FSRWeightAlgo.h

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#ifndef PhysicsTools_Heppy_FSRWeightAlgo_h
#define PhysicsTools_Heppy_FSRWeightAlgo_h
 
#include "DataFormats/HepMCCandidate/interface/GenParticle.h"
 
namespace heppy {
 
  class FSRWeightAlgo {
  public:
    FSRWeightAlgo() {}
    virtual ~FSRWeightAlgo() {}
    void addGenParticle(const reco::GenParticle& gen) { genParticles_.push_back(gen); }
    void clear() { genParticles_.clear(); }
    double weight() const;
 
  private:
    double alphaRatio(double) const;
 
    std::vector<reco::GenParticle> genParticles_;
  };
}  // namespace heppy
#endif