EvtDalitzFlatPdf Class Reference

#include <EvtDalitzFlatPdf.hh>

Inheritance diagram for EvtDalitzFlatPdf:

Public Member Functions
	EvtDalitzFlatPdf (const EvtDalitzPlot &dp)
	EvtDalitzFlatPdf (const EvtDalitzFlatPdf &other)
virtual	~EvtDalitzFlatPdf ()
virtual EvtPdf< EvtDalitzPoint > *	clone () const
virtual EvtValError	compute_integral (int N) const
virtual EvtDalitzPoint	randomPoint ()
Public Member Functions inherited from EvtPdf< EvtDalitzPoint >
	EvtPdf ()
virtual	~EvtPdf ()
double	evaluate (const EvtDalitzPoint &p) const
EvtPdfMax< EvtDalitzPoint >	findMax (const EvtPdf< EvtDalitzPoint > &pc, int N)
EvtValError	findGenEff (const EvtPdf< EvtDalitzPoint > &pc, int N, int nFindMax)
void	setItg (EvtValError itg)
EvtValError	getItg () const
virtual EvtValError	compute_integral () const
EvtValError	compute_mc_integral (const EvtPdf< EvtDalitzPoint > &pc, int N)
EvtPredGen< EvtPdfGen< EvtDalitzPoint >, EvtPdfPred< EvtDalitzPoint > >	accRejGen (const EvtPdf< EvtDalitzPoint > &pc, int nMax, double factor=1.)

Protected Member Functions
virtual double	pdf (const EvtDalitzPoint &) const

Protected Attributes
EvtDalitzPlot	_dp
Protected Attributes inherited from EvtPdf< EvtDalitzPoint >
EvtValError	_itg

Detailed Description

Definition at line 22 of file EvtDalitzFlatPdf.hh.

Constructor & Destructor Documentation

EvtDalitzFlatPdf() [1/2]

EvtDalitzFlatPdf::EvtDalitzFlatPdf

(

const EvtDalitzPlot &

dp

)

Definition at line 15 of file EvtDalitzFlatPdf.cc.

    : EvtPdf<EvtDalitzPoint>(), _dp( dp ) {}

Referenced by clone(), and EvtDalitzFlatPdf().

EvtDalitzFlatPdf() [2/2]

EvtDalitzFlatPdf::EvtDalitzFlatPdf

(

const EvtDalitzFlatPdf &

other

)

Definition at line 18 of file EvtDalitzFlatPdf.cc.

    : EvtPdf<EvtDalitzPoint>( other ), _dp( other._dp ) {}

~EvtDalitzFlatPdf()

EvtDalitzFlatPdf::~EvtDalitzFlatPdf ( )

virtual

Definition at line 21 of file EvtDalitzFlatPdf.cc.

{}

Member Function Documentation

clone()

EvtPdf< EvtDalitzPoint > * EvtDalitzFlatPdf::clone ( ) const

virtual

Implements EvtPdf< EvtDalitzPoint >.

Definition at line 23 of file EvtDalitzFlatPdf.cc.

                                                      {
  return new EvtDalitzFlatPdf( *this );
}

compute_integral()

EvtValError EvtDalitzFlatPdf::compute_integral ( int N ) const

virtual

Definition at line 29 of file EvtDalitzFlatPdf.cc.

                                                            {
  return EvtValError( _dp.getArea( N ), 0. );
}

pdf()

double EvtDalitzFlatPdf::pdf ( const EvtDalitzPoint & ) const

protectedvirtual

Implements EvtPdf< EvtDalitzPoint >.

Definition at line 27 of file EvtDalitzFlatPdf.cc.

{ return 1.; }

randomPoint()

EvtDalitzPoint EvtDalitzFlatPdf::randomPoint ( )

virtual

Reimplemented from EvtPdf< EvtDalitzPoint >.

Definition at line 33 of file EvtDalitzFlatPdf.cc.

                                             {
  // To obtain a uniform distribution generate
  // in terms of q's. Generate in a box that circumscribes the
  // Dalitz plot. Accept points inside. If there are two
  // many unsuccessful attempts it's a hint that the Dalitz plot
  // area is tiny compared to the box. It's a pathological
  // case. Abort.
 
  EvtCyclic3::Pair pair1 = EvtCyclic3::BC;
  EvtCyclic3::Pair pair2 = EvtCyclic3::CA;
 
  int n        = 0;
  int maxTries = 1000;
  while ( n++ < maxTries )
  {
 
    double q1 = EvtRandom::Flat( _dp.qAbsMin( pair1 ), _dp.qAbsMax( pair2 ) );
    double q2 = EvtRandom::Flat( _dp.qAbsMin( pair2 ), _dp.qAbsMax( pair2 ) );
 
    EvtDalitzCoord point( pair1, q1, pair2, q2 );
    EvtDalitzPoint x( _dp, point );
 
    if ( x.isValid() ) return x;
  }
 
  printf( "No point generated for dalitz plot after %d tries\n", maxTries );
  abort();
}

Member Data Documentation

_dp

EvtDalitzPlot EvtDalitzFlatPdf::_dp

protected

Definition at line 35 of file EvtDalitzFlatPdf.hh.

Referenced by compute_integral(), EvtDalitzFlatPdf(), EvtDalitzFlatPdf(), and randomPoint().

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

• EvtDalitzFlatPdf.hh
• EvtDalitzFlatPdf.cc