twobodyphasespace.h

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//
// Authors: Valerio Bertone: valerio.bertone@cern.ch
//          Fulvio Piacenza: fulvio.piacenza01@universitadipavia.it
//
 
#pragma once
 
namespace apfel
{
  class TwoBodyPhaseSpace
  {
  public:
    TwoBodyPhaseSpace(double const& pTmin1, double const& pTmin2, double const& etamin, double const& etamax, double const& eps);
 
    TwoBodyPhaseSpace(double const& pTmin, double const& etamin, double const& etamax, double const& eps = 1e-9);
 
    double PhaseSpaceReduction(double const& Q, double const& y, double const& qT);
 
    double DerivePhaseSpaceReduction(double const& Q, double const& y, double const& qT);
 
    double ParityViolatingPhaseSpaceReduction(double const& Q, double const& y, double const& qT);
 
  private:
    double const _pTmin1;
    double const _pTmin2;
    double const _etamin;
    double const _etamax;
    double const _eps;
  };
}