c ) );
    }
  }
  else amp = A;
 
  vertex( amp );
 
  return;
}

getName()

void EvtBto2piCPiso::getName ( std::string & name )

virtual

Implements EvtDecayBase.

Definition at line 36 of file EvtBto2piCPiso.cc.

{ model_name = "BTO2PI_CP_ISO"; }

init()

void EvtBto2piCPiso::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 40 of file EvtBto2piCPiso.cc.

                          {
 
  // check that there are 11 arguments
 
  checkNArg( 11 );
  checkNDaug( 2 );
 
  checkSpinParent( EvtSpinType::SCALAR );
 
  checkSpinDaughter( 0, EvtSpinType::SCALAR );
  checkSpinDaughter( 1, EvtSpinType::SCALAR );
}

initProbMax()

void EvtBto2piCPiso::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 53 of file EvtBto2piCPiso.cc.

                                 {
 
  // added by Lange Jan4,2000
  static EvtId PI0 = EvtPDL::getId( "pi0" );
  static EvtId PIP = EvtPDL::getId( "pi+" );
  static EvtId PIM = EvtPDL::getId( "pi-" );
 
  // this may need to be revised
 
  if ( ( ( getDaugs()[0] == PIP ) && ( getDaugs()[1] == PIM ) ) ||
       ( ( getDaugs()[0] == PIM ) && ( getDaugs()[1] == PIP ) ) )
  { setProbMax( 4.0 * ( getArg( 2 ) * getArg( 2 ) + getArg( 4 ) * getArg( 4 ) ) ); }
 
  if ( ( getDaugs()[0] == PI0 ) && ( getDaugs()[1] == PI0 ) )
  { setProbMax( 2.0 * ( 4.0 * getArg( 2 ) * getArg( 2 ) + getArg( 4 ) * getArg( 4 ) ) ); }
 
  if ( ( ( getDaugs()[0] == PIP ) && ( getDaugs()[1] == PI0 ) ) ||
       ( ( getDaugs()[0] == PI0 ) && ( getDaugs()[1] == PIP ) ) )
  { setProbMax( 6.0 * getArg( 2 ) * getArg( 2 ) ); }
 
  if ( ( ( getDaugs()[0] == PI0 ) && ( getDaugs()[1] == PIM ) ) ||
       ( ( getDaugs()[0] == PIM ) && ( getDaugs()[1] == PI0 ) ) )
  { setProbMax( 6.0 * getArg( 4 ) * getArg( 4 ) ); }
}

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

• EvtBto2piCPiso.hh
• EvtBto2piCPiso.cc