/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/AnalysisDataFormats/EWK/interface/WMuNuCandidate.h

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#ifndef AnalysisDataFormats_EWK_WMuNu_h 
#define AnalysisDataFormats_EWK_WMuNu_h

#include <map>
#include <memory>

#include "DataFormats/MuonReco/interface/Muon.h"
#include "DataFormats/MuonReco/interface/MuonFwd.h"
#include "DataFormats/METReco/interface/MET.h"
#include "DataFormats/METReco/interface/METFwd.h"
#include "DataFormats/Candidate/interface/CompositeCandidate.h"
#include "DataFormats/Candidate/interface/Candidate.h"
#include "DataFormats/RecoCandidate/interface/RecoCandidate.h"
#include "CommonTools/CandUtils/interface/CandCombiner.h"
#include "CommonTools/CandUtils/interface/AddFourMomenta.h"
#include "DataFormats/Candidate/interface/ShallowClonePtrCandidate.h"
namespace reco{

class WMuNuCandidate : public reco::CompositeCandidate {
public:
  WMuNuCandidate();
  WMuNuCandidate(edm::Ptr<reco::Muon>,edm::Ptr<reco::MET>);
  ~WMuNuCandidate();

      //WARNING: W Candidates combine the information from a Muon with the (px,py) information of the MET as the Neutrino
      // --> There is no Pz information!!!!
      // Be very careful when using the default Candidate functions (.mass, .mt, .et, etc). They may not be what you are looking for :-).

      // Example: Candidates have a mt() function which computes the tranverse mass from E & pz.
      // As MET does not have pz information... WMuNuCandidates have an alternative function used in the WMuNu Inclusive Analysis
      // to compute mt just from px, py:
      // Transverse Mass from px, py:
      double massT() const;
      // Transverse Energy from px, py:
      double eT() const;

      // Acoplanarity between the muon and the MET
      double acop() const;

      const reco::Muon & getMuon()     const {return *muon_;}; 
      const reco::MET  & getNeutrino() const {return *neutrino_;};


private:


      edm::Ptr<Muon> muon_;
      edm::Ptr<MET>  neutrino_;  
};


typedef std::vector<reco::WMuNuCandidate> WMuNuCandidateCollection;
}


#endif