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 22 of file EvtTwoBodyVertex.cc.

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

EvtTwoBodyVertex() [2/3]

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

Definition at line 26 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 39 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 44 of file EvtTwoBodyVertex.cc.

{
  if(_f) delete _f;
}

Member Function Documentation

formFactor()

double EvtTwoBodyVertex::formFactor

(

EvtTwoBodyKine

x

)

const

Definition at line 77 of file EvtTwoBodyVertex.cc.

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

Referenced by EvtPto3PAmp::amplitude(), EvtMassAmp::amplitude(), EvtDalitzReso::evaluate(), and widthFactor().

L()

int EvtTwoBodyVertex::L ( ) const

inline

Definition at line 34 of file EvtTwoBodyVertex.hh.

{ return _LL; }

Referenced by EvtMassAmp::amplitude().

mA()

double EvtTwoBodyVertex::mA ( ) const

inline

Definition at line 35 of file EvtTwoBodyVertex.hh.

{ return _kine.mA(); }

Referenced by EvtMassAmp::amplitude(), EvtTwoBodyVertex(), and print().

mAB()

double EvtTwoBodyVertex::mAB ( ) const

inline

Definition at line 37 of file EvtTwoBodyVertex.hh.

{ return _kine.mAB(); }

Referenced by EvtMassAmp::amplitude(), EvtTwoBodyVertex(), print(), and widthFactor().

mB()

double EvtTwoBodyVertex::mB ( ) const

inline

Definition at line 36 of file EvtTwoBodyVertex.hh.

{ return _kine.mB(); }

Referenced by EvtMassAmp::amplitude(), EvtTwoBodyVertex(), and print().

pD()

double EvtTwoBodyVertex::pD ( ) const

inline

Definition at line 38 of file EvtTwoBodyVertex.hh.

{ return _p0; }

Referenced by EvtMassAmp::amplitude(), EvtDalitzReso::evaluate(), and EvtAbsLineShape::getRandMass().

phaseSpaceFactor()

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

Definition at line 69 of file EvtTwoBodyVertex.cc.

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

Referenced by EvtMassAmp::amplitude(), and EvtPto3PAmp::numerator().

print()

void EvtTwoBodyVertex::print

(

std::ostream &

os

)

const

Definition at line 90 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 50 of file EvtTwoBodyVertex.cc.

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

Referenced by EvtRelBreitWignerBarrierFact::getRandMass(), EvtDalitzReso::set_fb(), EvtPto3PAmp::set_fb(), EvtDalitzReso::set_fd(), and EvtPto3PAmp::set_fd().

widthFactor()

double EvtTwoBodyVertex::widthFactor

(

EvtTwoBodyKine

x

)

const

Definition at line 57 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;
}

Referenced by EvtPto3PAmp::amplitude(), EvtMassAmp::amplitude(), and EvtDalitzReso::evaluate().

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

• EvtTwoBodyVertex.hh
• EvtTwoBodyVertex.cc