1 #ifndef ALITPCPIDRESPONSE_H
2 #define ALITPCPIDRESPONSE_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 //-------------------------------------------------------
8 // A very naive design... Should be made better by the detector experts...
9 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10 // With many additions and modifications suggested by
11 // Alexander Kalweit, GSI, alexander.philipp.kalweit@cern.ch
12 // Dariusz Miskowiec, GSI, D.Miskowiec@gsi.de
13 // ...and some modifications by
14 // Mikolaj Krzewicki, GSI, mikolaj.krzewicki@cern.ch
15 // ...and some modifications plus eta correction functions by
16 // Benjamin Hess, University of Tuebingen, bhess@cern.ch
17 //-------------------------------------------------------
22 #include <TObjArray.h>
26 #include "AliVTrack.h"
31 class AliTPCPIDResponse: public TNamed {
34 //TODO Remove? AliTPCPIDResponse(const Double_t *param);
35 AliTPCPIDResponse(const AliTPCPIDResponse&);
36 AliTPCPIDResponse& operator=(const AliTPCPIDResponse&);
37 virtual ~AliTPCPIDResponse();
46 enum ETPCgainScenario {
50 kGainScenarioInvalid = 3
53 static const Int_t fgkNumberOfParticleSpecies=AliPID::kSPECIESC;
54 static const Int_t fgkNumberOfGainScenarios=3;
55 static const Int_t fgkNumberOfdEdxSourceScenarios=3;
58 kdEdxDefault=0, // use combined dEdx from IROC+OROC (assumes ideal detector)
59 kdEdxOROC=1, // use only OROC
60 kdEdxHybrid=2, // Use IROC+OROC dEdx only where IROCS are good (high gain), otherwise fall back to OROC only
61 kdEdxInvalid=3 //invalid
64 void SetSigma(Float_t res0, Float_t resN2);
65 void SetBetheBlochParameters(Double_t kp1,
71 //Better prevent user from setting fMIP != 50. because fMIP set fix to 50 for much other code:
72 void SetMip(Float_t mip) { fMIP = mip; } // Set overall normalisation; mean dE/dx for MIP
73 Double_t Bethe(Double_t bg) const;
74 void SetUseDatabase(Bool_t useDatabase) { fUseDatabase = useDatabase;}
75 Bool_t GetUseDatabase() const { return fUseDatabase;}
77 void SetResponseFunction(AliPID::EParticleType type, TObject * const o) { fResponseFunctions.AddAt(o,(Int_t)type); }
78 const TObject * GetResponseFunction(AliPID::EParticleType type) { return fResponseFunctions.At((Int_t)type); }
79 void SetVoltage(Int_t n, Float_t v) {fVoltageMap[n]=v;}
80 void SetVoltageMap(const TVectorF& a) {fVoltageMap=a;} //resets ownership, ~ will not delete contents
81 Float_t GetVoltage(Int_t n) const {return fVoltageMap[n];}
82 void SetLowGainIROCthreshold(Float_t v) {fLowGainIROCthreshold=v;}
83 void SetBadIROCthreshold(Float_t v) {fBadIROCthreshhold=v;}
84 void SetLowGainOROCthreshold(Float_t v) {fLowGainOROCthreshold=v;}
85 void SetBadOROCthreshold(Float_t v) {fBadOROCthreshhold=v;}
86 void SetMaxBadLengthFraction(Float_t f) {fMaxBadLengthFraction=f;}
88 void SetMagField(Double_t mf) { fMagField=mf; }
90 const TH2D* GetEtaCorrMap() const { return fhEtaCorr; };
91 Bool_t SetEtaCorrMap(TH2D* hMap);
93 Double_t GetTrackTanTheta(const AliVTrack *track) const;
95 Double_t GetEtaCorrection(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
97 Double_t GetEtaCorrectedTrackdEdx(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
99 const TH2D* GetSigmaPar1Map() const { return fhEtaSigmaPar1; };
100 Double_t GetSigmaPar0() const { return fSigmaPar0; };
101 Bool_t SetSigmaParams(TH2D* hSigmaPar1Map, Double_t sigmaPar0);
103 Double_t GetSigmaPar1(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
106 const TF1* GetMultiplicityCorrectionFunction() const { return fCorrFuncMultiplicity; };
107 void SetParameterMultiplicityCorrection(Int_t parIndex, Double_t parValue)
108 { if (fCorrFuncMultiplicity) fCorrFuncMultiplicity->SetParameter(parIndex, parValue); };
110 const TF1* GetMultiplicityCorrectionFunctionTanTheta() const { return fCorrFuncMultiplicityTanTheta; };
111 void SetParameterMultiplicityCorrectionTanTheta(Int_t parIndex, Double_t parValue)
112 { if (fCorrFuncMultiplicityTanTheta) fCorrFuncMultiplicityTanTheta->SetParameter(parIndex, parValue); };
114 const TF1* GetMultiplicitySigmaCorrectionFunction() const { return fCorrFuncSigmaMultiplicity; };
115 void SetParameterMultiplicitySigmaCorrection(Int_t parIndex, Double_t parValue)
116 { if (fCorrFuncSigmaMultiplicity) fCorrFuncSigmaMultiplicity->SetParameter(parIndex, parValue); };
118 void ResetMultiplicityCorrectionFunctions();
120 void SetCurrentEventMultiplicity(Int_t value) { fCurrentEventMultiplicity = value; };
121 Int_t GetCurrentEventMultiplicity() const { return fCurrentEventMultiplicity; };
123 Double_t GetMultiplicityCorrection(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource) const;
125 Double_t GetMultiplicitySigmaCorrection(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource) const;
127 Double_t GetMultiplicityCorrectedTrackdEdx(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
129 Double_t GetEtaAndMultiplicityCorrectedTrackdEdx(const AliVTrack *track, AliPID::EParticleType species,
130 ETPCdEdxSource dedxSource = kdEdxDefault) const;
132 void SetSigma(Float_t res0, Float_t resN2, ETPCgainScenario gainScenario );
133 Double_t GetExpectedSignal( const AliVTrack* track,
134 AliPID::EParticleType species,
135 ETPCdEdxSource dedxSource = kdEdxDefault,
136 Bool_t correctEta = kFALSE,
137 Bool_t correctMultiplicity = kFALSE) const;
138 Double_t GetExpectedSigma( const AliVTrack* track,
139 AliPID::EParticleType species,
140 ETPCdEdxSource dedxSource = kdEdxDefault,
141 Bool_t correctEta = kFALSE,
142 Bool_t correctMultiplicity = kFALSE) const;
143 Float_t GetNumberOfSigmas( const AliVTrack* track,
144 AliPID::EParticleType species,
145 ETPCdEdxSource dedxSource = kdEdxDefault,
146 Bool_t correctEta = kFALSE,
147 Bool_t correctMultiplicity = kFALSE) const;
149 Float_t GetSignalDelta( const AliVTrack* track,
150 AliPID::EParticleType species,
151 ETPCdEdxSource dedxSource = kdEdxDefault,
152 Bool_t correctEta = kFALSE,
153 Bool_t correctMultiplicity = kFALSE,
154 Bool_t ratio = kFALSE) const;
156 void SetResponseFunction(TObject* o,
157 AliPID::EParticleType type,
158 ETPCgainScenario gainScenario);
159 void Print(Option_t* option="") const;
160 TSpline3* GetResponseFunction( AliPID::EParticleType species,
161 ETPCgainScenario gainScenario ) const;
162 TSpline3* GetResponseFunction( const AliVTrack* track,
163 AliPID::EParticleType species,
164 ETPCdEdxSource dedxSource = kdEdxDefault) const;
165 Bool_t ResponseFunctiondEdxN(const AliVTrack* track,
166 AliPID::EParticleType species,
167 ETPCdEdxSource dedxSource,
168 Double_t& dEdx, Int_t& nPoints, ETPCgainScenario& gainScenario, TSpline3** responseFunction) const;
169 Bool_t sectorNumbersInOut(Double_t* trackPositionInner,
170 Double_t* trackPositionOuter,
171 Float_t& phiIn, Float_t& phiOut,
172 Int_t& in, Int_t& out ) const;
173 AliTPCPIDResponse::EChamberStatus TrackStatus(const AliVTrack* track, Int_t layer) const;
174 Float_t MaxClusterRadius(const AliVTrack* track) const;
175 Bool_t TrackApex(const AliVTrack* track, Float_t magField, Double_t position[3]) const;
176 static const char* GainScenarioName(Int_t n) {return fgkGainScenarioName[(n>fgkNumberOfdEdxSourceScenarios)?fgkNumberOfdEdxSourceScenarios+1:n];}
177 Int_t ResponseFunctionIndex( AliPID::EParticleType species,
178 ETPCgainScenario gainScenario ) const;
182 Double_t GetExpectedSignal(const Float_t mom,
183 AliPID::EParticleType n=AliPID::kKaon) const;
184 Double_t GetExpectedSigma(const Float_t mom, const Int_t nPoints,
185 AliPID::EParticleType n=AliPID::kKaon) const;
186 Float_t GetNumberOfSigmas(const Float_t mom,
189 AliPID::EParticleType n=AliPID::kKaon) const {
191 // Deprecated function (for backward compatibility). Please use
192 // GetNumberOfSigmas(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource,
193 // Bool_t correctEta, Bool_t correctMultiplicity)
197 Double_t bethe=GetExpectedSignal(mom,n);
198 Double_t sigma=GetExpectedSigma(mom,nPoints,n);
199 return (dEdx-bethe)/sigma;
202 Double_t GetMIP() const { return fMIP;}
203 Float_t GetRes0() const { return fRes0[0]; }
204 Float_t GetResN2() const { return fResN2[0]; }
205 Float_t GetRes0(ETPCgainScenario s) const { return fRes0[s]; }
206 Float_t GetResN2(ETPCgainScenario s) const { return fResN2[s]; }
208 Bool_t RegisterSpline(const char * name, Int_t index);
209 Double_t EvaldEdxSpline(Double_t bg,Int_t entry);
210 static Double_t SEvaldEdx(Double_t bg,Int_t entry){ return (fgInstance!=0)? fgInstance->EvaldEdxSpline(bg,entry):0;};
213 Double_t GetExpectedSignal(const AliVTrack* track,
214 AliPID::EParticleType species,
216 const TSpline3* responseFunction,
218 Bool_t correctMultiplicity) const;
220 Double_t GetExpectedSigma(const AliVTrack* track,
221 AliPID::EParticleType species,
222 ETPCgainScenario gainScenario,
225 const TSpline3* responseFunction,
227 Bool_t correctMultiplicity) const;
229 Double_t GetEtaCorrection(const AliVTrack *track, Double_t dEdxSplines) const;
231 Double_t GetMultiplicityCorrection(const AliVTrack *track, const Double_t dEdxExpected, const Int_t multiplicity) const;
233 Double_t GetMultiplicitySigmaCorrection(const Double_t dEdxExpected, const Int_t multiplicity) const;
235 Double_t GetSigmaPar1(const AliVTrack *track, AliPID::EParticleType species,
236 Double_t dEdx, const TSpline3* responseFunction) const;
238 // function for numberical debugging 0 registed splines can be used in the TFormula and tree visualizations
241 Float_t fMIP; // dEdx for MIP
242 Float_t fRes0[fgkNumberOfGainScenarios]; // relative dEdx resolution rel sigma = fRes0*sqrt(1+fResN2/npoint)
243 Float_t fResN2[fgkNumberOfGainScenarios]; // relative Npoint dependence rel sigma = fRes0*sqrt(1+fResN2/npoint)
245 Double_t fKp1; // Parameters
247 Double_t fKp3; // the ALEPH
248 Double_t fKp4; // Bethe-Bloch
249 Double_t fKp5; // formula
251 Bool_t fUseDatabase; // flag if fine-tuned database-response or simple ALEPH BB should be used
253 TObjArray fResponseFunctions; //! ObjArray of response functions individually for each particle
254 TVectorF fVoltageMap; //!stores a map of voltages wrt nominal for all chambers
255 Float_t fLowGainIROCthreshold; //voltage threshold below which the IROC is considered low gain
256 Float_t fBadIROCthreshhold; //voltage threshold for bad IROCS
257 Float_t fLowGainOROCthreshold; //voltage threshold below which the OROC is considered low gain
258 Float_t fBadOROCthreshhold; //voltage threshold for bad OROCS
259 Float_t fMaxBadLengthFraction; //the maximum allowed fraction of track length in a bad sector.
261 Int_t sectorNumber(Double_t phi) const;
263 Double_t fMagField; //! Magnetic field
265 static const char* fgkGainScenarioName[fgkNumberOfGainScenarios+1];
267 TH2D* fhEtaCorr; //! Map for TPC eta correction
268 TH2D* fhEtaSigmaPar1; //! Map for parameter 1 of the dEdx sigma parametrisation
270 Double_t fSigmaPar0; // Parameter 0 of the dEdx sigma parametrisation
272 Int_t fCurrentEventMultiplicity; // Multiplicity of the current event
273 TF1* fCorrFuncMultiplicity; //! Function to correct for the multiplicity dependence of the TPC dEdx
274 TF1* fCorrFuncMultiplicityTanTheta; //! Function to correct the additional tanTheta dependence of the multiplicity dependence of the TPC dEdx
275 TF1* fCorrFuncSigmaMultiplicity; //! Function to correct for the multiplicity dependence of the TPC dEdx resolution
279 static AliTPCPIDResponse* fgInstance; //! Instance of this class (singleton implementation)
280 TObjArray fSplineArray; //array of registered splines
281 ClassDef(AliTPCPIDResponse,6) // TPC PID class