EvtTwoBodyVertex Class Reference

#include <EvtTwoBodyVertex.hh>

Public Member Functions
	EvtTwoBodyVertex ()
	EvtTwoBodyVertex (double mA, double mB, double mAB, int L)
	EvtTwoBodyVertex (const EvtTwoBodyVertex &other)
	~EvtTwoBodyVertex ()
double	widthFactor (EvtTwoBodyKine x) const
double	formFactor (EvtTwoBodyKine x) const
double	phaseSpaceFactor (EvtTwoBodyKine x, EvtTwoBodyKine::Index) const
int	L () const
double	mA () const
double	mB () const
double	mAB () const
double	pD () const
void	print (std::ostream &os) const
void	set_f (double R)

Detailed Description

Definition at line 21 of file EvtTwoBodyVertex.hh.

Constructor & Destructor Documentation

EvtTwoBodyVertex() [1/3]

EvtTwoBodyVertex::EvtTwoBodyVertex

(

)

Definition at line 21 of file EvtTwoBodyVertex.cc.

: _LL( 0 ), _p0( 0 ), _f( 0 ) {}

Referenced by EvtTwoBodyVertex().

EvtTwoBodyVertex() [2/3]

EvtTwoBodyVertex::EvtTwoBodyVertex	(	double	mA,
		double	mB,
		double	mAB,
		int	L )

Definition at line 23 of file EvtTwoBodyVertex.cc.

    : _kine(), _LL( L ), _p0( 0 ), _f( 0 ) {
  // Kinematics is initialized only if the decay is above threshold
 
  if ( mAB > mA + mB )
  {
 
    _kine = EvtTwoBodyKine( mA, mB, mAB );
    _p0   = _kine.p();
  }
}

EvtTwoBodyVertex() [3/3]

EvtTwoBodyVertex::EvtTwoBodyVertex

(

const EvtTwoBodyVertex &

other

)

Definition at line 35 of file EvtTwoBodyVertex.cc.

    : _kine( other._kine )
    , _LL( other._LL )
    , _p0( other._p0 )
    , _f( ( other._f ) ? new EvtBlattWeisskopf( *other._f ) : 0 ) {}

~EvtTwoBodyVertex()

EvtTwoBodyVertex::~EvtTwoBodyVertex

(

)

Definition at line 41 of file EvtTwoBodyVertex.cc.

                                    {
  if ( _f ) delete _f;
}

Member Function Documentation

formFactor()

double EvtTwoBodyVertex::formFactor

(

EvtTwoBodyKine

x

)

const

Definition at line 67 of file EvtTwoBodyVertex.cc.

                                                            {
  double ff = 1.;
 
  if ( _f )
  {
 
    double p1 = x.p();
    ff        = ( *_f )( p1 );
  }
 
  return ff;
}

Referenced by widthFactor().

L()

int EvtTwoBodyVertex::L ( ) const

inline

Definition at line 33 of file EvtTwoBodyVertex.hh.

{ return _LL; }

Referenced by EvtTwoBodyVertex().

mA()

double EvtTwoBodyVertex::mA ( ) const

inline

Definition at line 34 of file EvtTwoBodyVertex.hh.

{ return _kine.mA(); }

Referenced by EvtTwoBodyVertex(), and print().

mAB()

double EvtTwoBodyVertex::mAB ( ) const

inline

Definition at line 36 of file EvtTwoBodyVertex.hh.

{ return _kine.mAB(); }

Referenced by EvtTwoBodyVertex(), print(), and widthFactor().

mB()

double EvtTwoBodyVertex::mB ( ) const

inline

Definition at line 35 of file EvtTwoBodyVertex.hh.

{ return _kine.mB(); }

Referenced by EvtTwoBodyVertex(), and print().

pD()

double EvtTwoBodyVertex::pD ( ) const

inline

Definition at line 37 of file EvtTwoBodyVertex.hh.

{ return _p0; }

Referenced by EvtAbsLineShape::getRandMass().

phaseSpaceFactor()

double EvtTwoBodyVertex::phaseSpaceFactor	(	EvtTwoBodyKine	x,
		EvtTwoBodyKine::Index	i ) const

Definition at line 61 of file EvtTwoBodyVertex.cc.

                                                                                         {
  double p1     = x.p( i );
  double factor = pow( p1, _LL );
  return factor;
}

print()

void EvtTwoBodyVertex::print

(

std::ostream &

os

)

const

Definition at line 80 of file EvtTwoBodyVertex.cc.

                                                {
  os << " mA = " << mA() << endl;
  os << " mB = " << mB() << endl;
  os << "mAB = " << mAB() << endl;
  os << "  L = " << _LL << endl;
  os << " p0 = " << _p0 << endl;
}

set_f()

void EvtTwoBodyVertex::set_f

(

double

R

)

Definition at line 45 of file EvtTwoBodyVertex.cc.

                                       {
  if ( _f ) delete _f;
  _f = new EvtBlattWeisskopf( _LL, R, _p0 );
}

Referenced by EvtRelBreitWignerBarrierFact::getRandMass().

widthFactor()

double EvtTwoBodyVertex::widthFactor

(

EvtTwoBodyKine

x

)

const

Definition at line 50 of file EvtTwoBodyVertex.cc.

                                                             {
  assert( _p0 > 0. );
 
  double p1     = x.p();
  double ff     = formFactor( x );
  double factor = pow( p1 / _p0, 2 * _LL + 1 ) * pow( mAB() / x.mAB(), 2 ) * ff *
                  ff; // pingrg,2008-11-24, in EvtGen Manual Eq 66, (m0/m) should be squared
  // see PLB537,201; PLB561, 55; ZPC48, 445, and PRD65, 032002, PRD68, 052006
  return factor;
}

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

• EvtTwoBodyVertex.hh
• EvtTwoBodyVertex.cc