PhaseSpaceFactor.h

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/*  YAP - Yet another PWA toolkit
    Copyright 2015, Technische Universitaet Muenchen,
    Authors: Daniel Greenwald, Johannes Rauch

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


#ifndef yap_PhaseSpaceFactor_h
#define yap_PhaseSpaceFactor_h

#include "fwd/PhaseSpaceFactor.h"

#include "fwd/DataPoint.h"
#include "fwd/DecayChannel.h"
#include "fwd/MassShape.h"
#include "fwd/ParticleCombination.h"
#include "fwd/SpinAmplitude.h"

#include "AmplitudeComponent.h"

#include <complex>
#include <memory>

namespace yap {

class PhaseSpaceFactor : public RecalculableAmplitudeComponent
{
public:
    PhaseSpaceFactor(const ParticleCombinationEqualTo& equal)
        : RecalculableAmplitudeComponent(equal) {}
    
    friend class DecayChannel;
};

class PhaseSpaceFactorFactory
{
protected:

    virtual std::shared_ptr<PhaseSpaceFactor> phaseSpaceFactor(const DecayChannel& dc, const SpinAmplitude& sa, std::shared_ptr<MassShape> ms) = 0;

    friend class DecayingParticle;

    friend class Resonance;
};

}

#endif