1 #ifndef ALIAODRECODECAY_H
2 #define ALIAODRECODECAY_H
3 /* Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 //***********************************************************
7 // Class AliAODRecoDecay
8 // base class for AOD reconstructed decays
9 // Author: A.Dainese, andrea.dainese@lnl.infn.it
10 //***********************************************************
14 #include <TClonesArray.h>
15 #include "AliAODVertex.h"
16 #include "AliAODTrack.h"
17 #include "AliVTrack.h"
21 class AliAODRecoDecay : public AliVTrack {
26 AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
27 Double_t *px,Double_t *py,Double_t *pz,
29 AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
31 virtual ~AliAODRecoDecay();
33 AliAODRecoDecay(const AliAODRecoDecay& source);
34 AliAODRecoDecay& operator=(const AliAODRecoDecay& source);
38 Double_t GetSecVtxX() const {return GetSecondaryVtx()->GetX();}
39 Double_t GetSecVtxY() const {return GetSecondaryVtx()->GetY();}
40 Double_t GetSecVtxZ() const {return GetSecondaryVtx()->GetZ();}
41 Double_t RadiusSecVtx() const;
42 void SetSecondaryVtx(AliAODVertex *vtx2) {fSecondaryVtx=vtx2;}
43 AliAODVertex* GetSecondaryVtx() const { return (((AliAODVertex*)fSecondaryVtx.GetObject()) ? (AliAODVertex*)fSecondaryVtx.GetObject() : GetOwnSecondaryVtx()); }
44 void SetOwnSecondaryVtx(AliAODVertex *vtx2) {fOwnSecondaryVtx=vtx2;}
45 AliAODVertex* GetOwnSecondaryVtx() const {return fOwnSecondaryVtx;}
46 void GetSecondaryVtx(Double_t vtx[3]) const;
47 Double_t GetReducedChi2() const {return GetSecondaryVtx()->GetChi2perNDF();}
48 Short_t Charge() const {return fCharge;}
49 Short_t GetCharge() const {return fCharge;}
50 void SetCharge(Short_t charge=0) {fCharge=charge;}
52 // Match to MC signal:
53 // check if this candidate is matched to a MC signal
55 // If yes, return label (>=0) of the AliAODMCParticle
56 // if ndgCk>0, checks also daughters PDGs
57 Int_t MatchToMC(Int_t pdgabs,TClonesArray *mcArray,Int_t ndgCk=0,Int_t *pdgDg=0) const;
60 void SetPID(Int_t nprongs,Double_t *pid);
61 Double_t *GetPID() const { return fPID; }
62 void GetPIDProng(Int_t ip,Double_t *pid) const;
63 virtual const Double_t *PID() const { return fPID; }
65 // prong-to-prong DCAs
66 void SetDCAs(Int_t nDCA,Double_t *dca);
67 void SetDCA(Double_t dca); // 2 prong
68 Double_t GetDCA(Int_t i=0) const {return fDCA[i];}
70 //event and run number
71 void SetEventRunNumbers(Int_t en,Int_t rn)
72 { fEventNumber=en; fRunNumber=rn; return; }
73 Int_t GetEventNumber() const { return fEventNumber; }
74 Int_t GetRunNumber() const { return fRunNumber; }
76 // methods of AliVTrack
77 virtual Int_t GetID() const { return -1; }
78 virtual UChar_t GetITSClusterMap() const;
79 virtual ULong_t GetStatus() const;
80 virtual Bool_t GetXYZ(Double_t *p) const { return XvYvZv(p); }
81 virtual Bool_t GetCovarianceXYZPxPyPz(Double_t cv[21]) const;
82 virtual Bool_t PropagateToDCA(const AliVVertex* vtx,Double_t b,Double_t maxd,Double_t dz[2],Double_t covar[3]);
84 // kinematics & topology
88 Double_t P() const {return TMath::Sqrt(Px()*Px()+Py()*Py()+Pz()*Pz());}
89 Double_t Pt() const {return TMath::Sqrt(Px()*Px()+Py()*Py());}
90 Double_t OneOverPt() const {return (Pt() ? 1./Pt() : 0.);}
91 Bool_t PxPyPz(Double_t p[3]) const { p[0] = Px(); p[1] = Py(); p[2] = Pz(); return kTRUE; }
92 Double_t Phi() const {return TMath::Pi()+TMath::ATan2(-Py(),-Px());}
93 Double_t Theta() const {return 0.5*TMath::Pi()-TMath::ATan(Pz()/(Pt()+1.e-13));}
94 Double_t Eta() const {return 0.5*TMath::Log((P()+Pz())/(P()-Pz()+1.e-13));}
95 Double_t Xv() const { return GetSecVtxX(); }
96 Double_t Yv() const { return GetSecVtxY(); }
97 Double_t Zv() const { return GetSecVtxZ(); }
98 virtual Bool_t XvYvZv(Double_t x[3]) const { x[0] = Xv(); x[1] = Yv(); x[2] = Zv(); return kTRUE; }
99 Double_t E(UInt_t pdg) const;
100 Double_t Y(UInt_t pdg) const {return 0.5*TMath::Log((E(pdg)+Pz())/(E(pdg)-Pz()+1.e-13));}
101 Double_t DecayLength(Double_t point[3]) const;
102 Double_t DecayLength(AliAODVertex *vtx1) const
103 {return GetSecondaryVtx()->DistanceToVertex(vtx1);}
104 Double_t DecayLengthError(AliAODVertex *vtx1) const
105 {return GetSecondaryVtx()->ErrorDistanceToVertex(vtx1);}
106 Double_t NormalizedDecayLength(AliAODVertex *vtx1) const
107 {return DecayLength(vtx1)/DecayLengthError(vtx1);}
108 Double_t DecayLengthXY(Double_t point[3]) const;
109 Double_t DecayLengthXY(AliAODVertex *vtx1) const
110 {return GetSecondaryVtx()->DistanceXYToVertex(vtx1);}
111 Double_t DecayLengthXYError(AliAODVertex *vtx1) const
112 {return GetSecondaryVtx()->ErrorDistanceXYToVertex(vtx1);}
113 Double_t NormalizedDecayLengthXY(AliAODVertex *vtx1) const
114 {return DecayLengthXY(vtx1)/DecayLengthXYError(vtx1);}
115 Double_t Ct(UInt_t pdg,Double_t point[3]) const;
116 Double_t Ct(UInt_t pdg,AliAODVertex *vtx1) const;
117 Double_t CosPointingAngle(Double_t point[3]) const;
118 Double_t CosPointingAngle(AliAODVertex *vtx1) const;
119 Double_t CosPointingAngleXY(Double_t point[3]) const;
120 Double_t CosPointingAngleXY(AliAODVertex *vtx1) const;
121 Double_t CosThetaStar(Int_t ip,UInt_t pdgvtx,UInt_t pdgprong0,UInt_t pdgprong1) const;
122 Double_t InvMass(Int_t npdg,UInt_t *pdg) const;
123 Double_t ImpParXY(Double_t point[3]) const;
124 Double_t ImpParXY(AliAODVertex *vtx1) const;
127 Int_t GetNProngs() const {return fNProngs;}
128 Int_t GetNDaughters() const {return GetSecondaryVtx()->GetNDaughters();}
129 TObject *GetDaughter(Int_t i) const {return (GetNDaughters()>i ? GetSecondaryVtx()->GetDaughter(i) : 0x0);}
131 Short_t ChargeProng(Int_t ip) const;
132 Double_t Getd0Prong(Int_t ip) const {return fd0[ip];}
133 Double_t Prodd0d0(Int_t ip1=0,Int_t ip2=0) const {return fd0[ip1]*fd0[ip2];}
134 Double_t PxProng(Int_t ip) const {return fPx[ip];}
135 Double_t PyProng(Int_t ip) const {return fPy[ip];}
136 Double_t PzProng(Int_t ip) const {return fPz[ip];}
137 Double_t PtProng(Int_t ip) const;
138 Double_t PProng(Int_t ip) const;
139 Double_t PhiProng(Int_t ip) const
140 {return TMath::ATan2(PyProng(ip),PxProng(ip));}
141 Double_t ThetaProng(Int_t ip) const
142 {return 0.5*TMath::Pi()-TMath::ATan(PzProng(ip)/(PtProng(ip)+1.e-13));}
143 Double_t EtaProng(Int_t ip) const
144 {return -TMath::Log(TMath::Tan(0.5*ThetaProng(ip)));}
145 Double_t EProng(Int_t ip,UInt_t pdg) const;
146 Double_t YProng(Int_t ip,UInt_t pdg) const
147 {return 0.5*TMath::Log((EProng(ip,pdg)+PzProng(ip))/(EProng(ip,pdg)-PzProng(ip)+1.e-13));}
148 Double_t Alpha() const; // for Armenteros-Podolanski plot (V0's)
149 Double_t QlProng(Int_t ip) const;
150 Double_t QtProng(Int_t ip=0) const; // for Armenteros-Podolanski plot (V0's)
151 Double_t QlProngFlightLine(Int_t ip,Double_t point[3]) const;
152 Double_t QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
153 Double_t QtProngFlightLine(Int_t ip,Double_t point[3]) const;
154 Double_t QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
155 Double_t InvMass2Prongs(Int_t ip1,Int_t ip2,UInt_t pdg1,UInt_t pdg2) const;
156 Double_t ProngsRelAngle(Int_t ip1=0,Int_t ip2=1) const;
158 // relate to other objects
159 //Double_t DistanceToVertex(AliAODVertex *vtx) // distance to a AliAODVertex
160 //Double_t DistanceToTrack(AliAODTrack *trk) // distance to a AliAODTrack
164 void Print(Option_t* option = "") const;
165 //void PrintIndices() const {GetSecondaryVtx()->PrintIndices();}
167 // dummy functions for inheritance from AliVParticle
169 {printf("Dummy function; use AliAODRecoDecay::E(UInt_t pdg) instead"); return (Double_t)-999.;}
171 {printf("Dummy function; use AliAODRecoDecay::Y(UInt_t pdg) instead"); return (Double_t)-999.;}
173 {printf("Dummy function"); return (Double_t)-999.;}
174 Int_t GetLabel() const {return -1;}
175 Int_t PdgCode() const {return 0;}
179 Int_t MatchToMC(Int_t pdgabs,TClonesArray *mcArray,Int_t dgLabels[10],Int_t ndg,Int_t ndgCk=0,Int_t *pdgDg=0) const;
180 Int_t MatchToMC(Int_t pdgabs,TClonesArray *mcArray,Int_t dgLabels[10]) const { return MatchToMC(pdgabs,mcArray,dgLabels,GetNDaughters()); }
182 TRef fSecondaryVtx; // decay vertex
183 AliAODVertex *fOwnSecondaryVtx; // temporary solution (to work outside AliAODEvent)
184 Short_t fCharge; // charge, use this convention for prongs charges:
185 // if(charge== 0) even-index prongs are +
186 // odd-index prongs are -
187 // if(charge==+1) even-index prongs are +
188 // odd-index prongs are -
189 // if(charge==-1) even-index prongs are -
190 // odd-index prongs are +
192 // TEMPORARY, to be removed when we do analysis on AliAODEvent
193 Int_t fNProngs; // number of prongs
194 Int_t fNDCA; // number of dca's
195 Int_t fNPID; // number of PID probabilities
196 Double32_t *fPx; //[fNProngs] px of tracks at the vertex [GeV/c]
197 Double32_t *fPy; //[fNProngs] py of tracks at the vertex [GeV/c]
198 Double32_t *fPz; //[fNProngs] pz of tracks at the vertex [GeV/c]
199 Double32_t *fd0; //[fNProngs] rphi impact params w.r.t. Primary Vtx [cm]
200 Double32_t *fDCA; //[fNDCA] prong-to-prong DCA [cm]
201 // convention:fDCA[0]=p0p1,fDCA[1]=p0p2,fDCA[2]=p1p2,...
202 Double32_t *fPID; //[fNPID] combined pid
203 // (combined detector response probabilities)
205 // TEMPORARY, to be removed when we do analysis on AliAODEvent
208 // TO BE PUT IN SPECIAL MC CLASS
209 //Bool_t fSignal; // TRUE if signal, FALSE if background (for simulation)
210 //Int_t fTrkNum[2]; // numbers of the two decay tracks
211 //Int_t fPdg[2]; // PDG codes of the two tracks (for sim.)
212 //Int_t fMum[2]; // PDG codes of the mothers (for sim.)
216 ClassDef(AliAODRecoDecay,4) // base class for AOD reconstructed decays
220 inline Short_t AliAODRecoDecay::ChargeProng(Int_t ip) const
222 if(fCharge==0 || fCharge==+1) {
228 } else { // fCharge==-1
237 inline Double_t AliAODRecoDecay::RadiusSecVtx() const
239 return TMath::Sqrt(GetSecVtxX()*GetSecVtxX()+GetSecVtxY()*GetSecVtxY());
242 inline void AliAODRecoDecay::GetSecondaryVtx(Double_t vtx[3]) const
244 GetSecondaryVtx()->GetPosition(vtx);
248 inline Double_t AliAODRecoDecay::Px() const
251 for(Int_t i=0;i<GetNProngs();i++) px+=PxProng(i);
255 inline Double_t AliAODRecoDecay::Py() const
258 for(Int_t i=0;i<GetNProngs();i++) py+=PyProng(i);
262 inline Double_t AliAODRecoDecay::Pz() const
265 for(Int_t i=0;i<GetNProngs();i++) pz+=PzProng(i);
269 inline Double_t AliAODRecoDecay::Ct(UInt_t pdg,AliAODVertex *vtx1) const
272 vtx1->GetPosition(v);
276 inline Double_t AliAODRecoDecay::CosPointingAngle(AliAODVertex *vtx1) const
279 vtx1->GetPosition(v);
280 return CosPointingAngle(v);
283 inline Double_t AliAODRecoDecay::CosPointingAngleXY(AliAODVertex *vtx1) const
286 vtx1->GetPosition(v);
287 return CosPointingAngleXY(v);
290 inline Double_t AliAODRecoDecay::ImpParXY(AliAODVertex *vtx1) const
293 vtx1->GetPosition(v);
297 inline Double_t AliAODRecoDecay::PtProng(Int_t ip) const
299 return TMath::Sqrt(PxProng(ip)*PxProng(ip)+PyProng(ip)*PyProng(ip));
302 inline Double_t AliAODRecoDecay::PProng(Int_t ip) const
304 return TMath::Sqrt(PtProng(ip)*PtProng(ip)+PzProng(ip)*PzProng(ip));
307 inline Double_t AliAODRecoDecay::QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
310 vtx1->GetPosition(v);
311 return QlProngFlightLine(ip,v);
314 inline Double_t AliAODRecoDecay::QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
317 vtx1->GetPosition(v);
318 return QtProngFlightLine(ip,v);
321 inline void AliAODRecoDecay::SetDCAs(Int_t nDCA,Double_t *dca)
323 if(nDCA!=(GetNProngs()*(GetNProngs()-1)/2)) {
324 printf("Wrong number of DCAs, must be nProngs*(nProngs-1)/2");
327 if(fDCA) delete [] fDCA;
329 fDCA = new Double32_t[nDCA];
330 for(Int_t i=0;i<nDCA;i++)
335 inline void AliAODRecoDecay::SetDCA(Double_t dca)
337 Double_t ddca[1]; ddca[0]=dca;
342 inline void AliAODRecoDecay::SetPID(Int_t nprongs,Double_t *pid)
344 if(nprongs!=GetNProngs()) {
345 printf("Wrong number of prongs");
348 if(fPID) delete [] fPID;
350 fPID = new Double32_t[nprongs*5];
351 for(Int_t i=0;i<nprongs;i++)
352 for(Int_t j=0;j<5;j++)
353 fPID[i*5+j] = pid[i*5+j];
357 inline void AliAODRecoDecay::GetPIDProng(Int_t ip,Double_t *pid) const
359 for(Int_t j=0;j<5;j++)
360 pid[j] = fPID[ip*5+j];