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"
19 class AliAODRecoDecay : public AliVTrack {
24 AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
25 Double_t *px,Double_t *py,Double_t *pz,
27 AliAODRecoDecay(AliAODVertex *vtx2,Int_t nprongs,Short_t charge,
29 virtual ~AliAODRecoDecay();
31 AliAODRecoDecay(const AliAODRecoDecay& source);
32 AliAODRecoDecay& operator=(const AliAODRecoDecay& source);
36 Double_t GetSecVtxX() const {return GetSecondaryVtx()->GetX();}
37 Double_t GetSecVtxY() const {return GetSecondaryVtx()->GetY();}
38 Double_t GetSecVtxZ() const {return GetSecondaryVtx()->GetZ();}
39 Double_t RadiusSecVtx() const;
40 void SetSecondaryVtx(AliAODVertex *vtx2) {fSecondaryVtx=vtx2;}
41 AliAODVertex* GetSecondaryVtx() const { return (((AliAODVertex*)fSecondaryVtx.GetObject()) ? (AliAODVertex*)fSecondaryVtx.GetObject() : GetOwnSecondaryVtx()); }
42 void SetOwnSecondaryVtx(AliAODVertex *vtx2) {fOwnSecondaryVtx=vtx2;}
43 AliAODVertex* GetOwnSecondaryVtx() const {return fOwnSecondaryVtx;}
44 void GetSecondaryVtx(Double_t vtx[3]) const;
45 Double_t GetReducedChi2() const {return GetSecondaryVtx()->GetChi2perNDF();}
46 Short_t Charge() const {return fCharge;}
47 Short_t GetCharge() const {return fCharge;}
48 void SetCharge(Short_t charge=0) {fCharge=charge;}
50 // Match to MC signal:
51 // check if this candidate is matched to a MC signal
53 // If yes, return label (>=0) of the AliAODMCParticle
54 // if ndgCk>0, checks also daughters PDGs
55 Int_t MatchToMC(Int_t pdgabs,TClonesArray *mcArray,Int_t ndgCk=0,Int_t *pdgDg=0) const;
58 void SetPID(Int_t nprongs,Double_t *pid);
59 Double_t *GetPID() const { return fPID; }
60 void GetPIDProng(Int_t ip,Double_t *pid) const;
61 virtual const Double_t *PID() const { return fPID; }
63 // prong-to-prong DCAs
64 void SetDCAs(Int_t nDCA,Double_t *dca);
65 void SetDCA(Double_t dca); // 2 prong
66 Double_t GetDCA(Int_t i=0) const {return fDCA[i];}
68 //event and run number
69 void SetEventRunNumbers(Int_t en,Int_t rn)
70 { fEventNumber=en; fRunNumber=rn; return; }
71 Int_t GetEventNumber() const { return fEventNumber; }
72 Int_t GetRunNumber() const { return fRunNumber; }
74 // methods of AliVTrack
75 virtual Int_t GetID() const { return -1; }
76 virtual UChar_t GetITSClusterMap() const;
77 virtual ULong_t GetStatus() const;
78 virtual Bool_t GetXYZ(Double_t *p) const { return XvYvZv(p); }
79 virtual Bool_t GetCovarianceXYZPxPyPz(Double_t cv[21]) const;
81 // kinematics & topology
85 Double_t P() const {return TMath::Sqrt(Px()*Px()+Py()*Py()+Pz()*Pz());}
86 Double_t Pt() const {return TMath::Sqrt(Px()*Px()+Py()*Py());}
87 Double_t OneOverPt() const {return (Pt() ? 1./Pt() : 0.);}
88 Bool_t PxPyPz(Double_t p[3]) const { p[0] = Px(); p[1] = Py(); p[2] = Pz(); return kTRUE; }
89 Double_t Phi() const {return TMath::Pi()+TMath::ATan2(-Py(),-Px());}
90 Double_t Theta() const {return 0.5*TMath::Pi()-TMath::ATan(Pz()/(Pt()+1.e-13));}
91 Double_t Eta() const {return 0.5*TMath::Log((P()+Pz())/(P()-Pz()+1.e-13));}
92 Double_t Xv() const { return GetSecVtxX(); }
93 Double_t Yv() const { return GetSecVtxY(); }
94 Double_t Zv() const { return GetSecVtxZ(); }
95 virtual Bool_t XvYvZv(Double_t x[3]) const { x[0] = Xv(); x[1] = Yv(); x[2] = Zv(); return kTRUE; }
96 Double_t E(UInt_t pdg) const;
97 Double_t Y(UInt_t pdg) const {return 0.5*TMath::Log((E(pdg)+Pz())/(E(pdg)-Pz()+1.e-13));}
98 Double_t DecayLength(Double_t point[3]) const;
99 Double_t DecayLength(AliAODVertex *vtx1) const
100 {return GetSecondaryVtx()->DistanceToVertex(vtx1);}
101 Double_t DecayLengthError(AliAODVertex *vtx1) const
102 {return GetSecondaryVtx()->ErrorDistanceToVertex(vtx1);}
103 Double_t NormalizedDecayLength(AliAODVertex *vtx1) const
104 {return DecayLength(vtx1)/DecayLengthError(vtx1);}
105 Double_t DecayLengthXY(Double_t point[3]) const;
106 Double_t DecayLengthXY(AliAODVertex *vtx1) const
107 {return GetSecondaryVtx()->DistanceXYToVertex(vtx1);}
108 Double_t DecayLengthXYError(AliAODVertex *vtx1) const
109 {return GetSecondaryVtx()->ErrorDistanceXYToVertex(vtx1);}
110 Double_t NormalizedDecayLengthXY(AliAODVertex *vtx1) const
111 {return DecayLengthXY(vtx1)/DecayLengthXYError(vtx1);}
112 Double_t Ct(UInt_t pdg,Double_t point[3]) const;
113 Double_t Ct(UInt_t pdg,AliAODVertex *vtx1) const;
114 Double_t CosPointingAngle(Double_t point[3]) const;
115 Double_t CosPointingAngle(AliAODVertex *vtx1) const;
116 Double_t CosPointingAngleXY(Double_t point[3]) const;
117 Double_t CosPointingAngleXY(AliAODVertex *vtx1) const;
118 Double_t CosThetaStar(Int_t ip,UInt_t pdgvtx,UInt_t pdgprong0,UInt_t pdgprong1) const;
119 Double_t InvMass(Int_t npdg,UInt_t *pdg) const;
120 Double_t ImpParXY(Double_t point[3]) const;
121 Double_t ImpParXY(AliAODVertex *vtx1) const;
124 Int_t GetNProngs() const {return fNProngs;}
125 Int_t GetNDaughters() const {return GetSecondaryVtx()->GetNDaughters();}
126 TObject *GetDaughter(Int_t i) const {return (GetNDaughters()>i ? GetSecondaryVtx()->GetDaughter(i) : 0x0);}
128 Short_t ChargeProng(Int_t ip) const;
129 Double_t Getd0Prong(Int_t ip) const {return fd0[ip];}
130 Double_t Prodd0d0(Int_t ip1=0,Int_t ip2=0) const {return fd0[ip1]*fd0[ip2];}
131 Double_t PxProng(Int_t ip) const {return fPx[ip];}
132 Double_t PyProng(Int_t ip) const {return fPy[ip];}
133 Double_t PzProng(Int_t ip) const {return fPz[ip];}
134 Double_t PtProng(Int_t ip) const;
135 Double_t PProng(Int_t ip) const;
136 Double_t PhiProng(Int_t ip) const
137 {return TMath::ATan2(PyProng(ip),PxProng(ip));}
138 Double_t ThetaProng(Int_t ip) const
139 {return 0.5*TMath::Pi()-TMath::ATan(PzProng(ip)/(PtProng(ip)+1.e-13));}
140 Double_t EtaProng(Int_t ip) const
141 {return -TMath::Log(TMath::Tan(0.5*ThetaProng(ip)));}
142 Double_t EProng(Int_t ip,UInt_t pdg) const;
143 Double_t YProng(Int_t ip,UInt_t pdg) const
144 {return 0.5*TMath::Log((EProng(ip,pdg)+PzProng(ip))/(EProng(ip,pdg)-PzProng(ip)+1.e-13));}
145 Double_t Alpha() const; // for Armenteros-Podolanski plot (V0's)
146 Double_t QlProng(Int_t ip) const;
147 Double_t QtProng(Int_t ip=0) const; // for Armenteros-Podolanski plot (V0's)
148 Double_t QlProngFlightLine(Int_t ip,Double_t point[3]) const;
149 Double_t QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
150 Double_t QtProngFlightLine(Int_t ip,Double_t point[3]) const;
151 Double_t QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const;
152 Double_t InvMass2Prongs(Int_t ip1,Int_t ip2,UInt_t pdg1,UInt_t pdg2) const;
153 Double_t ProngsRelAngle(Int_t ip1=0,Int_t ip2=1) const;
155 // relate to other objects
156 //Double_t DistanceToVertex(AliAODVertex *vtx) // distance to a AliAODVertex
157 //Double_t DistanceToTrack(AliAODTrack *trk) // distance to a AliAODTrack
161 void Print(Option_t* option = "") const;
162 //void PrintIndices() const {GetSecondaryVtx()->PrintIndices();}
164 // dummy functions for inheritance from AliVParticle
166 {printf("Dummy function; use AliAODRecoDecay::E(UInt_t pdg) instead"); return (Double_t)-999.;}
168 {printf("Dummy function; use AliAODRecoDecay::Y(UInt_t pdg) instead"); return (Double_t)-999.;}
170 {printf("Dummy function"); return (Double_t)-999.;}
171 Int_t GetLabel() const {return -1;}
172 Int_t PdgCode() const {return 0;}
175 Int_t MatchToMC(Int_t pdgabs,TClonesArray *mcArray,Int_t dgLabels[10],Int_t ndg,Int_t ndgCk=0,Int_t *pdgDg=0) const;
176 Int_t MatchToMC(Int_t pdgabs,TClonesArray *mcArray,Int_t dgLabels[10]) const { return MatchToMC(pdgabs,mcArray,dgLabels,GetNDaughters()); }
178 TRef fSecondaryVtx; // decay vertex
179 AliAODVertex *fOwnSecondaryVtx; // temporary solution (to work outside AliAODEvent)
180 Short_t fCharge; // charge, use this convention for prongs charges:
181 // if(charge== 0) even-index prongs are +
182 // odd-index prongs are -
183 // if(charge==+1) even-index prongs are +
184 // odd-index prongs are -
185 // if(charge==-1) even-index prongs are -
186 // odd-index prongs are +
188 // TEMPORARY, to be removed when we do analysis on AliAODEvent
189 Int_t fNProngs; // number of prongs
190 Int_t fNDCA; // number of dca's
191 Int_t fNPID; // number of PID probabilities
192 Double32_t *fPx; //[fNProngs] px of tracks at the vertex [GeV/c]
193 Double32_t *fPy; //[fNProngs] py of tracks at the vertex [GeV/c]
194 Double32_t *fPz; //[fNProngs] pz of tracks at the vertex [GeV/c]
195 Double32_t *fd0; //[fNProngs] rphi impact params w.r.t. Primary Vtx [cm]
196 Double32_t *fDCA; //[fNDCA] prong-to-prong DCA [cm]
197 // convention:fDCA[0]=p0p1,fDCA[1]=p0p2,fDCA[2]=p1p2,...
198 Double32_t *fPID; //[fNPID] combined pid
199 // (combined detector response probabilities)
201 // TEMPORARY, to be removed when we do analysis on AliAODEvent
204 // TO BE PUT IN SPECIAL MC CLASS
205 //Bool_t fSignal; // TRUE if signal, FALSE if background (for simulation)
206 //Int_t fTrkNum[2]; // numbers of the two decay tracks
207 //Int_t fPdg[2]; // PDG codes of the two tracks (for sim.)
208 //Int_t fMum[2]; // PDG codes of the mothers (for sim.)
212 ClassDef(AliAODRecoDecay,4) // base class for AOD reconstructed decays
216 inline Short_t AliAODRecoDecay::ChargeProng(Int_t ip) const
218 if(fCharge==0 || fCharge==+1) {
224 } else { // fCharge==-1
233 inline Double_t AliAODRecoDecay::RadiusSecVtx() const
235 return TMath::Sqrt(GetSecVtxX()*GetSecVtxX()+GetSecVtxY()*GetSecVtxY());
238 inline void AliAODRecoDecay::GetSecondaryVtx(Double_t vtx[3]) const
240 GetSecondaryVtx()->GetPosition(vtx);
244 inline Double_t AliAODRecoDecay::Px() const
247 for(Int_t i=0;i<GetNProngs();i++) px+=PxProng(i);
251 inline Double_t AliAODRecoDecay::Py() const
254 for(Int_t i=0;i<GetNProngs();i++) py+=PyProng(i);
258 inline Double_t AliAODRecoDecay::Pz() const
261 for(Int_t i=0;i<GetNProngs();i++) pz+=PzProng(i);
265 inline Double_t AliAODRecoDecay::Ct(UInt_t pdg,AliAODVertex *vtx1) const
268 vtx1->GetPosition(v);
272 inline Double_t AliAODRecoDecay::CosPointingAngle(AliAODVertex *vtx1) const
275 vtx1->GetPosition(v);
276 return CosPointingAngle(v);
279 inline Double_t AliAODRecoDecay::CosPointingAngleXY(AliAODVertex *vtx1) const
282 vtx1->GetPosition(v);
283 return CosPointingAngleXY(v);
286 inline Double_t AliAODRecoDecay::ImpParXY(AliAODVertex *vtx1) const
289 vtx1->GetPosition(v);
293 inline Double_t AliAODRecoDecay::PtProng(Int_t ip) const
295 return TMath::Sqrt(PxProng(ip)*PxProng(ip)+PyProng(ip)*PyProng(ip));
298 inline Double_t AliAODRecoDecay::PProng(Int_t ip) const
300 return TMath::Sqrt(PtProng(ip)*PtProng(ip)+PzProng(ip)*PzProng(ip));
303 inline Double_t AliAODRecoDecay::QlProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
306 vtx1->GetPosition(v);
307 return QlProngFlightLine(ip,v);
310 inline Double_t AliAODRecoDecay::QtProngFlightLine(Int_t ip,AliAODVertex *vtx1) const
313 vtx1->GetPosition(v);
314 return QtProngFlightLine(ip,v);
317 inline void AliAODRecoDecay::SetDCAs(Int_t nDCA,Double_t *dca)
319 if(nDCA!=(GetNProngs()*(GetNProngs()-1)/2)) {
320 printf("Wrong number of DCAs, must be nProngs*(nProngs-1)/2");
323 if(fDCA) delete [] fDCA;
325 fDCA = new Double32_t[nDCA];
326 for(Int_t i=0;i<nDCA;i++)
331 inline void AliAODRecoDecay::SetDCA(Double_t dca)
333 Double_t ddca[1]; ddca[0]=dca;
338 inline void AliAODRecoDecay::SetPID(Int_t nprongs,Double_t *pid)
340 if(nprongs!=GetNProngs()) {
341 printf("Wrong number of prongs");
344 if(fPID) delete [] fPID;
346 fPID = new Double32_t[nprongs*5];
347 for(Int_t i=0;i<nprongs;i++)
348 for(Int_t j=0;j<5;j++)
349 fPID[i*5+j] = pid[i*5+j];
353 inline void AliAODRecoDecay::GetPIDProng(Int_t ip,Double_t *pid) const
355 for(Int_t j=0;j<5;j++)
356 pid[j] = fPID[ip*5+j];