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StarGenerator
EvtGen1_06_00
EvtGenBase
EvtTwoBodyKine.hh
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/*******************************************************************************
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* Project: BaBar detector at the SLAC PEP-II B-factory
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* Package: EvtGenBase
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* File: $Id: EvtTwoBodyKine.hh,v 1.1 2016/09/23 18:37:33 jwebb Exp $
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* Author: Alexei Dvoretskii, dvoretsk@slac.stanford.edu, 2001-2002
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*
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* Copyright (C) 2002 Caltech
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*******************************************************************************/
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// Descriptions of the kinematics of a two-body decay.
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#ifndef EVT_TWO_BODY_KINE_HH
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#define EVT_TWO_BODY_KINE_HH
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#include <iostream>
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class
EvtTwoBodyKine
{
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public
:
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enum
Index {A,B,AB};
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EvtTwoBodyKine
();
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EvtTwoBodyKine
(
double
mA,
double
mB,
double
mAB);
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EvtTwoBodyKine
(
const
EvtTwoBodyKine
& other);
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~
EvtTwoBodyKine
();
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// Accessors
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inline
double
mA()
const
{
return
_mA; }
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inline
double
mB()
const
{
return
_mB; }
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inline
double
mAB()
const
{
return
_mAB; }
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double
m(Index i)
const
;
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// Momentum of the other two particles in the
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// rest-frame of particle i.
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double
p(Index i = AB)
const
;
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// Energy of particle i in the rest frame of particle j
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double
e(Index i, Index j)
const
;
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void
print(std::ostream& os)
const
;
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private
:
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double
_mA;
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double
_mB;
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double
_mAB;
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};
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std::ostream& operator<<(std::ostream& os,
const
EvtTwoBodyKine
& p);
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#endif
EvtTwoBodyKine
Definition:
EvtTwoBodyKine.hh:17
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