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7984e5f7 | 1 | // This class calculates the inclusive charged particle density |
2 | // in each for the 5 FMD rings. | |
3 | // | |
4 | #ifndef ALIFMDDENSITYCALCULATOR_H | |
5 | #define ALIFMDDENSITYCALCULATOR_H | |
ffca499d | 6 | /** |
7 | * @file AliFMDDensityCalculator.h | |
8 | * @author Christian Holm Christensen <cholm@dalsgaard.hehi.nbi.dk> | |
9 | * @date Wed Mar 23 14:02:09 2011 | |
10 | * | |
11 | * @brief | |
12 | * | |
13 | * | |
bd6f5206 | 14 | * @ingroup pwglf_forward_aod |
ffca499d | 15 | */ |
7e4038b5 | 16 | #include <TNamed.h> |
17 | #include <TList.h> | |
1174780f | 18 | #include <TArrayI.h> |
7e4038b5 | 19 | #include "AliForwardUtil.h" |
d2638bb7 | 20 | #include "AliFMDMultCuts.h" |
821ffd28 | 21 | #include "AliPoissonCalculator.h" |
7e4038b5 | 22 | class AliESDFMD; |
23 | class TH2D; | |
dd497217 | 24 | class TH1D; |
0bd4b00f | 25 | class TProfile; |
1174780f | 26 | class AliFMDCorrELossFit; |
7e4038b5 | 27 | |
28 | /** | |
29 | * This class calculates the inclusive charged particle density | |
30 | * in each for the 5 FMD rings. | |
31 | * | |
32 | * @par Input: | |
33 | * - AliESDFMD object possibly corrected for sharing | |
34 | * | |
35 | * @par Output: | |
36 | * - 5 RingHistos objects - each with a number of vertex dependent | |
37 | * 2D histograms of the inclusive charge particle density | |
38 | * | |
39 | * @par Corrections used: | |
40 | * - AliFMDAnaCalibEnergyDistribution | |
41 | * - AliFMDDoubleHitCorrection | |
42 | * - AliFMDDeadCorrection | |
43 | * | |
bd6f5206 | 44 | * @ingroup pwglf_forward_algo |
45 | * @ingroup pwglf_forward_aod | |
7e4038b5 | 46 | */ |
47 | class AliFMDDensityCalculator : public TNamed | |
48 | { | |
49 | public: | |
56236b95 | 50 | /** |
51 | * How to correct for the missing phi coverage at the corners of the | |
52 | * sensors | |
53 | * | |
54 | */ | |
55 | enum { | |
56 | /** No correction */ | |
57 | kPhiNoCorrect, | |
58 | /** Correct the calculated number charged particles */ | |
59 | kPhiCorrectNch, | |
60 | /** Correct the energy loss */ | |
61 | kPhiCorrectELoss | |
62 | }; | |
7e4038b5 | 63 | /** |
64 | * Constructor | |
65 | */ | |
66 | AliFMDDensityCalculator(); | |
67 | /** | |
68 | * Constructor | |
69 | * | |
70 | * @param name Name of object | |
71 | */ | |
72 | AliFMDDensityCalculator(const char* name); | |
73 | /** | |
74 | * Copy constructor | |
75 | * | |
76 | * @param o Object to copy from | |
77 | */ | |
78 | AliFMDDensityCalculator(const AliFMDDensityCalculator& o); | |
79 | /** | |
80 | * Destructor | |
81 | */ | |
82 | virtual ~AliFMDDensityCalculator(); | |
83 | /** | |
84 | * Assignement operator | |
85 | * | |
86 | * @param o Object to assign from | |
87 | * | |
88 | * @return Reference to this object | |
89 | */ | |
7c1a1f1d | 90 | AliFMDDensityCalculator& operator=(const AliFMDDensityCalculator& o); |
1174780f | 91 | /** |
92 | * Initialize this sub-algorithm | |
93 | * | |
94 | * @param etaAxis Not used | |
95 | */ | |
96 | virtual void Init(const TAxis& etaAxis); | |
7e4038b5 | 97 | /** |
98 | * Do the calculations | |
99 | * | |
100 | * @param fmd AliESDFMD object (possibly) corrected for sharing | |
101 | * @param hists Histogram cache | |
102 | * @param vtxBin Vertex bin | |
103 | * @param lowFlux Low flux flag. | |
104 | * | |
105 | * @return true on successs | |
106 | */ | |
107 | virtual Bool_t Calculate(const AliESDFMD& fmd, | |
108 | AliForwardUtil::Histos& hists, | |
21d778b1 | 109 | UShort_t vtxBin, Bool_t lowFlux, Double_t cent=-1); |
7e4038b5 | 110 | /** |
111 | * Scale the histograms to the total number of events | |
112 | * | |
c389303e | 113 | * @param dir where to put the output |
7e4038b5 | 114 | * @param nEvents Number of events |
115 | */ | |
fb3430ac | 116 | virtual void ScaleHistograms(const TList* dir, Int_t nEvents); |
7e4038b5 | 117 | /** |
118 | * Output diagnostic histograms to directory | |
119 | * | |
120 | * @param dir List to write in | |
121 | */ | |
8eb443e1 | 122 | virtual void DefineOutput(TList* dir); |
ea3e5d95 | 123 | /** |
124 | * Set the debug level. The higher the value the more output | |
125 | * | |
126 | * @param dbg Debug level | |
127 | */ | |
128 | void SetDebug(Int_t dbg=1) { fDebug = dbg; } | |
0bd4b00f | 129 | /** |
130 | * Maximum particle weight to use | |
131 | * | |
132 | * @param m | |
133 | */ | |
134 | void SetMaxParticles(UShort_t m) { fMaxParticles = m; } | |
9d05ffeb | 135 | /** |
136 | * Set whether to use poisson statistics to estimate the | |
137 | * number of particles that has hit within a region. If this is true, | |
138 | * then the average charge particle density is given by | |
139 | * @f[ | |
ffca499d | 140 | * \lambda = -\log\left(\frac{N_e}{N_t}\right) |
9d05ffeb | 141 | * @f] |
142 | * where $N_e$ is the number of strips within the region that has no | |
143 | * hits over threshold, and $N_t$ is the total number of strips in the | |
144 | * region/ | |
145 | * | |
146 | * @param u Whether to use poisson statistics to estimate the | |
147 | * number of particles that has hit within a region. | |
148 | */ | |
149 | void SetUsePoisson(Bool_t u) { fUsePoisson = u; } | |
5bb5d1f6 | 150 | /** |
151 | * Set whether to use the phi acceptance correction. | |
152 | * | |
0082a8fc | 153 | * How the phi acceptance is used depends on the value passed. |
154 | * - 0: No phi acceptance | |
155 | * - 1: Phi acceptance correction done to estimate of particles | |
156 | * - 2: Phi acceptance correction done to energy deposited | |
157 | * | |
158 | * @param u If >0, use the phi acceptance (default is false) | |
5bb5d1f6 | 159 | */ |
56236b95 | 160 | void SetUsePhiAcceptance(UShort_t u=kPhiCorrectNch) { fUsePhiAcceptance = u; } |
b6b35c77 | 161 | /** |
162 | * Set the luming factors used in the Poisson method | |
163 | * | |
164 | * @param eta Must be 1 or larger | |
165 | * @param phi Must be 1 or larger | |
166 | */ | |
167 | void SetLumping(Int_t eta, Int_t phi) { | |
168 | fEtaLumping = (eta < 1 ? 1 : eta); | |
169 | fPhiLumping = (phi < 1 ? 1 : phi); | |
170 | } | |
5bb5d1f6 | 171 | /** |
172 | * Get the multiplicity cut. If the user has set fMultCut (via | |
173 | * SetMultCut) then that value is used. If not, then the lower | |
174 | * value of the fit range for the enery loss fits is returned. | |
175 | * | |
176 | * @return Lower cut on multiplicity | |
177 | */ | |
178 | Double_t GetMultCut(UShort_t d, Char_t r, Double_t eta, | |
179 | Bool_t errors=true) const; | |
0bd4b00f | 180 | /** |
181 | * Get the multiplicity cut. If the user has set fMultCut (via | |
182 | * SetMultCut) then that value is used. If not, then the lower | |
183 | * value of the fit range for the enery loss fits is returned. | |
184 | * | |
185 | * @return Lower cut on multiplicity | |
186 | */ | |
5bb5d1f6 | 187 | Double_t GetMultCut(UShort_t d, Char_t r, Int_t ieta, |
188 | Bool_t errors=true) const; | |
0bd4b00f | 189 | /** |
190 | * Print information | |
191 | * | |
1174780f | 192 | * @param option Print options |
193 | * - max Print max weights | |
0bd4b00f | 194 | */ |
195 | void Print(Option_t* option="") const; | |
e18cb8bd | 196 | /** |
197 | * Get the cuts used | |
198 | * | |
199 | * @return Reference to cuts object | |
200 | */ | |
d2638bb7 | 201 | AliFMDMultCuts& GetCuts() { return fCuts; } |
e18cb8bd | 202 | /** |
203 | * Set the cuts to use | |
204 | * | |
205 | * @param c Cuts to use | |
206 | */ | |
d2638bb7 | 207 | void SetCuts(const AliFMDMultCuts& c) { fCuts = c; } |
7e4038b5 | 208 | protected: |
1174780f | 209 | /** |
210 | * Find the max weight to use for FMD<i>dr</i> in eta bin @a iEta | |
211 | * | |
212 | * @param cor Correction | |
213 | * @param d Detector | |
214 | * @param r Ring | |
215 | * @param iEta Eta bin | |
216 | */ | |
fb3430ac | 217 | Int_t FindMaxWeight(const AliFMDCorrELossFit* cor, |
1174780f | 218 | UShort_t d, Char_t r, Int_t iEta) const; |
219 | ||
220 | /** | |
221 | * Find the max weights and cache them | |
222 | * | |
223 | */ | |
224 | void CacheMaxWeights(); | |
225 | /** | |
226 | * Find the (cached) maximum weight for FMD<i>dr</i> in | |
227 | * @f$\eta@f$ bin @a iEta | |
228 | * | |
229 | * @param d Detector | |
230 | * @param r Ring | |
231 | * @param iEta Eta bin | |
232 | * | |
233 | * @return max weight or <= 0 in case of problems | |
234 | */ | |
235 | Int_t GetMaxWeight(UShort_t d, Char_t r, Int_t iEta) const; | |
236 | /** | |
237 | * Find the (cached) maximum weight for FMD<i>dr</i> iat | |
238 | * @f$\eta@f$ | |
239 | * | |
240 | * @param d Detector | |
241 | * @param r Ring | |
242 | * @param eta Eta bin | |
243 | * | |
244 | * @return max weight or <= 0 in case of problems | |
245 | */ | |
246 | Int_t GetMaxWeight(UShort_t d, Char_t r, Float_t eta) const; | |
247 | ||
7e4038b5 | 248 | /** |
249 | * Get the number of particles corresponding to the signal mult | |
250 | * | |
251 | * @param mult Signal | |
252 | * @param d Detector | |
253 | * @param r Ring | |
254 | * @param s Sector | |
255 | * @param t Strip (not used) | |
256 | * @param v Vertex bin | |
257 | * @param eta Pseudo-rapidity | |
258 | * @param lowFlux Low-flux flag | |
259 | * | |
260 | * @return The number of particles | |
261 | */ | |
262 | virtual Float_t NParticles(Float_t mult, | |
263 | UShort_t d, Char_t r, UShort_t s, UShort_t t, | |
0bd4b00f | 264 | UShort_t v, Float_t eta, Bool_t lowFlux) const; |
7e4038b5 | 265 | /** |
266 | * Get the inverse correction factor. This consist of | |
267 | * | |
268 | * - acceptance correction (corners of sensors) | |
269 | * - double hit correction (for low-flux events) | |
270 | * - dead strip correction | |
271 | * | |
272 | * @param d Detector | |
273 | * @param r Ring | |
274 | * @param s Sector | |
275 | * @param t Strip (not used) | |
276 | * @param v Vertex bin | |
277 | * @param eta Pseudo-rapidity | |
278 | * @param lowFlux Low-flux flag | |
279 | * | |
280 | * @return | |
281 | */ | |
282 | virtual Float_t Correction(UShort_t d, Char_t r, UShort_t s, UShort_t t, | |
0bd4b00f | 283 | UShort_t v, Float_t eta, Bool_t lowFlux) const; |
7e4038b5 | 284 | /** |
285 | * Get the acceptance correction for strip @a t in an ring of type @a r | |
286 | * | |
287 | * @param r Ring type ('I' or 'O') | |
288 | * @param t Strip number | |
289 | * | |
290 | * @return Inverse acceptance correction | |
291 | */ | |
292 | virtual Float_t AcceptanceCorrection(Char_t r, UShort_t t) const; | |
0bd4b00f | 293 | /** |
294 | * Generate the acceptance corrections | |
295 | * | |
296 | * @param r Ring to generate for | |
297 | * | |
298 | * @return Newly allocated histogram of acceptance corrections | |
299 | */ | |
300 | virtual TH1D* GenerateAcceptanceCorrection(Char_t r) const; | |
7e4038b5 | 301 | /** |
302 | * Internal data structure to keep track of the histograms | |
303 | */ | |
9d99b0dd | 304 | struct RingHistos : public AliForwardUtil::RingHistos |
7e4038b5 | 305 | { |
306 | /** | |
307 | * Default CTOR | |
308 | */ | |
309 | RingHistos(); | |
310 | /** | |
311 | * Constructor | |
312 | * | |
313 | * @param d detector | |
314 | * @param r ring | |
315 | */ | |
316 | RingHistos(UShort_t d, Char_t r); | |
317 | /** | |
318 | * Copy constructor | |
319 | * | |
320 | * @param o Object to copy from | |
321 | */ | |
322 | RingHistos(const RingHistos& o); | |
323 | /** | |
324 | * Assignment operator | |
325 | * | |
326 | * @param o Object to assign from | |
327 | * | |
328 | * @return Reference to this | |
329 | */ | |
330 | RingHistos& operator=(const RingHistos& o); | |
331 | /** | |
332 | * Destructor | |
333 | */ | |
334 | ~RingHistos(); | |
9d05ffeb | 335 | /** |
336 | * Initialize the object | |
337 | * | |
338 | * @param eAxis | |
339 | */ | |
340 | void Init(const TAxis& eAxis); | |
c389303e | 341 | /** |
342 | * Make output | |
343 | * | |
344 | * @param dir Where to put it | |
345 | */ | |
7e4038b5 | 346 | void Output(TList* dir); |
9d99b0dd | 347 | /** |
348 | * Scale the histograms to the total number of events | |
349 | * | |
c389303e | 350 | * @param dir Where the output is |
9d99b0dd | 351 | * @param nEvents Number of events |
352 | */ | |
353 | void ScaleHistograms(TList* dir, Int_t nEvents); | |
b6b35c77 | 354 | TH2D* fEvsN; // Correlation of Eloss vs uncorrected Nch |
355 | TH2D* fEvsM; // Correlation of Eloss vs corrected Nch | |
356 | TProfile* fEtaVsN; // Average uncorrected Nch vs eta | |
357 | TProfile* fEtaVsM; // Average corrected Nch vs eta | |
358 | TProfile* fCorr; // Average correction vs eta | |
359 | TH2D* fDensity; // Distribution inclusive Nch | |
9d05ffeb | 360 | TH2D* fELossVsPoisson; // Correlation of energy loss vs Poisson N_ch |
821ffd28 | 361 | AliPoissonCalculator fPoisson; // Calculate density using Poisson method |
f7cfc454 | 362 | TH1D* fELoss; // Energy loss as seen by this |
363 | TH1D* fELossUsed; // Energy loss in strips with signal | |
364 | Double_t fMultCut; // If set, use this | |
9fde7142 | 365 | |
e6463868 | 366 | ClassDef(RingHistos,6); |
7e4038b5 | 367 | }; |
368 | /** | |
369 | * Get the ring histogram container | |
370 | * | |
371 | * @param d Detector | |
372 | * @param r Ring | |
373 | * | |
374 | * @return Ring histogram container | |
375 | */ | |
376 | RingHistos* GetRingHistos(UShort_t d, Char_t r) const; | |
ea3e5d95 | 377 | TList fRingHistos; // List of histogram containers |
1174780f | 378 | TH1D* fSumOfWeights; // Histogram |
379 | TH1D* fWeightedSum; // Histogram | |
380 | TH1D* fCorrections; // Histogram | |
0bd4b00f | 381 | UShort_t fMaxParticles; // Maximum particle weight to use |
9d05ffeb | 382 | Bool_t fUsePoisson; // If true, then use poisson statistics |
0082a8fc | 383 | UShort_t fUsePhiAcceptance; // Whether to correct for corners |
0bd4b00f | 384 | TH1D* fAccI; // Acceptance correction for inner rings |
385 | TH1D* fAccO; // Acceptance correction for outer rings | |
1174780f | 386 | TArrayI fFMD1iMax; // Array of max weights |
387 | TArrayI fFMD2iMax; // Array of max weights | |
388 | TArrayI fFMD2oMax; // Array of max weights | |
389 | TArrayI fFMD3iMax; // Array of max weights | |
390 | TArrayI fFMD3oMax; // Array of max weights | |
5bb5d1f6 | 391 | TH2D* fMaxWeights; // Histogram of max weights |
392 | TH2D* fLowCuts; // Histogram of low cuts | |
b6b35c77 | 393 | Int_t fEtaLumping; // How to lump eta bins for Poisson |
394 | Int_t fPhiLumping; // How to lump phi bins for Poisson | |
ea3e5d95 | 395 | Int_t fDebug; // Debug level |
e18cb8bd | 396 | AliFMDMultCuts fCuts; // Cuts |
7e4038b5 | 397 | |
e18cb8bd | 398 | ClassDef(AliFMDDensityCalculator,7); // Calculate Nch density |
7e4038b5 | 399 | }; |
400 | ||
401 | #endif | |
402 | // Local Variables: | |
403 | // mode: C++ | |
404 | // End: | |
405 |