Lepjets_Event_Lep.h

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//
//
// File: hitfit/Lepjets_Event_Lep.h
// Purpose: Represent a `lepton' in a Lepjets_Event class.
// Created: Jul, 2000, sss, based on run 1 mass analysis code.
//
// For each lepton, we store:
//
//   - 4-momentum
//   - type code
//   - Vector_Resolution
//
// CMSSW File      : interface/Lepjets_Event_Lep.h
// Original Author : Scott Stuart Snyder <snyder@bnl.gov> for D0
// Imported to CMSSW by Haryo Sumowidagdo <Suharyo.Sumowidagdo@cern.ch>
//

#ifndef HITFIT_LEPJETS_EVENT_LEP_H
#define HITFIT_LEPJETS_EVENT_LEP_H

#include "TopQuarkAnalysis/TopHitFit/interface/fourvec.h"
#include "TopQuarkAnalysis/TopHitFit/interface/Vector_Resolution.h"
#include <iosfwd>

namespace hitfit {

  enum Lepton_Labels {
    lepton_label = 1,  // generic lepton
    electron_label = 2,
    muon_label = 3
  };

  class Lepjets_Event_Lep
  //
  // Purpose: Represent a `lepton' in a Lepjets_Event class.
  //
  {
  public:
    // Constructor.
    Lepjets_Event_Lep(const Fourvec& p, int type, const Vector_Resolution& res);

    // Access the 4-momentum.
    Fourvec& p();

    const Fourvec& p() const;

    // Access the type code.
    int& type();

    int type() const;

    // Access the resolution.
    const Vector_Resolution& res() const;

    Vector_Resolution& res();

    // Return resolutions for this object.
    double p_sigma() const;

    double eta_sigma() const;

    double phi_sigma() const;

    // Smear this object.
    // If SMEAR_DIR is false, smear the momentum only.
    void smear(CLHEP::HepRandomEngine& engine, bool smear_dir = false);

    // Dump out this object.
    std::ostream& dump(std::ostream& s, bool full = false) const;

    // Sort on pt.
    bool operator<(const Lepjets_Event_Lep& x) const;

  private:
    // The object state.

    Fourvec _p;

    int _type;

    Vector_Resolution _res;
  };

  // Print the object.
  std::ostream& operator<<(std::ostream& s, const Lepjets_Event_Lep& ev);

}  // namespace hitfit

#endif  // not HITFIT_LEPJETS_EVENT_LEP_H