include/EvtGenBase/EvtGenKine.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
0005 * This file is part of EvtGen.                                         *
0006 *                                                                      *
0007 * EvtGen is free software: you can redistribute it and/or modify       *
0008 * it under the terms of the GNU General Public License as published by *
0009 * the Free Software Foundation, either version 3 of the License, or    *
0010 * (at your option) any later version.                                  *
0011 *                                                                      *
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0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
0015 * GNU General Public License for more details.                         *
0016 *                                                                      *
0017 * You should have received a copy of the GNU General Public License    *
0018 * along with EvtGen.  If not, see <https://www.gnu.org/licenses/>.     *
0019 ***********************************************************************/
0020
0021 #ifndef EVTGENKINE_HH
0022 #define EVTGENKINE_HH
0023
0024 class EvtVector4R;
0025 class EvtParticle;
0026
0027 class EvtGenKine {
0028   public:
0029     static double PhaseSpace( int ndaug, double mass[30], EvtVector4R p4[30],
0030                               double mp );
0031
0032     static double PhaseSpacePole( double M, double m1, double m2, double m3,
0033                                   double a, EvtVector4R p4[10] );
0034
0035     /*
0036      * Function which takes two invariant masses squared in 3-body decay and
0037      * parent after makeDaughters() and generateMassTree() and
0038      * calculates/generates momenta of daughters and sets those.
0039      */
0040     static void ThreeBodyKine( const double m12Sq, const double m23Sq,
0041                                EvtParticle* p );
0042 };
0043
0044 #endif