Beam.hh

// -*- C++ -*-
#ifndef RIVET_Beam_HH
#define RIVET_Beam_HH
 
#include "Rivet/Projection.hh"
#include "Rivet/Event.hh"
#include "Rivet/Particle.hh"
#include "Rivet/Tools/Beams.hh"
#include "Rivet/Math/LorentzTrans.hh"
 
namespace Rivet {
 

  class Beam : public Projection {
  public:

    using Projection::operator=;

    Beam() { setName("Beam"); }

    RIVET_DEFAULT_PROJ_CLONE(Beam);
 


    const ParticlePair& beams() const { return _theBeams; }

    double sqrtS() const { return Rivet::sqrtS(beams()); }

    FourMomentum cmsBoostVec() const { return Rivet::cmsBoostVec(beams()); }

    LorentzTransform cmsTransform() const { return Rivet::cmsTransform(beams()); }

    Vector3 cmsBetaVec() const { return Rivet::cmsBetaVec(beams()); }

    Vector3 cmsGammaVec() const { return Rivet::cmsGammaVec(beams()); }

 


    double asqrtS() const { return Rivet::asqrtS(beams()); }

    Vector3 acmsBetaVec() const { return Rivet::acmsBetaVec(beams()); }

    Vector3 acmsGammaVec() const { return Rivet::acmsGammaVec(beams()); }

    LorentzTransform acmsTransform() const { return Rivet::acmsTransform(beams()); }

 

    FourVector pv() const;
 

    virtual void project(const Event& e);
 
 
  protected:

    ParticlePair _theBeams;
 
 
  protected:

    virtual CmpState compare(const Projection&) const { return CmpState::EQ; }
 
  };
 
 
}
 
#endif