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File indexing completed on 2021-02-14 13:32:26

0001 #ifndef PhysicsTools_Heppy_FSRWeightAlgo_h
0002 #define PhysicsTools_Heppy_FSRWeightAlgo_h
0003 
0004 #include "DataFormats/HepMCCandidate/interface/GenParticle.h"
0005 
0006 namespace heppy {
0007 
0008   class FSRWeightAlgo {
0009   public:
0010     FSRWeightAlgo() {}
0011     virtual ~FSRWeightAlgo() {}
0012     void addGenParticle(const reco::GenParticle& gen) { genParticles_.push_back(gen); }
0013     void clear() { genParticles_.clear(); }
0014     double weight() const;
0015 
0016   private:
0017     double alphaRatio(double) const;
0018 
0019     std::vector<reco::GenParticle> genParticles_;
0020   };
0021 }  // namespace heppy
0022 #endif