3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 //_________________________________________________________________________
7 // Class for PID selection with calorimeters
8 // The Output of the main method GetIdentifiedParticleType is a PDG number identifying the cluster,
9 // being kPhoton, kElectron, kPi0 ... as defined in the header file
10 // - GetIdentifiedParticleType(const TString calo, const TLorentzVector mom, const AliVCluster * cluster)
11 // Assignes a PID tag to the cluster, right now there is the possibility to : use bayesian weights from reco,
12 // recalculate them (EMCAL) or use other procedures not used in reco.
13 // In order to recalculate Bayesian, it is necessary to load the EMCALUtils library
14 // and do SwitchOnBayesianRecalculation().
15 // To change the PID parameters from Low to High like the ones by default, use the constructor
17 // where flux is AliCaloPID::kLow or AliCaloPID::kHigh
18 // If it is necessary to change the parameters use the constructor
19 // AliCaloPID(AliEMCALPIDUtils *utils) and set the parameters before.
21 // - GetGetIdentifiedParticleTypeFromBayesian(const TString calo, const Double_t * pid, const Float_t energy)
22 // Reads the PID weights array of the ESDs and depending on its magnitude identifies the particle,
23 // executed when bayesian is ON by GetIdentifiedParticleType(const TString calo, const TLorentzVector mom, const AliVCluster * cluster)
24 // - SetPIDBits: Simple PID, depending on the thresholds fLOCut fTOFCut and even the
25 // result of the PID bayesian a different PID bit is set.
28 //*-- Author: Gustavo Conesa (INFN-LNF)
30 // --- ROOT system ---
33 class TLorentzVector ;
38 //--- AliRoot system ---
40 class AliAODPWG4Particle;
41 class AliEMCALPIDUtils;
42 class AliCalorimeterUtils;
45 class AliCaloPID : public TObject {
49 AliCaloPID() ; // ctor
50 AliCaloPID(const Int_t particleFlux) ; // ctor, to be used when recalculating bayesian PID
51 AliCaloPID(const TNamed * emcalpid) ; // ctor, to be used when recalculating bayesian PID and need different parameters
52 virtual ~AliCaloPID() ;//virtual dtor
60 kNeutralHadron = 2112,
62 kNeutralUnknown = 130,
66 enum TagType {kPi0Decay, kEtaDecay, kOtherDecay, kConversion, kNoTag = -1};
70 TList * GetCreateOutputObjects();
72 void InitParameters();
74 Int_t GetIdentifiedParticleTypeFromBayesWeights(const TString calo, const Double_t * pid, const Float_t energy) ;
76 Int_t GetIdentifiedParticleType(const TString calo, const TLorentzVector mom, const AliVCluster * cluster) ;
78 TString GetPIDParametersList();
80 Bool_t IsTrackMatched(AliVCluster * cluster, AliCalorimeterUtils* cu, AliVEvent* event) const ;
82 void SetPIDBits(const TString calo, AliVCluster * cluster, AliAODPWG4Particle *aodph,
83 AliCalorimeterUtils* cu, AliVEvent* event);
85 void Print(const Option_t * opt)const;
87 //Check if cluster photon-like. Uses photon cluster parameterization in real pp data
88 //Returns distance in sigmas. Recommended cut 2.5
89 Float_t TestPHOSDispersion(const Double_t pt, const Double_t m20, const Double_t m02) const ;
90 //Checks distance to the closest track. Takes into account
91 //non-perpendicular incidence of tracks.
92 Float_t TestPHOSChargedVeto(const Double_t dx, const Double_t dz, const Double_t ptTrack,
93 const Int_t chargeTrack, const Double_t mf) const ;
97 void SetDebug(Int_t deb) { fDebug = deb ; }
98 Int_t GetDebug() const { return fDebug ; }
100 enum eventType{kLow,kHigh};
101 void SetLowParticleFlux() { fParticleFlux = kLow ; }
102 void SetHighParticleFlux() { fParticleFlux = kHigh ; }
103 // not really used, only for bayesian recalculation in EMCAL, but could be useful in future
107 void SwitchOnBayesian() { fUseBayesianWeights = kTRUE ; }
108 void SwitchOffBayesian() { fUseBayesianWeights = kFALSE; }
109 void SwitchOnBayesianRecalculation() { fRecalculateBayesian = kTRUE ; fUseBayesianWeights = kTRUE ;} // EMCAL
110 void SwitchOffBayesianRecalculation() { fRecalculateBayesian = kFALSE; } // EMCAL
112 AliEMCALPIDUtils * GetEMCALPIDUtils() ;
115 Float_t GetEMCALPhotonWeight() const { return fEMCALPhotonWeight ; }
116 Float_t GetEMCALPi0Weight() const { return fEMCALPi0Weight ; }
117 Float_t GetEMCALElectronWeight() const { return fEMCALElectronWeight ; }
118 Float_t GetEMCALChargeWeight() const { return fEMCALChargeWeight ; }
119 Float_t GetEMCALNeutralWeight() const { return fEMCALNeutralWeight ; }
120 Float_t GetPHOSPhotonWeight() const { return fPHOSPhotonWeight ; }
121 Float_t GetPHOSPi0Weight() const { return fPHOSPi0Weight ; }
122 Float_t GetPHOSElectronWeight() const { return fPHOSElectronWeight ; }
123 Float_t GetPHOSChargeWeight() const { return fPHOSChargeWeight ; }
124 Float_t GetPHOSNeutralWeight() const { return fPHOSNeutralWeight ; }
126 Bool_t IsPHOSPIDWeightFormulaOn() const { return fPHOSWeightFormula ; }
128 TFormula * GetPHOSPhotonWeightFormula() {
129 if(!fPHOSPhotonWeightFormula)
130 fPHOSPhotonWeightFormula = new TFormula("phos_photon_weight",
131 fPHOSPhotonWeightFormulaExpression);
132 return fPHOSPhotonWeightFormula ; }
134 TFormula * GetPHOSPi0WeightFormula() {
135 if(!fPHOSPi0WeightFormula)
136 fPHOSPi0WeightFormula = new TFormula("phos_pi0_weight",
137 fPHOSPi0WeightFormulaExpression);
138 return fPHOSPi0WeightFormula ; }
140 TString GetPHOSPhotonWeightFormulaExpression() const { return fPHOSPhotonWeightFormulaExpression ; }
141 TString GetPHOSPi0WeightFormulaExpression() const { return fPHOSPi0WeightFormulaExpression ; }
144 void SetEMCALPhotonWeight (Float_t w) { fEMCALPhotonWeight = w ; }
145 void SetEMCALPi0Weight (Float_t w) { fEMCALPi0Weight = w ; }
146 void SetEMCALElectronWeight(Float_t w) { fEMCALElectronWeight = w ; }
147 void SetEMCALChargeWeight (Float_t w) { fEMCALChargeWeight = w ; }
148 void SetEMCALNeutralWeight (Float_t w) { fEMCALNeutralWeight = w ; }
149 void SetPHOSPhotonWeight (Float_t w) { fPHOSPhotonWeight = w ; }
150 void SetPHOSPi0Weight (Float_t w) { fPHOSPi0Weight = w ; }
151 void SetPHOSElectronWeight (Float_t w) { fPHOSElectronWeight = w ; }
152 void SetPHOSChargeWeight (Float_t w) { fPHOSChargeWeight = w ; }
153 void SetPHOSNeutralWeight (Float_t w) { fPHOSNeutralWeight = w ; }
155 void UsePHOSPIDWeightFormula (Bool_t ok ) { fPHOSWeightFormula = ok ; }
156 void SetPHOSPhotonWeightFormulaExpression(TString ph) { fPHOSPhotonWeightFormulaExpression = ph ; }
157 void SetPHOSPi0WeightFormulaExpression (TString pi) { fPHOSPi0WeightFormulaExpression = pi ; }
161 void SetEMCALLambda0CutMax(Float_t lcut ) { fEMCALL0CutMax = lcut ; }
162 Float_t GetEMCALLambda0CutMax() const { return fEMCALL0CutMax ; }
164 void SetEMCALLambda0CutMin(Float_t lcut ) { fEMCALL0CutMin = lcut ; }
165 Float_t GetEMCALLambda0CutMin() const { return fEMCALL0CutMin ; }
167 void SetEMCALDEtaCut(Float_t dcut ) { fEMCALDEtaCut = dcut ; }
168 Float_t GetEMCALDEtaCut() const { return fEMCALDEtaCut ; }
170 void SetEMCALDPhiCut(Float_t dcut ) { fEMCALDPhiCut = dcut ; }
171 Float_t GetEMCALDPhiCut() const { return fEMCALDPhiCut ; }
173 void SetTOFCut(Float_t tcut ) { fTOFCut = tcut ; }
174 Float_t GetTOFCut() const { return fTOFCut ; }
176 void SetPHOSRCut(Float_t rcut ) { fPHOSRCut = rcut ; }
177 Float_t GetPHOSRCut() const { return fPHOSRCut ; }
179 void SetPHOSDispersionCut(Float_t dcut ) { fPHOSDispersionCut = dcut ; }
180 Float_t GetPHOSDispersionCut() const { return fPHOSDispersionCut ; }
185 Int_t fDebug; // Debug level
186 Int_t fParticleFlux; // Particle flux for setting PID parameters
189 AliEMCALPIDUtils * fEMCALPIDUtils; // Pointer to EMCALPID to redo the PID Bayesian calculation
190 Bool_t fUseBayesianWeights; // Select clusters based on weights calculated in reconstruction
191 Bool_t fRecalculateBayesian; // Recalculate PID bayesian or use simple PID?
193 Float_t fEMCALPhotonWeight; // Bayesian PID weight for photons in EMCAL
194 Float_t fEMCALPi0Weight; // Bayesian PID weight for pi0 in EMCAL
195 Float_t fEMCALElectronWeight; // Bayesian PID weight for electrons in EMCAL
196 Float_t fEMCALChargeWeight; // Bayesian PID weight for charged hadrons in EMCAL
197 Float_t fEMCALNeutralWeight; // Bayesian PID weight for neutral hadrons in EMCAL
198 Float_t fPHOSPhotonWeight; // Bayesian PID weight for photons in PHOS
199 Float_t fPHOSPi0Weight; // Bayesian PID weight for pi0 in PHOS
200 Float_t fPHOSElectronWeight; // Bayesian PID weight for electrons in PHOS
201 Float_t fPHOSChargeWeight; // Bayesian PID weight for charged hadrons in PHOS
202 Float_t fPHOSNeutralWeight; // Bayesian PID weight for neutral hadrons in PHOS
204 Bool_t fPHOSWeightFormula ; // Use parametrized weight threshold, function of energy
205 TFormula *fPHOSPhotonWeightFormula ; // Formula for photon weight
206 TFormula *fPHOSPi0WeightFormula ; // Formula for pi0 weight
207 TString fPHOSPhotonWeightFormulaExpression; // Photon weight formula in string
208 TString fPHOSPi0WeightFormulaExpression; // Pi0 weight formula in string
211 Float_t fEMCALL0CutMax; // Max Cut on shower shape lambda0, used in PID evaluation, only EMCAL
212 Float_t fEMCALL0CutMin; // Min Cut on shower shape lambda0, used in PID evaluation, only EMCAL
213 Float_t fEMCALDEtaCut; // Track matching cut on Dz
214 Float_t fEMCALDPhiCut; // Track matching cut on Dx
216 Float_t fTOFCut; // Cut on TOF, used in PID evaluation
218 Float_t fPHOSDispersionCut; // Shower shape elipse radious cut
219 Float_t fPHOSRCut; // Track-Cluster distance cut for track matching in PHOS
221 AliCaloPID & operator = (const AliCaloPID & g) ; // cpy assignment
222 AliCaloPID( const AliCaloPID & g) ; // cpy ctor
224 ClassDef(AliCaloPID,11)
228 #endif //ALICALOPID_H