EvtAngSam3 Class Reference

#include <EvtAngSam3.hh>

Inheritance diagram for EvtAngSam3:

Public Member Functions
	EvtAngSam3 ()
virtual	~EvtAngSam3 ()
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 EvtAngSam3.hh.

Constructor & Destructor Documentation

EvtAngSam3()

EvtAngSam3::EvtAngSam3 ( )

inline

Definition at line 32 of file EvtAngSam3.hh.

{}

Referenced by clone().

~EvtAngSam3()

EvtAngSam3::~EvtAngSam3 ( )

virtual

Definition at line 48 of file EvtAngSam3.cc.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtAngSam3::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 52 of file EvtAngSam3.cc.

{ return new EvtAngSam3; }

decay()

void EvtAngSam3::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 70 of file EvtAngSam3.cc.

                                       {
 
loop:
  p->initializePhaseSpace( getNDaug(), getDaugs() );
 
  EvtParticle *v, *s1, *s2;
  EvtVector4R  pv, ps;
  EvtVector4R  Lpt, xp;
 
  v   = p->getDaug( 0 );
  s1  = p->getDaug( 1 );
  s2  = p->getDaug( 2 );
  pv  = v->getP4();
  ps  = s1->getP4();
  Lpt = p->getP4();
  xp  = pv.cross( ps );
 
  // calculate the cos (theta) between xp and Lpt
  double costheta;
  if ( Lpt.d3mag() < 0.0001 ) { costheta = xp.get( 3 ) / xp.d3mag(); }
  else
  {
    costheta = ( xp.get( 1 ) * Lpt.get( 1 ) + xp.get( 2 ) * Lpt.get( 2 ) +
                 xp.get( 3 ) * Lpt.get( 3 ) ) /
               xp.d3mag() / Lpt.d3mag();
  }
  int    narg = getNArg();
  double c0, c2, c4, c6, c8, c10;
  c0  = 0;
  c2  = 0;
  c4  = 0;
  c6  = 0;
  c8  = 0;
  c10 = 0;
  if ( narg == 2 )
  {
    c0 = getArg( 0 );
    c2 = getArg( 1 );
  }
  else if ( narg == 3 )
  {
    c0 = getArg( 0 );
    c2 = getArg( 1 );
    c4 = getArg( 2 );
  }
  else if ( narg == 4 )
  {
    c0 = getArg( 0 );
    c2 = getArg( 1 );
    c4 = getArg( 2 );
    c6 = getArg( 3 );
  }
  else if ( narg == 5 )
  {
    c0 = getArg( 0 );
    c2 = getArg( 1 );
    c4 = getArg( 2 );
    c6 = getArg( 3 );
    c8 = getArg( 4 );
  }
  else if ( narg == 6 )
  {
    c0  = getArg( 0 );
    c2  = getArg( 1 );
    c4  = getArg( 2 );
    c6  = getArg( 3 );
    c8  = getArg( 4 );
    c10 = getArg( 5 );
  }
 
  double costheta2  = costheta * costheta;
  double costheta4  = costheta2 * costheta2;
  double costheta6  = costheta4 * costheta2;
  double costheta8  = costheta6 * costheta2;
  double costheta10 = costheta8 * costheta2;
 
  double amp1 = ( c0 + c2 * costheta2 + c4 * costheta4 + c6 * costheta6 + c8 * costheta8 +
                  c10 * costheta10 );
  double a0, a2, a4, a6, a8, a10;
  double ampflag;
  if ( c0 < 0 ) { a0 = 0; }
  else { a0 = c0; }
  if ( c2 < 0 ) { a2 = 0; }
  else { a2 = c2; }
  if ( c4 < 0 ) { a4 = 0; }
  else { a4 = c4; }
  if ( c6 < 0 ) { a6 = 0; }
  else { a6 = c6; }
  if ( c8 < 0 ) { a8 = 0; }
  else { a8 = c8; }
  if ( c10 < 0 ) { a10 = 0; }
  else { a10 = c10; }
  ampflag = a0 + a2 + a4 + a6 + a8 + a10;
  if ( ampflag <= 0 )
  {
    report( ERROR, "EvtGen" )
        << " The maxium value of amplitude square should be positive, but it is " << ampflag
        << endl;
    ::abort();
  }
  ampflag    = amp1 / ampflag;
  double rd1 = EvtRandom::Flat( 0.0, 1.0 );
  if ( rd1 >= ampflag ) goto loop;
  return;
}

getName()

void EvtAngSam3::getName ( std::string & name )

virtual

Implements EvtDecayBase.

Definition at line 50 of file EvtAngSam3.cc.

{ model_name = "AngSam3"; }

init()

void EvtAngSam3::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 54 of file EvtAngSam3.cc.

                      {
 
  // check angular distribution parameters
  checkNDaug( 3 );
  EvtSpinType::spintype parenttype = EvtPDL::getSpinType( getParentId() );
 
  if ( getNArg() > 6 || getNArg() < 2 )
  {
    report( ERROR, "EvtGen" ) << "  2<= expected parameters <=6, but it is " << getNArg()
                              << endl;
    ::abort();
  }
}

initProbMax()

void EvtAngSam3::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 68 of file EvtAngSam3.cc.

{ noProbMax(); }

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

• EvtAngSam3.hh
• EvtAngSam3.cc