EvtBSemiTauonicAmplitude.h

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/**************************************************************************
 * BASF2 (Belle Analysis Framework 2)                                     *
 * Copyright(C) 2013 - Belle II Collaboration                             *
 *                                                                        *
 * Author: The Belle II Collaboration                                     *
 * Contributors: Koji Hara                                                *
 *                                                                        *
 * This software is provided "as is" without any warranty.                *
 **************************************************************************/
#pragma once
 
class EvtParticle;
class EvtAmp;
class EvtSpinDensity;
 
namespace Belle2 {
  class EvtBSemiTauonicHelicityAmplitudeCalculator;

  class EvtBSemiTauonicAmplitude {
  public:

    EvtBSemiTauonicAmplitude() {};

    virtual ~EvtBSemiTauonicAmplitude() {};
 

    virtual void CalcAmp(EvtParticle* parent, EvtAmp& amp,
                         EvtBSemiTauonicHelicityAmplitudeCalculator* HelicityAmplitudeCalculator) = 0;

    double CalcMaxProb(EvtId parent, EvtId meson, EvtId lepton,
                       EvtId nudaug,
                       EvtBSemiTauonicHelicityAmplitudeCalculator* HelicityAmplitudeCalculator);

    EvtSpinDensity RotateToHelicityBasisInBoostedFrame(const EvtParticle* p,
                                                       EvtVector4R p4boost);
 
  };
 
} // Belle 2 Namespace