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//--------------------------------------------------------------------------------------------------
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// $Id: Track.h,v 1.17 2008/09/10 03:33:27 loizides Exp $
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//
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// Track
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//
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// We store the CMSSW track parameterization
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// Parameters associated to the 5D curvilinear covariance matrix:
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// (qoverp, lambda, phi, dxy, dsz)
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// defined as:
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// qoverp = q / abs(p) = signed inverse of momentum [1/GeV]
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// lambda = pi/2 - polar angle at the given point
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// phi = azimuth angle at the given point
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// dxy = -vx*sin(phi) + vy*cos(phi) [cm]
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// dsz = vz*cos(lambda) - (vx*cos(phi)+vy*sin(phi))*sin(lambda) [cm]
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// (See http://cmslxr.fnal.gov/lxr/source/DataFormats/TrackReco/interface/TrackBase.h)
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//
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// Format for fHits: (We do not use anything resembling reco::HitPattern from CMSSW because that
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// data format requires 800 bits per track!)
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// There is a one to one mapping between bits and tracker layers, where layers are enumerated
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// seperately in the PXB, PXF, TIB, TID, TOB, TEC and r-phi and stereo modules are treated as
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// seperate layers in those detectors which have them
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// (TIB L1,L2, TID L1,L2, TOB L1,L2, TEC L1,L2,L5).
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//
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// A bit value of 1 indicates a hit in the corresponding layer, and 0 indicates no hit.
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//
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// Note that currently this only stores information about hits in the Tracker,
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// but muon chamber information will likely be added as well.
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//
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// Bit-Layer assignments (starting from bit 0):
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// Bit 0: PXB L1
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// Bit 1: PXB L2
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// Bit 2: PXB L3
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// Bit 3: PXF L1
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// Bit 4: PXF L2
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// Bit 5: TIB L1 r-phi
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// Bit 6: TIB L1 stereo
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// Bit 7: TIB L2 r-phi
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// Bit 8: TIB L2 stereo
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// Bit 9: TIB L3 r-phi
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// Bit 10: TIB L4 r-phi
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// Bit 11: TID L1 r-phi
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// Bit 12: TID L1 stereo
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// Bit 13: TID L2 r-phi
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// Bit 14: TID L2 stereo
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// Bit 15: TID L3 r-phi
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// Bit 16: TOB L1 r-phi
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// Bit 17: TOB L1 stereo
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// Bit 18: TOB L2 r-phi
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// Bit 19: TOB L2 stereo
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// Bit 20: TOB L3 r-phi
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// Bit 21: TOB L4 r-phi
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// Bit 22: TOB L5 r-phi
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// Bit 23: TOB L6 r-phi
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// Bit 24: TEC L1 r-phi
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// Bit 25: TEC L1 stereo
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// Bit 26: TEC L2 r-phi
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// Bit 27: TEC L2 stereo
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// Bit 28: TEC L3 r-phi
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// Bit 29: TEC L4 r-phi
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// Bit 30: TEC L5 r-phi
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// Bit 31: TEC L5 stereo
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// Bit 32: TEC L6 r-phi
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// Bit 33: TEC L7 r-phi
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// Bit 34: TEC L8 r-phi
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// Bit 35: TEC L9 r-phi
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//
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// Authors: C.Loizides, J.Bendavid, C.Paus
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//--------------------------------------------------------------------------------------------------
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#ifndef MITANA_DATATREE_TRACK_H
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#define MITANA_DATATREE_TRACK_H
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#include "MitAna/DataTree/interface/DataObject.h"
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#include "MitAna/DataTree/interface/MCParticle.h"
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#include "MitAna/DataTree/interface/BitMask.h"
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#include "MitAna/DataTree/interface/Types.h"
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namespace mithep
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{
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class Track : public DataObject
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{
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public:
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enum EHitLayer {
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PXB1,
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PXB2,
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PXB3,
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PXF1,
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PXF2,
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TIB1,
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TIB1S,
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TIB2,
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TIB2S,
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TIB3,
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TIB4,
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TID1,
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TID1S,
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TID2,
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TID2S,
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TID3,
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TOB1,
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TOB1S,
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TOB2,
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TOB2S,
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TOB3,
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TOB4,
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TOB5,
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TOB6,
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TEC1,
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TEC1S,
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TEC2,
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TEC2S,
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TEC3,
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TEC4,
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TEC5,
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TEC5S,
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TEC6,
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TEC7,
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TEC8,
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TEC9
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};
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Track() : fQOverP(0), fQOverPErr(0), fLambda(0), fLambdaErr(0),
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fPhi0(0), fPhi0Err(0), fDxy(0), fDxyErr(0), fDsz(0), fDszErr(0),
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fChi2(0), fNdof(0) {}
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Track(Double_t qOverP, Double_t lambda, Double_t phi0, Double_t dxy, Double_t dsz) :
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fQOverP(qOverP), fQOverPErr(0), fLambda(lambda), fLambdaErr(0),
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fPhi0(phi0), fPhi0Err(0), fDxy(dxy), fDxyErr(0), fDsz(dsz), fDszErr(0),
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fChi2(0), fNdof(0) {}
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~Track() {}
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Int_t Charge() const { return (fQOverP>0) ? 1 : -1; }
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Double_t Chi2() const { return fChi2; }
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void ClearHit(EHitLayer l) { fHits.ClearBit(l); }
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Double_t D0() const { return -fDxy; }
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Double_t D0Err() const { return fDxyErr; }
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Double_t Dsz() const { return fDsz; }
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Double_t DszErr() const { return fDszErr; }
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Double_t Dxy() const { return fDxy; }
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Double_t DxyErr() const { return fDxyErr; }
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Double_t E(Double_t m) const { return TMath::Sqrt(E2(m)); }
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Double_t E2(Double_t m) const { return P2()+m*m; }
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Bool_t Hit(EHitLayer l) const { return fHits.TestBit(l); }
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Double_t Lambda() const { return fLambda; }
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Double_t LambdaErr() const { return fLambdaErr; }
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const MCParticle *MCPart() const;
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ThreeVector Mom() const { return ThreeVector(Px(),Py(),Pz()); }
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FourVector Mom4(Double_t m) const { return FourVector(Px(),Py(),Pz(),E(m)); }
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UInt_t Ndof() const { return fNdof; }
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UInt_t NHits() const { return fHits.NBitsSet(); }
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Double_t P2() const { return P()*P(); }
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Double_t P() const { return TMath::Abs(1./fQOverP); }
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Double_t Phi() const { return fPhi0; }
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Double_t Phi0() const { return fPhi0; }
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Double_t Phi0Err() const { return fPhi0Err; }
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Double_t Pt() const { return TMath::Abs(TMath::Cos(fLambda)/fQOverP); }
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Double_t Px() const { return Pt()*TMath::Cos(fPhi0); }
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Double_t Py() const { return Pt()*TMath::Sin(fPhi0); }
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Double_t Pz() const { return P()*TMath::Sin(fLambda); }
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Double_t QOverP() const { return fQOverP; }
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Double_t QOverPErr() const { return fQOverPErr; }
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Double_t Theta() const { return (TMath::PiOver2() - fLambda); }
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Double_t Z0() const { return fDsz/TMath::Cos(fLambda); }
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void SetChi2(Double_t chi2) { fChi2 = chi2; }
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void SetErrors(Double_t qOverPErr, Double_t lambdaErr, Double_t phi0Err,
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Double_t dXyErr, Double_t dSzErr);
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void SetHelix (Double_t qOverP, Double_t lambda, Double_t phi0,
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Double_t dXy, Double_t dSz);
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void SetHit(EHitLayer l) { fHits.SetBit(l); }
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void SetNdof(UInt_t dof) { fNdof = dof; }
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void SetMCPart(MCParticle *p) { fMCParticleRef = p; }
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protected:
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BitMask64 fHits; //storage for mostly hit information
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Double_t fQOverP; //signed inverse of momentum [1/GeV]
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Double_t fQOverPErr; //error of q/p
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Double_t fLambda; //pi/2 - polar angle at the reference point
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Double_t fLambdaErr; //error of lambda
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Double_t fPhi0; //azimuth angle at the given point
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Double_t fPhi0Err; //error of azimuthal angle
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Double_t fDxy; //transverse distance to reference point [cm]
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Double_t fDxyErr; //error of transverse distance
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Double_t fDsz; //longitudinal distance to reference point [cm]
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Double_t fDszErr; //error of longitudinal distance
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Double_t fChi2; //chi squared of track fit
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UInt_t fNdof; //degree-of-freedom of track fit
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TRef fMCParticleRef; //reference to sim particle (for monte carlo)
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ClassDef(Track, 1) // Track class
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};
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}
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//--------------------------------------------------------------------------------------------------
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inline
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void mithep::Track::SetHelix(Double_t qOverP, Double_t lambda, Double_t phi0,
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Double_t dxy, Double_t dsz)
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{
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// Set helix parameters.
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fQOverP = qOverP;
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fLambda = lambda;
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fPhi0 = phi0;
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fDxy = dxy;
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fDsz = dsz;
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}
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//--------------------------------------------------------------------------------------------------
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inline
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void mithep::Track::SetErrors(Double_t qOverPErr, Double_t lambdaErr, Double_t phi0Err,
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Double_t dxyErr, Double_t dszErr)
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{
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// Set helix errors.
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fQOverPErr = qOverPErr;
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fLambdaErr = lambdaErr;
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fPhi0Err = phi0Err;
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fDxyErr = dxyErr;
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fDszErr = dszErr;
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}
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//--------------------------------------------------------------------------------------------------
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inline
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const mithep::MCParticle *mithep::Track::MCPart() const
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{
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// Get reference to simulated particle.
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return static_cast<const MCParticle*>(fMCParticleRef.GetObject());
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}
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#endif
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