#ifndef AliMuonForwardTrackPair_H
#define AliMuonForwardTrackPair_H
#include "AliLog.h"
#include "AliMUONTrackParam.h"
#include "TParticle.h"
#include "AliMuonForwardTrack.h"
#include "TClonesArray.h"
#include "TDatabasePDG.h"
#include "AliMUONTrackExtrap.h"
#include "TLorentzVector.h"
class AliMuonForwardTrackPair : public TObject {
public:
AliMuonForwardTrackPair();
AliMuonForwardTrackPair(AliMuonForwardTrack *track0, AliMuonForwardTrack *track1);
AliMuonForwardTrackPair(const AliMuonForwardTrackPair&);
AliMuonForwardTrackPair &operator=(const AliMuonForwardTrackPair&);
virtual void Clear(const Option_t* ) { fMuonForwardTracks->Delete(); delete fMuonForwardTracks; fMuonForwardTracks = 0x0; }
virtual ~AliMuonForwardTrackPair() { fMuonForwardTracks->Delete(); delete fMuonForwardTracks; }
AliMuonForwardTrack* GetTrack(Int_t iTrack) {
if (iTrack==0 || iTrack==1) return (AliMuonForwardTrack*) fMuonForwardTracks->At(iTrack);
else return NULL;
}
Int_t GetCharge() { return GetTrack(0)->GetCharge() + GetTrack(1)->GetCharge(); }
void SetKinemMC();
void SetKinem(Double_t z, Int_t nClusters=-1);
Bool_t IsKinemSet() { return fIsKinemSet; }
void SetPointOfClosestApproach();
void GetPointOfClosestApproach(Double_t *xyz) {
xyz[0] = fXPointOfClosestApproach;
xyz[1] = fYPointOfClosestApproach;
xyz[2] = fZPointOfClosestApproach;
}
Double_t GetWeightedOffset(Double_t x, Double_t y, Double_t z);
Double_t GetWeightedOffsetAtPCA();
Double_t GetPCAQuality();
Double_t GetMassWithoutMFT(Double_t x, Double_t y, Double_t z, Int_t nClusters=-1);
Double_t GetMassMC() { return fKinemMC.M(); }
Double_t GetRapidityMC() { return fKinemMC.Rapidity(); }
Double_t GetPtMC() { return fKinemMC.Pt(); }
Double_t GetMass() { return fKinem.M(); }
Double_t GetRapidity() { return fKinem.Rapidity(); }
Double_t GetPx() { return fKinem.Px(); }
Double_t GetPy() { return fKinem.Py(); }
Double_t GetPz() { return fKinem.Pz(); }
Double_t GetPt() { return fKinem.Pt(); }
Bool_t IsResonance();
protected:
TClonesArray *fMuonForwardTracks;
TLorentzVector fKinemMC, fKinem;
Bool_t fIsKinemSet;
Double_t fXPointOfClosestApproach, fYPointOfClosestApproach, fZPointOfClosestApproach;
ClassDef(AliMuonForwardTrackPair,1)
};
#endif
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