EvtTwoBodyVertex Class Reference

#include <EvtTwoBodyVertex.hh>

List of all members.

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)
Private Attributes
EvtTwoBodyKine	_kine
int	_LL
double	_p0
EvtBlattWeisskopf *	_f

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Detailed Description

Definition at line 21 of file EvtTwoBodyVertex.hh.

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Constructor & Destructor Documentation

EvtTwoBodyVertex::EvtTwoBodyVertex

(

)

Definition at line 22 of file EvtTwoBodyVertex.cc.

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

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

Definition at line 26 of file EvtTwoBodyVertex.cc.

References _kine, _p0, and EvtTwoBodyKine::p().

  : _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::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

(

)

Definition at line 44 of file EvtTwoBodyVertex.cc.

References _f.

{
  if(_f) delete _f;
}

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Member Function Documentation

double EvtTwoBodyVertex::formFactor

(

EvtTwoBodyKine

x

)

const

Definition at line 77 of file EvtTwoBodyVertex.cc.

References _f, and x.

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

{
  double ff = 1.;

  if(_f) {

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

int EvtTwoBodyVertex::L

(

)

const [inline]

Definition at line 34 of file EvtTwoBodyVertex.hh.

References _LL.

Referenced by EvtMassAmp::amplitude().

{ return _LL; }

double EvtTwoBodyVertex::mA

(

)

const [inline]

Definition at line 35 of file EvtTwoBodyVertex.hh.

References _kine, and EvtTwoBodyKine::mA().

Referenced by EvtMassAmp::amplitude().

{ return _kine.mA(); }

double EvtTwoBodyVertex::mAB

(

)

const [inline]

Definition at line 37 of file EvtTwoBodyVertex.hh.

References _kine, and EvtTwoBodyKine::mAB().

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

{ return _kine.mAB(); }

double EvtTwoBodyVertex::mB

(

)

const [inline]

Definition at line 36 of file EvtTwoBodyVertex.hh.

References _kine, and EvtTwoBodyKine::mB().

Referenced by EvtMassAmp::amplitude().

{ return _kine.mB(); }

double EvtTwoBodyVertex::pD

(

)

const [inline]

Definition at line 38 of file EvtTwoBodyVertex.hh.

References _p0.

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

{ return _p0; }

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

Definition at line 69 of file EvtTwoBodyVertex.cc.

References _LL, and x.

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

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

void EvtTwoBodyVertex::print

(

std::ostream &

os

)

const

void EvtTwoBodyVertex::set_f

(

double

R

)

Definition at line 50 of file EvtTwoBodyVertex.cc.

References _f, _LL, and _p0.

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

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

double EvtTwoBodyVertex::widthFactor

(

EvtTwoBodyKine

x

)

const

Definition at line 57 of file EvtTwoBodyVertex.cc.

References _LL, _p0, formFactor(), mAB(), and x.

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

{
  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 

  return factor;
}

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Member Data Documentation

EvtBlattWeisskopf* EvtTwoBodyVertex::_f [private]

Definition at line 48 of file EvtTwoBodyVertex.hh.

Referenced by formFactor(), set_f(), and ~EvtTwoBodyVertex().

EvtTwoBodyKine EvtTwoBodyVertex::_kine [private]

Definition at line 45 of file EvtTwoBodyVertex.hh.

Referenced by EvtTwoBodyVertex(), mA(), mAB(), and mB().

int EvtTwoBodyVertex::_LL [private]

Definition at line 46 of file EvtTwoBodyVertex.hh.

Referenced by L(), phaseSpaceFactor(), set_f(), and widthFactor().

double EvtTwoBodyVertex::_p0 [private]

Definition at line 47 of file EvtTwoBodyVertex.hh.

Referenced by EvtTwoBodyVertex(), pD(), set_f(), and widthFactor().

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