EgHLTParticlePair.h

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#ifndef DQMOFFLINE_TRIGGER_EGHLTPARTICLEPAIR
#define DQMOFFLINE_TRIGGER_EGHLTPARTICLEPAIR
 
//a useful struct for defining a pair of particles
 
namespace egHLT {
  template <class T>
  struct ParticlePair {
    const T& part1;
    const T& part2;
 
    ParticlePair(const T& particle1, const T& particle2) : part1(particle1), part2(particle2) {}
    ~ParticlePair() = default;
 
    float mass() const { return (part1.p4() + part2.p4()).mag(); }
  };
}  // namespace egHLT
#endif