EvtSVPCP Class Reference

#include <EvtSVPCP.hh>

Inheritance diagram for EvtSVPCP:

Public Member Functions
	EvtSVPCP ()
virtual	~EvtSVPCP ()
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 ()

Static Public Member Functions
static void	SVPHel (EvtParticle *parent, EvtAmp &amp, EvtId n_v1, EvtId n_v2, const EvtComplex &hp, const EvtComplex &hm)
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)

Additional Inherited Members
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 36 of file EvtSVPCP.hh.

Constructor & Destructor Documentation

EvtSVPCP()

EvtSVPCP::EvtSVPCP ( )

inline

Definition at line 39 of file EvtSVPCP.hh.

{}

Referenced by clone().

~EvtSVPCP()

EvtSVPCP::~EvtSVPCP ( )

virtual

Definition at line 38 of file EvtSVPCP.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtSVPCP::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 42 of file EvtSVPCP.cc.

{ return new EvtSVPCP; }

decay()

void EvtSVPCP::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 61 of file EvtSVPCP.cc.

                                     {
 
  static EvtId B0  = EvtPDL::getId( "B0" );
  static EvtId B0B = EvtPDL::getId( "anti-B0" );
 
  double t;
  EvtId  other_b;
 
  EvtCPUtil::OtherB( p, t, other_b );
 
  EvtComplex G1P, G1M, G1_T_even, G1_T_odd;
 
  double norm = getArg( 3 ) * getArg( 3 ) + getArg( 5 ) * getArg( 5 );
 
  G1P = EvtComplex( getArg( 3 ) * cos( getArg( 4 ) ) / norm,
                    getArg( 3 ) * sin( getArg( 4 ) ) / norm );
  G1M = EvtComplex( getArg( 5 ) * cos( getArg( 6 ) ) / norm,
                    getArg( 5 ) * sin( getArg( 6 ) ) / norm );
 
  G1_T_even = ( G1P + G1M ) / sqrt( 2.0 );
  G1_T_odd  = ( G1P - G1M ) / sqrt( 2.0 );
 
  EvtComplex lambda_km = EvtComplex( cos( -2 * getArg( 0 ) ), sin( -2 * getArg( 0 ) ) );
 
  double cdmt = cos( getArg( 1 ) * t / ( 2 * EvtConst::c ) );
  double sdmt = sin( getArg( 1 ) * t / ( 2 * EvtConst::c ) );
 
  EvtComplex cG1_T_even, cG1_T_odd;
 
  if ( other_b == B0B )
  {
    cG1_T_even = G1_T_even * ( cdmt + lambda_km * EvtComplex( 0.0, getArg( 2 ) * sdmt ) );
    cG1_T_odd  = G1_T_odd * ( cdmt - lambda_km * EvtComplex( 0.0, getArg( 2 ) * sdmt ) );
  }
  if ( other_b == B0 )
  {
    cG1_T_even =
        G1_T_even * ( cdmt + ( 1.0 / lambda_km ) * EvtComplex( 0.0, getArg( 2 ) * sdmt ) );
    cG1_T_odd =
        -G1_T_odd * ( cdmt - ( 1.0 / lambda_km ) * EvtComplex( 0.0, getArg( 2 ) * sdmt ) );
  }
 
  EvtComplex hp, hm, h0;
 
  // This part is adopted from EvtSVVHel and since there is
  // a photon that can not have helicity 0 this is put in by
  // setting the h0 amplitude to 0.
  hm = ( cG1_T_even - cG1_T_odd ) / sqrt( 2.0 );
  hp = ( cG1_T_even + cG1_T_odd ) / sqrt( 2.0 );
  h0 = EvtComplex( 0.0, 0.0 );
 
  EvtParticle *v1, *ph;
 
  p->initializePhaseSpace( getNDaug(), getDaugs() );
  v1                = p->getDaug( 0 );
  ph                = p->getDaug( 1 );
  EvtVector4R momv1 = v1->getP4();
  EvtVector4R momph = ph->getP4();
 
  EvtTensor4C d, g;
 
  g.setdiag( 1.0, -1.0, -1.0, -1.0 );
 
  EvtVector4R v, vp;
 
  v  = momv1 / momv1.d3mag();
  vp = ( momv1 + momph ) / ( momv1 + momph ).mass();
 
  d = ( ( 1.0 / sqrt( 3.0 ) ) * ( h0 - ( hp + hm ) ) * ( -1.0 / sqrt( 3.0 ) ) ) * g +
      ( ( 1.0 / sqrt( 2.0 ) ) * ( hp - hm ) * EvtComplex( 0.0, 1.0 ) *
        ( sqrt( 1.0 / 2.0 ) ) ) *
          dual( directProd( v, vp ) ) +
      ( sqrt( 2.0 / 3.0 ) * ( h0 + 0.5 * ( hp + hm ) ) * sqrt( 3.0 / 2.0 ) ) *
          ( directProd( v, v ) + ( 1.0 / 3.0 ) * g );
 
  EvtVector4C ep0, ep1, ep2;
 
  ep0 = d.cont1( v1->eps( 0 ).conj() );
  ep1 = d.cont1( v1->eps( 1 ).conj() );
  ep2 = d.cont1( v1->eps( 2 ).conj() );
 
  EvtVector4C ep20, ep21, ep22;
 
  ep20 = ph->epsParentPhoton( 0 ).conj();
  ep21 = ph->epsParentPhoton( 1 ).conj();
 
  vertex( 0, 0, ep0 * ep20 );
  vertex( 0, 1, ep0 * ep21 );
 
  vertex( 1, 0, ep1 * ep20 );
  vertex( 1, 1, ep1 * ep21 );
 
  vertex( 2, 0, ep2 * ep20 );
  vertex( 2, 1, ep2 * ep21 );
 
  return;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 40 of file EvtSVPCP.cc.

{ model_name = "SVP_CP"; }

init()

void EvtSVPCP::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 49 of file EvtSVPCP.cc.

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

initProbMax()

void EvtSVPCP::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 44 of file EvtSVPCP.cc.

                           {
 
  setProbMax( 2 * ( getArg( 3 ) * getArg( 3 ) + getArg( 5 ) * getArg( 5 ) ) );
}

SVPHel()

void EvtSVPCP::SVPHel ( EvtParticle * parent, EvtAmp & amp, EvtId n_v1, EvtId n_v2, const EvtComplex & hp, const EvtComplex & hm )

static

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

• EvtSVPCP.hh
• EvtSVPCP.cc