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70e58892 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
98e98c1c | 15 | |
7ca4655f | 16 | /* $Id$ */ |
70e58892 | 17 | |
18 | //--------------------------------------------------------------------- | |
19 | // UA1 Cone Algorithm Jet finder | |
20 | // manages the search for jets | |
21 | // Author: Rafael.Diaz.Valdes@cern.ch | |
22 | // (version in c++) | |
23 | //--------------------------------------------------------------------- | |
24 | ||
7ca4655f | 25 | #include <TArrayF.h> |
26 | #include <TClonesArray.h> | |
70e58892 | 27 | #include <TFile.h> |
28 | #include <TH1F.h> | |
29 | #include <TH2F.h> | |
7ca4655f | 30 | #include <TLorentzVector.h> |
31 | ||
70e58892 | 32 | #include "AliUA1JetFinderV1.h" |
33 | #include "AliUA1JetHeaderV1.h" | |
34 | #include "AliJetReaderHeader.h" | |
35 | #include "AliJetReader.h" | |
36 | #include "AliJet.h" | |
1d27ecd2 | 37 | #include "AliAODJet.h" |
70e58892 | 38 | |
39 | ||
40 | ClassImp(AliUA1JetFinderV1) | |
41 | ||
42 | //////////////////////////////////////////////////////////////////////// | |
43 | ||
98e98c1c | 44 | AliUA1JetFinderV1::AliUA1JetFinderV1() |
1b7d5d7e | 45 | |
98e98c1c | 46 | { |
47 | // Constructor | |
48 | fHeader = 0x0; | |
49 | fLego = 0x0; | |
70e58892 | 50 | } |
51 | ||
52 | //////////////////////////////////////////////////////////////////////// | |
53 | ||
54 | AliUA1JetFinderV1::~AliUA1JetFinderV1() | |
55 | ||
56 | { | |
57 | // destructor | |
58 | } | |
59 | ||
60 | //////////////////////////////////////////////////////////////////////// | |
61 | ||
62 | ||
63 | void AliUA1JetFinderV1::FindJets() | |
64 | ||
65 | { | |
66 | //1) Fill cell map array | |
67 | //2) calculate total energy and fluctuation level | |
68 | //3) Run algorithm | |
69 | // 3.1) look centroides in cell map | |
70 | // 3.2) calculate total energy in cones | |
71 | // 3.3) flag as a possible jet | |
72 | // 3.4) reorder cones by energy | |
73 | //4) subtract backg in accepted jets | |
74 | //5) fill AliJet list | |
75 | ||
76 | // transform input to pt,eta,phi plus lego | |
7d0f353c | 77 | |
78 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; | |
70e58892 | 79 | TClonesArray *lvArray = fReader->GetMomentumArray(); |
80 | Int_t nIn = lvArray->GetEntries(); | |
81 | if (nIn == 0) return; | |
82 | ||
83 | // local arrays for input | |
1d27ecd2 | 84 | Float_t* ptT = new Float_t[nIn]; |
85 | Float_t* etaT = new Float_t[nIn]; | |
86 | Float_t* phiT = new Float_t[nIn]; | |
70e58892 | 87 | Int_t* injet = new Int_t[nIn]; |
88 | ||
89 | //total energy in array | |
90 | Float_t etbgTotal = 0.0; | |
91 | TH1F* hPtTotal = new TH1F("hPt","Pt distribution of all particles ",100,0.0,15.0); | |
92 | ||
93 | // load input vectors and calculate total energy in array | |
94 | for (Int_t i = 0; i < nIn; i++){ | |
95 | TLorentzVector *lv = (TLorentzVector*) lvArray->At(i); | |
96 | ptT[i] = lv->Pt(); | |
97 | etaT[i] = lv->Eta(); | |
98 | phiT[i] = ((lv->Phi() < 0) ? (lv->Phi()) + 2 * TMath::Pi() : lv->Phi()); | |
99 | if (fReader->GetCutFlag(i) != 1) continue; | |
100 | fLego->Fill(etaT[i], phiT[i], ptT[i]); | |
101 | hPtTotal->Fill(ptT[i]); | |
102 | etbgTotal+= ptT[i]; | |
103 | } | |
104 | fJets->SetNinput(nIn); | |
105 | ||
106 | // calculate total energy and fluctuation in map | |
107 | Double_t meanpt = hPtTotal->GetMean(); | |
108 | Double_t ptRMS = hPtTotal->GetRMS(); | |
109 | Double_t npart = hPtTotal->GetEntries(); | |
110 | Double_t dEtTotal = (TMath::Sqrt(npart))*TMath::Sqrt(meanpt * meanpt + ptRMS*ptRMS); | |
111 | ||
112 | // arrays to hold jets | |
113 | Float_t* etaJet = new Float_t[30]; | |
114 | Float_t* phiJet = new Float_t[30]; | |
115 | Float_t* etJet = new Float_t[30]; | |
116 | Float_t* etsigJet = new Float_t[30]; //signal et in jet | |
117 | Float_t* etallJet = new Float_t[30]; // total et in jet (tmp variable) | |
118 | Int_t* ncellsJet = new Int_t[30]; | |
119 | Int_t* multJet = new Int_t[30]; | |
120 | Int_t nJets; // to hold number of jets found by algorithm | |
121 | Int_t nj; // number of jets accepted | |
7d0f353c | 122 | Float_t prec = header->GetPrecBg(); |
70e58892 | 123 | Float_t bgprec = 1; |
124 | while(bgprec > prec){ | |
125 | //reset jet arrays in memory | |
126 | memset(etaJet,0,sizeof(Float_t)*30); | |
127 | memset(phiJet,0,sizeof(Float_t)*30); | |
128 | memset(etJet,0,sizeof(Float_t)*30); | |
129 | memset(etallJet,0,sizeof(Float_t)*30); | |
130 | memset(etsigJet,0,sizeof(Float_t)*30); | |
131 | memset(ncellsJet,0,sizeof(Int_t)*30); | |
132 | memset(multJet,0,sizeof(Int_t)*30); | |
133 | nJets = 0; | |
134 | nj = 0; | |
135 | // reset particles-jet array in memory | |
98e98c1c | 136 | memset(injet,-1,sizeof(Int_t)*nIn); |
70e58892 | 137 | //run cone algorithm finder |
138 | RunAlgoritm(etbgTotal,dEtTotal,nJets,etJet,etaJet,phiJet,etallJet,ncellsJet); | |
139 | //run background subtraction | |
7d0f353c | 140 | if(nJets > header->GetNAcceptJets()) // limited number of accepted jets per event |
141 | nj = header->GetNAcceptJets(); | |
70e58892 | 142 | else |
143 | nj = nJets; | |
144 | //subtract background | |
145 | Float_t etbgTotalN = 0.0; //new background | |
7d0f353c | 146 | if(header->GetBackgMode() == 1) // standar |
70e58892 | 147 | SubtractBackg(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet); |
7d0f353c | 148 | if(header->GetBackgMode() == 2) //cone |
70e58892 | 149 | SubtractBackgCone(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet); |
7d0f353c | 150 | if(header->GetBackgMode() == 3) //ratio |
70e58892 | 151 | SubtractBackgRatio(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet); |
7d0f353c | 152 | if(header->GetBackgMode() == 4) //statistic |
70e58892 | 153 | SubtractBackgStat(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet); |
154 | //calc precision | |
155 | if(etbgTotalN != 0.0) | |
156 | bgprec = (etbgTotal - etbgTotalN)/etbgTotalN; | |
157 | else | |
158 | bgprec = 0; | |
159 | etbgTotal = etbgTotalN; // update with new background estimation | |
160 | } //end while | |
161 | ||
162 | // add jets to list | |
163 | Int_t* idxjets = new Int_t[nj]; | |
164 | Int_t nselectj = 0; | |
76c48857 | 165 | printf("Found %d jets \n", nj); |
166 | ||
70e58892 | 167 | for(Int_t kj=0; kj<nj; kj++){ |
7d0f353c | 168 | if ((etaJet[kj] > (header->GetJetEtaMax())) || |
169 | (etaJet[kj] < (header->GetJetEtaMin())) || | |
170 | (etJet[kj] < header->GetMinJetEt())) continue; // acceptance eta range and etmin | |
70e58892 | 171 | Float_t px, py,pz,en; // convert to 4-vector |
172 | px = etJet[kj] * TMath::Cos(phiJet[kj]); | |
173 | py = etJet[kj] * TMath::Sin(phiJet[kj]); | |
174 | pz = etJet[kj] / TMath::Tan(2.0 * TMath::ATan(TMath::Exp(-etaJet[kj]))); | |
175 | en = TMath::Sqrt(px * px + py * py + pz * pz); | |
176 | fJets->AddJet(px, py, pz, en); | |
1d27ecd2 | 177 | AliAODJet jet(px, py, pz, en); |
178 | jet.Print(""); | |
179 | ||
180 | AddJet(jet); | |
181 | ||
70e58892 | 182 | idxjets[nselectj] = kj; |
183 | nselectj++; | |
70e58892 | 184 | } |
185 | //add signal percentage and total signal in AliJets for analysis tool | |
186 | Float_t* percentage = new Float_t[nselectj]; | |
187 | Int_t* ncells = new Int_t[nselectj]; | |
188 | Int_t* mult = new Int_t[nselectj]; | |
70e58892 | 189 | for(Int_t i = 0; i< nselectj; i++){ |
190 | percentage[i] = etsigJet[idxjets[i]]/etJet[idxjets[i]]; | |
191 | ncells[i] = ncellsJet[idxjets[i]]; | |
192 | mult[i] = multJet[idxjets[i]]; | |
193 | } | |
98e98c1c | 194 | //add particle-injet relationship /// |
195 | for(Int_t bj = 0; bj < nIn; bj++){ | |
196 | if(injet[bj] == -1) continue; //background particle | |
197 | Int_t bflag = 0; | |
198 | for(Int_t ci = 0; ci< nselectj; ci++){ | |
199 | if(injet[bj] == idxjets[ci]){ | |
200 | injet[bj]= ci; | |
201 | bflag++; | |
202 | break; | |
203 | } | |
204 | } | |
205 | if(bflag == 0) injet[bj] = -1; // set as background particle | |
206 | } | |
70e58892 | 207 | fJets->SetNCells(ncells); |
208 | fJets->SetPtFromSignal(percentage); | |
209 | fJets->SetMultiplicities(mult); | |
210 | fJets->SetInJet(injet); | |
211 | fJets->SetEtaIn(etaT); | |
212 | fJets->SetPhiIn(phiT); | |
213 | fJets->SetPtIn(ptT); | |
7d0f353c | 214 | fJets->SetEtAvg(etbgTotal/(4*(header->GetLegoEtaMax())*TMath::Pi())); |
70e58892 | 215 | |
216 | ||
217 | //delete | |
218 | delete ptT; | |
219 | delete etaT; | |
220 | delete phiT; | |
221 | delete injet; | |
222 | delete hPtTotal; | |
223 | delete etaJet; | |
224 | delete phiJet; | |
225 | delete etJet; | |
226 | delete etsigJet; | |
227 | delete etallJet; | |
228 | delete ncellsJet; | |
229 | delete multJet; | |
230 | delete idxjets; | |
231 | delete percentage; | |
232 | delete ncells; | |
233 | delete mult; | |
234 | ||
235 | ||
236 | } | |
237 | ||
238 | //////////////////////////////////////////////////////////////////////// | |
239 | ||
240 | void AliUA1JetFinderV1::RunAlgoritm(Float_t etbgTotal, Double_t dEtTotal, Int_t& nJets, | |
241 | Float_t* etJet,Float_t* etaJet, Float_t* phiJet, | |
242 | Float_t* etallJet, Int_t* ncellsJet) | |
243 | { | |
244 | ||
245 | //dump lego | |
246 | // check enough space! *to be done* | |
7d0f353c | 247 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
70e58892 | 248 | Float_t etCell[60000]; //! Cell Energy |
249 | Float_t etaCell[60000]; //! Cell eta | |
250 | Float_t phiCell[60000]; //! Cell phi | |
251 | Int_t flagCell[60000]; //! Cell flag | |
252 | ||
253 | Int_t nCell = 0; | |
254 | TAxis* xaxis = fLego->GetXaxis(); | |
255 | TAxis* yaxis = fLego->GetYaxis(); | |
256 | Float_t e = 0.0; | |
7d0f353c | 257 | for (Int_t i = 1; i <= header->GetLegoNbinEta(); i++) { |
258 | for (Int_t j = 1; j <= header->GetLegoNbinPhi(); j++) { | |
70e58892 | 259 | e = fLego->GetBinContent(i,j); |
260 | if (e < 0.0) continue; // don't include this cells | |
261 | Float_t eta = xaxis->GetBinCenter(i); | |
262 | Float_t phi = yaxis->GetBinCenter(j); | |
263 | etCell[nCell] = e; | |
264 | etaCell[nCell] = eta; | |
265 | phiCell[nCell] = phi; | |
266 | flagCell[nCell] = 0; //default | |
267 | nCell++; | |
268 | } | |
269 | } | |
270 | ||
271 | // Parameters from header | |
7d0f353c | 272 | Float_t minmove = header->GetMinMove(); |
273 | Float_t maxmove = header->GetMaxMove(); | |
274 | Float_t rc = header->GetRadius(); | |
275 | Float_t etseed = header->GetEtSeed(); | |
276 | //Float_t etmin = header->GetMinJetEt(); | |
70e58892 | 277 | |
278 | ||
279 | ||
280 | // tmp array of jets form algoritm | |
281 | Float_t etaAlgoJet[30]; | |
282 | Float_t phiAlgoJet[30]; | |
283 | Float_t etAlgoJet[30]; | |
284 | Int_t ncellsAlgoJet[30]; | |
285 | ||
286 | //run algorithm// | |
287 | ||
288 | // sort cells by et | |
289 | Int_t * index = new Int_t[nCell]; | |
290 | TMath::Sort(nCell, etCell, index); | |
291 | // variable used in centroide loop | |
292 | Float_t eta = 0.0; | |
293 | Float_t phi = 0.0; | |
294 | Float_t eta0 = 0.0; | |
295 | Float_t phi0 = 0.0; | |
296 | Float_t etab = 0.0; | |
297 | Float_t phib = 0.0; | |
298 | Float_t etas = 0.0; | |
299 | Float_t phis = 0.0; | |
300 | Float_t ets = 0.0; | |
301 | Float_t deta = 0.0; | |
302 | Float_t dphi = 0.0; | |
303 | Float_t dr = 0.0; | |
304 | Float_t etsb = 0.0; | |
305 | Float_t etasb = 0.0; | |
306 | Float_t phisb = 0.0; | |
307 | ||
308 | ||
309 | for(Int_t icell = 0; icell < nCell; icell++){ | |
310 | Int_t jcell = index[icell]; | |
311 | if(etCell[jcell] <= etseed) continue; // if cell energy is low et seed | |
312 | if(flagCell[jcell] != 0) continue; // if cell was used before | |
313 | eta = etaCell[jcell]; | |
314 | phi = phiCell[jcell]; | |
315 | eta0 = eta; | |
316 | phi0 = phi; | |
317 | etab = eta; | |
318 | phib = phi; | |
319 | ets = etCell[jcell]; | |
320 | etas = 0.0; | |
321 | phis = 0.0; | |
322 | etsb = ets; | |
323 | etasb = 0.0; | |
324 | phisb = 0.0; | |
325 | for(Int_t kcell =0; kcell < nCell; kcell++){ | |
326 | Int_t lcell = index[kcell]; | |
327 | if(lcell == jcell) continue; // cell itself | |
328 | if(flagCell[lcell] != 0) continue; // cell used before | |
329 | if(etCell[lcell] > etCell[jcell]) continue; | |
330 | //calculate dr | |
331 | deta = etaCell[lcell] - eta; | |
332 | dphi = phiCell[lcell] - phi; | |
333 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); | |
334 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; | |
335 | dr = TMath::Sqrt(deta * deta + dphi * dphi); | |
336 | if(dr <= rc){ | |
337 | // calculate offset from initiate cell | |
338 | deta = etaCell[lcell] - eta0; | |
339 | dphi = phiCell[lcell] - phi0; | |
340 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); | |
341 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; | |
342 | etas = etas + etCell[lcell]*deta; | |
343 | phis = phis + etCell[lcell]*dphi; | |
344 | ets = ets + etCell[lcell]; | |
345 | //new weighted eta and phi including this cell | |
346 | eta = eta0 + etas/ets; | |
347 | phi = phi0 + phis/ets; | |
348 | // if cone does not move much, just go to next step | |
349 | dr = TMath::Sqrt((eta-etab)*(eta-etab) + (phi-phib)*(phi-phib)); | |
350 | if(dr <= minmove) break; | |
351 | // cone should not move more than max_mov | |
352 | dr = TMath::Sqrt((etas/ets)*(etas/ets) + (phis/ets)*(phis/ets)); | |
353 | if(dr > maxmove){ | |
354 | eta = etab; | |
355 | phi = phib; | |
356 | ets = etsb; | |
357 | etas = etasb; | |
358 | phis = phisb; | |
359 | }else{ // store this loop information | |
360 | etab=eta; | |
361 | phib=phi; | |
362 | etsb = ets; | |
363 | etasb = etas; | |
364 | phisb = phis; | |
365 | } | |
366 | } | |
367 | }//end of cells loop looking centroide | |
368 | ||
369 | //avoid cones overloap (to be implemented in the future) | |
370 | ||
371 | //flag cells in Rc, estimate total energy in cone | |
372 | Float_t etCone = 0.0; | |
373 | Int_t nCellIn = 0; | |
7d0f353c | 374 | rc = header->GetRadius(); |
70e58892 | 375 | for(Int_t ncell =0; ncell < nCell; ncell++){ |
376 | if(flagCell[ncell] != 0) continue; // cell used before | |
377 | //calculate dr | |
378 | deta = etaCell[ncell] - eta; | |
379 | dphi = phiCell[ncell] - phi; | |
380 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); | |
381 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; | |
382 | dr = TMath::Sqrt(deta * deta + dphi * dphi); | |
383 | if(dr <= rc){ // cell in cone | |
384 | flagCell[ncell] = -1; | |
385 | etCone+=etCell[ncell]; | |
386 | nCellIn++; | |
387 | } | |
388 | } | |
389 | ||
390 | // select jets with et > background | |
391 | // estimate max fluctuation of background in cone | |
392 | Double_t ncellin = (Double_t)nCellIn; | |
393 | Double_t ntcell = (Double_t)nCell; | |
394 | Double_t etbmax = (etbgTotal + dEtTotal )*(ncellin/ntcell); | |
395 | // min cone et | |
396 | Double_t etcmin = etCone ; // could be used etCone - etmin !! | |
397 | //desicions !! etbmax < etcmin | |
398 | for(Int_t mcell =0; mcell < nCell; mcell++){ | |
399 | if(flagCell[mcell] == -1){ | |
400 | if(etbmax < etcmin) | |
401 | flagCell[mcell] = 1; //flag cell as used | |
402 | else | |
403 | flagCell[mcell] = 0; // leave it free | |
404 | } | |
405 | } | |
406 | //store tmp jet info !!! | |
98e98c1c | 407 | if(etbmax < etcmin) { |
70e58892 | 408 | etaAlgoJet[nJets] = eta; |
409 | phiAlgoJet[nJets] = phi; | |
410 | etAlgoJet[nJets] = etCone; | |
411 | ncellsAlgoJet[nJets] = nCellIn; | |
412 | nJets++; | |
413 | } | |
414 | ||
415 | } // end of cells loop | |
416 | ||
417 | //reorder jets by et in cone | |
418 | //sort jets by energy | |
419 | Int_t * idx = new Int_t[nJets]; | |
420 | TMath::Sort(nJets, etAlgoJet, idx); | |
421 | for(Int_t p = 0; p < nJets; p++){ | |
422 | etaJet[p] = etaAlgoJet[idx[p]]; | |
423 | phiJet[p] = phiAlgoJet[idx[p]]; | |
424 | etJet[p] = etAlgoJet[idx[p]]; | |
425 | etallJet[p] = etAlgoJet[idx[p]]; | |
426 | ncellsJet[p] = ncellsAlgoJet[idx[p]]; | |
427 | } | |
428 | ||
429 | ||
430 | //delete | |
431 | delete index; | |
432 | delete idx; | |
433 | ||
434 | } | |
435 | //////////////////////////////////////////////////////////////////////// | |
436 | ||
437 | void AliUA1JetFinderV1::SubtractBackg(Int_t& nIn, Int_t&nJ, Float_t&etbgTotalN, | |
438 | Float_t* ptT, Float_t* etaT, Float_t* phiT, | |
439 | Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet, | |
440 | Int_t* multJet, Int_t* injet) | |
441 | { | |
442 | //background subtraction using cone method but without correction in dE/deta distribution | |
443 | ||
444 | //calculate energy inside and outside cones | |
7d0f353c | 445 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
446 | Float_t rc= header->GetRadius(); | |
70e58892 | 447 | Float_t etIn[30]; |
448 | Float_t etOut = 0; | |
449 | for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array | |
98e98c1c | 450 | // if((fReader->GetCutFlag(jpart)) != 1) continue; // pt cut |
70e58892 | 451 | for(Int_t ijet=0; ijet<nJ; ijet++){ |
452 | Float_t deta = etaT[jpart] - etaJet[ijet]; | |
453 | Float_t dphi = phiT[jpart] - phiJet[ijet]; | |
454 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); | |
455 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; | |
456 | Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi); | |
457 | if(dr <= rc){ // particles inside this cone | |
70e58892 | 458 | multJet[ijet]++; |
459 | injet[jpart] = ijet; | |
98e98c1c | 460 | if((fReader->GetCutFlag(jpart)) == 1){ // pt cut |
461 | etIn[ijet] += ptT[jpart]; | |
462 | if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet]+= ptT[jpart]; | |
463 | } | |
70e58892 | 464 | break; |
465 | } | |
466 | }// end jets loop | |
970a3bbc | 467 | if(injet[jpart] == -1 && fReader->GetCutFlag(jpart) == 1) |
98e98c1c | 468 | etOut += ptT[jpart]; // particle outside cones and pt cut |
70e58892 | 469 | } //end particle loop |
470 | ||
471 | //estimate jets and background areas | |
472 | Float_t areaJet[30]; | |
7d0f353c | 473 | Float_t areaOut = 4*(header->GetLegoEtaMax())*TMath::Pi(); |
70e58892 | 474 | for(Int_t k=0; k<nJ; k++){ |
475 | Float_t detamax = etaJet[k] + rc; | |
476 | Float_t detamin = etaJet[k] - rc; | |
477 | Float_t accmax = 0.0; Float_t accmin = 0.0; | |
7d0f353c | 478 | if(detamax > header->GetLegoEtaMax()){ // sector outside etamax |
479 | Float_t h = header->GetLegoEtaMax() - etaJet[k]; | |
70e58892 | 480 | accmax = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h); |
481 | } | |
7d0f353c | 482 | if(detamin < header->GetLegoEtaMin()){ // sector outside etamin |
483 | Float_t h = header->GetLegoEtaMax() + etaJet[k]; | |
70e58892 | 484 | accmin = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h); |
485 | } | |
486 | areaJet[k] = rc*rc*TMath::Pi() - accmax - accmin; | |
487 | areaOut = areaOut - areaJet[k]; | |
488 | } | |
489 | //subtract background using area method | |
490 | for(Int_t ljet=0; ljet<nJ; ljet++){ | |
491 | Float_t areaRatio = areaJet[ljet]/areaOut; | |
492 | etJet[ljet] = etIn[ljet]-etOut*areaRatio; // subtraction | |
493 | } | |
494 | ||
495 | // estimate new total background | |
7d0f353c | 496 | Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi(); |
70e58892 | 497 | etbgTotalN = etOut*areaT/areaOut; |
498 | ||
499 | ||
500 | } | |
501 | ||
502 | //////////////////////////////////////////////////////////////////////// | |
503 | ||
504 | void AliUA1JetFinderV1::SubtractBackgStat(Int_t& nIn, Int_t&nJ,Float_t&etbgTotalN, | |
505 | Float_t* ptT, Float_t* etaT, Float_t* phiT, | |
506 | Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet, | |
507 | Int_t* multJet, Int_t* injet) | |
508 | { | |
509 | ||
510 | //background subtraction using statistical method | |
7d0f353c | 511 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
512 | Float_t etbgStat = header->GetBackgStat(); // pre-calculated background | |
70e58892 | 513 | |
514 | //calculate energy inside | |
7d0f353c | 515 | Float_t rc= header->GetRadius(); |
70e58892 | 516 | Float_t etIn[30]; |
517 | ||
518 | for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array | |
98e98c1c | 519 | //if((fReader->GetCutFlag(jpart)) != 1) continue; // pt cut |
70e58892 | 520 | for(Int_t ijet=0; ijet<nJ; ijet++){ |
521 | Float_t deta = etaT[jpart] - etaJet[ijet]; | |
522 | Float_t dphi = phiT[jpart] - phiJet[ijet]; | |
523 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); | |
524 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; | |
525 | Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi); | |
526 | if(dr <= rc){ // particles inside this cone | |
70e58892 | 527 | multJet[ijet]++; |
528 | injet[jpart] = ijet; | |
98e98c1c | 529 | if((fReader->GetCutFlag(jpart)) == 1){ // pt cut |
530 | etIn[ijet]+= ptT[jpart]; | |
531 | if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart]; | |
532 | } | |
70e58892 | 533 | break; |
534 | } | |
535 | }// end jets loop | |
536 | } //end particle loop | |
537 | ||
538 | //calc jets areas | |
539 | Float_t areaJet[30]; | |
7d0f353c | 540 | Float_t areaOut = 4*(header->GetLegoEtaMax())*TMath::Pi(); |
70e58892 | 541 | for(Int_t k=0; k<nJ; k++){ |
542 | Float_t detamax = etaJet[k] + rc; | |
543 | Float_t detamin = etaJet[k] - rc; | |
544 | Float_t accmax = 0.0; Float_t accmin = 0.0; | |
7d0f353c | 545 | if(detamax > header->GetLegoEtaMax()){ // sector outside etamax |
546 | Float_t h = header->GetLegoEtaMax() - etaJet[k]; | |
70e58892 | 547 | accmax = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h); |
548 | } | |
7d0f353c | 549 | if(detamin < header->GetLegoEtaMin()){ // sector outside etamin |
550 | Float_t h = header->GetLegoEtaMax() + etaJet[k]; | |
70e58892 | 551 | accmin = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h); |
552 | } | |
553 | areaJet[k] = rc*rc*TMath::Pi() - accmax - accmin; | |
554 | } | |
555 | ||
556 | //subtract background using area method | |
557 | for(Int_t ljet=0; ljet<nJ; ljet++){ | |
558 | Float_t areaRatio = areaJet[ljet]/areaOut; | |
559 | etJet[ljet] = etIn[ljet]-etbgStat*areaRatio; // subtraction | |
560 | } | |
561 | ||
562 | etbgTotalN = etbgStat; | |
563 | ||
564 | } | |
565 | ||
566 | //////////////////////////////////////////////////////////////////////// | |
567 | ||
568 | void AliUA1JetFinderV1::SubtractBackgCone(Int_t& nIn, Int_t&nJ,Float_t& etbgTotalN, | |
569 | Float_t* ptT, Float_t* etaT, Float_t* phiT, | |
570 | Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet, | |
571 | Int_t* multJet, Int_t* injet) | |
572 | { | |
573 | // Cone background subtraction method taking into acount dEt/deta distribution | |
7d0f353c | 574 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
70e58892 | 575 | //general |
7d0f353c | 576 | Float_t rc= header->GetRadius(); |
577 | Float_t etamax = header->GetLegoEtaMax(); | |
578 | Float_t etamin = header->GetLegoEtaMin(); | |
70e58892 | 579 | Int_t ndiv = 100; |
580 | ||
581 | // jet energy and area arrays | |
582 | TH1F* hEtJet[30]; | |
583 | TH1F* hAreaJet[30]; | |
584 | for(Int_t mjet=0; mjet<nJ; mjet++){ | |
585 | char hEtname[256]; char hAreaname[256]; | |
586 | sprintf(hEtname, "hEtJet%d", mjet); sprintf(hAreaname, "hAreaJet%d", mjet); | |
587 | hEtJet[mjet] = new TH1F(hEtname,"et dist in eta ",ndiv,etamin,etamax); | |
588 | hAreaJet[mjet] = new TH1F(hAreaname,"area dist in eta ",ndiv,etamin,etamax); | |
589 | } | |
590 | // background energy and area | |
591 | TH1F* hEtBackg = new TH1F("hEtBackg"," backg et dist in eta ",ndiv,etamin,etamax); | |
592 | TH1F* hAreaBackg = new TH1F("hAreaBackg","backg area dist in eta ",ndiv,etamin,etamax); | |
593 | ||
594 | //fill energies | |
595 | for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array | |
70e58892 | 596 | for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets |
597 | Float_t deta = etaT[jpart] - etaJet[ijet]; | |
98e98c1c | 598 | Float_t dphi = phiT[jpart] - phiJet[ijet]; |
70e58892 | 599 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); |
98e98c1c | 600 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; |
601 | Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi); | |
70e58892 | 602 | if(dr <= rc){ // particles inside this cone |
70e58892 | 603 | injet[jpart] = ijet; |
98e98c1c | 604 | multJet[ijet]++; |
605 | if((fReader->GetCutFlag(jpart)) == 1){// pt cut | |
606 | hEtJet[ijet]->Fill(etaT[jpart],ptT[jpart]); //particle inside cone | |
607 | if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart]; | |
608 | } | |
70e58892 | 609 | break; |
610 | } | |
611 | }// end jets loop | |
970a3bbc | 612 | if(injet[jpart] == -1 && fReader->GetCutFlag(jpart) == 1) |
98e98c1c | 613 | hEtBackg->Fill(etaT[jpart],ptT[jpart]); // particle outside cones |
70e58892 | 614 | } //end particle loop |
615 | ||
616 | //calc areas | |
617 | Float_t eta0 = etamin; | |
618 | Float_t etaw = (etamax - etamin)/((Float_t)ndiv); | |
619 | Float_t eta1 = eta0 + etaw; | |
620 | for(Int_t etabin = 0; etabin< ndiv; etabin++){ // loop for all eta bins | |
621 | Float_t etac = eta0 + etaw/2.0; | |
622 | Float_t areabg = etaw*2.0*TMath::Pi(); | |
623 | for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets | |
624 | Float_t deta0 = TMath::Abs(eta0 - etaJet[ijet]); | |
625 | Float_t deta1 = TMath::Abs(eta1 - etaJet[ijet]); | |
626 | Float_t acc0 = 0.0; Float_t acc1 = 0.0; | |
627 | Float_t areaj = 0.0; | |
628 | if(deta0 > rc && deta1 < rc){ | |
629 | acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1); | |
630 | areaj = acc1; | |
631 | } | |
632 | if(deta0 < rc && deta1 > rc){ | |
633 | acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0); | |
634 | areaj = acc0; | |
635 | } | |
636 | if(deta0 < rc && deta1 < rc){ | |
637 | acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0); | |
638 | acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1); | |
639 | if(eta1<etaJet[ijet]) areaj = acc1-acc0; // case 1 | |
640 | if((eta0 < etaJet[ijet]) && (etaJet[ijet]<eta1)) areaj = rc*rc*TMath::Pi() - acc1 -acc0; // case 2 | |
641 | if(etaJet[ijet] < eta0) areaj = acc0 -acc1; // case 3 | |
642 | } | |
643 | hAreaJet[ijet]->Fill(etac,areaj); | |
644 | areabg = areabg - areaj; | |
645 | } // end jets loop | |
646 | hAreaBackg->Fill(etac,areabg); | |
647 | eta0 = eta1; | |
648 | eta1 = eta1 + etaw; | |
649 | } // end loop for all eta bins | |
650 | ||
651 | //subtract background | |
652 | for(Int_t kjet=0; kjet<nJ; kjet++){ | |
653 | etJet[kjet] = 0.0; // first clear etJet for this jet | |
654 | for(Int_t bin = 0; bin< ndiv; bin++){ | |
655 | if(hAreaJet[kjet]->GetBinContent(bin)){ | |
656 | Float_t areab = hAreaBackg->GetBinContent(bin); | |
657 | Float_t etb = hEtBackg->GetBinContent(bin); | |
658 | Float_t areaR = (hAreaJet[kjet]->GetBinContent(bin))/areab; | |
659 | etJet[kjet] = etJet[kjet] + ((hEtJet[kjet]->GetBinContent(bin)) - etb*areaR); //subtraction | |
660 | } | |
661 | } | |
662 | } | |
663 | ||
664 | // calc background total | |
665 | Double_t etOut = hEtBackg->Integral(); | |
666 | Double_t areaOut = hAreaBackg->Integral(); | |
7d0f353c | 667 | Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi(); |
70e58892 | 668 | etbgTotalN = etOut*areaT/areaOut; |
669 | ||
670 | //delete | |
671 | for(Int_t ljet=0; ljet<nJ; ljet++){ // loop for all jets | |
672 | delete hEtJet[ljet]; | |
673 | delete hAreaJet[ljet]; | |
674 | } | |
675 | ||
676 | delete hEtBackg; | |
677 | delete hAreaBackg; | |
678 | } | |
679 | ||
680 | //////////////////////////////////////////////////////////////////////// | |
681 | ||
682 | ||
683 | void AliUA1JetFinderV1::SubtractBackgRatio(Int_t& nIn, Int_t&nJ,Float_t& etbgTotalN, | |
684 | Float_t* ptT, Float_t* etaT, Float_t* phiT, | |
685 | Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet, | |
686 | Int_t* multJet, Int_t* injet) | |
687 | { | |
688 | // Ratio background subtraction method taking into acount dEt/deta distribution | |
7d0f353c | 689 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
70e58892 | 690 | //factor F calc before |
7d0f353c | 691 | Float_t bgRatioCut = header->GetBackgCutRatio(); |
70e58892 | 692 | |
693 | ||
694 | //general | |
7d0f353c | 695 | Float_t rc= header->GetRadius(); |
696 | Float_t etamax = header->GetLegoEtaMax(); | |
697 | Float_t etamin = header->GetLegoEtaMin(); | |
70e58892 | 698 | Int_t ndiv = 100; |
699 | ||
700 | // jet energy and area arrays | |
701 | TH1F* hEtJet[30]; | |
702 | TH1F* hAreaJet[30]; | |
703 | for(Int_t mjet=0; mjet<nJ; mjet++){ | |
704 | char hEtname[256]; char hAreaname[256]; | |
705 | sprintf(hEtname, "hEtJet%d", mjet); sprintf(hAreaname, "hAreaJet%d", mjet); | |
706 | hEtJet[mjet] = new TH1F(hEtname,"et dist in eta ",ndiv,etamin,etamax); // change range | |
707 | hAreaJet[mjet] = new TH1F(hAreaname,"area dist in eta ",ndiv,etamin,etamax); // change range | |
708 | } | |
709 | // background energy and area | |
710 | TH1F* hEtBackg = new TH1F("hEtBackg"," backg et dist in eta ",ndiv,etamin,etamax); // change range | |
711 | TH1F* hAreaBackg = new TH1F("hAreaBackg","backg area dist in eta ",ndiv,etamin,etamax); // change range | |
712 | ||
713 | //fill energies | |
714 | for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array | |
98e98c1c | 715 | //if((fReader->GetCutFlag(jpart)) != 1) continue; |
70e58892 | 716 | for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets |
717 | Float_t deta = etaT[jpart] - etaJet[ijet]; | |
718 | Float_t dphi = phiT[jpart] - phiJet[ijet]; | |
719 | if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi(); | |
720 | if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi; | |
721 | Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi); | |
722 | if(dr <= rc){ // particles inside this cone | |
70e58892 | 723 | multJet[ijet]++; |
724 | injet[jpart] = ijet; | |
98e98c1c | 725 | if((fReader->GetCutFlag(jpart)) == 1){ //pt cut |
726 | hEtJet[ijet]->Fill(etaT[jpart],ptT[jpart]); //particle inside cone and pt cut | |
727 | if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart]; | |
728 | } | |
70e58892 | 729 | break; |
730 | } | |
731 | }// end jets loop | |
98e98c1c | 732 | if(injet[jpart] == -1) hEtBackg->Fill(etaT[jpart],ptT[jpart]); // particle outside cones |
70e58892 | 733 | } //end particle loop |
734 | ||
735 | //calc areas | |
736 | Float_t eta0 = etamin; | |
737 | Float_t etaw = (etamax - etamin)/((Float_t)ndiv); | |
738 | Float_t eta1 = eta0 + etaw; | |
739 | for(Int_t etabin = 0; etabin< ndiv; etabin++){ // loop for all eta bins | |
740 | Float_t etac = eta0 + etaw/2.0; | |
741 | Float_t areabg = etaw*2.0*TMath::Pi(); | |
742 | for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets | |
743 | Float_t deta0 = TMath::Abs(eta0 - etaJet[ijet]); | |
744 | Float_t deta1 = TMath::Abs(eta1 - etaJet[ijet]); | |
745 | Float_t acc0 = 0.0; Float_t acc1 = 0.0; | |
746 | Float_t areaj = 0.0; | |
747 | if(deta0 > rc && deta1 < rc){ | |
748 | acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1); | |
749 | areaj = acc1; | |
750 | } | |
751 | if(deta0 < rc && deta1 > rc){ | |
752 | acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0); | |
753 | areaj = acc0; | |
754 | } | |
755 | if(deta0 < rc && deta1 < rc){ | |
756 | acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0); | |
757 | acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1); | |
758 | if(eta1<etaJet[ijet]) areaj = acc1-acc0; // case 1 | |
759 | if((eta0 < etaJet[ijet]) && (etaJet[ijet]<eta1)) areaj = rc*rc*TMath::Pi() - acc1 -acc0; // case 2 | |
760 | if(etaJet[ijet] < eta0) areaj = acc0 -acc1; // case 3 | |
761 | } | |
762 | hAreaJet[ijet]->Fill(etac,areaj); | |
763 | areabg = areabg - areaj; | |
764 | } // end jets loop | |
765 | hAreaBackg->Fill(etac,areabg); | |
766 | eta0 = eta1; | |
767 | eta1 = eta1 + etaw; | |
768 | } // end loop for all eta bins | |
769 | ||
770 | //subtract background | |
771 | for(Int_t kjet=0; kjet<nJ; kjet++){ | |
772 | etJet[kjet] = 0.0; // first clear etJet for this jet | |
773 | for(Int_t bin = 0; bin< ndiv; bin++){ | |
774 | if(hAreaJet[kjet]->GetBinContent(bin)){ | |
775 | Float_t areab = hAreaBackg->GetBinContent(bin); | |
776 | Float_t etb = hEtBackg->GetBinContent(bin); | |
777 | Float_t areaR = (hAreaJet[kjet]->GetBinContent(bin))/areab; | |
778 | etJet[kjet] = etJet[kjet] + ((hEtJet[kjet]->GetBinContent(bin)) - etb*areaR*bgRatioCut); //subtraction | |
779 | } | |
780 | } | |
781 | } | |
782 | ||
783 | // calc background total | |
784 | Double_t etOut = hEtBackg->Integral(); | |
785 | Double_t areaOut = hAreaBackg->Integral(); | |
7d0f353c | 786 | Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi(); |
70e58892 | 787 | etbgTotalN = etOut*areaT/areaOut; |
788 | ||
789 | //delete | |
790 | for(Int_t ljet=0; ljet<nJ; ljet++){ // loop for all jets | |
791 | delete hEtJet[ljet]; | |
792 | delete hAreaJet[ljet]; | |
793 | } | |
794 | ||
795 | delete hEtBackg; | |
796 | delete hAreaBackg; | |
797 | } | |
798 | ||
799 | //////////////////////////////////////////////////////////////////////// | |
800 | ||
801 | ||
802 | void AliUA1JetFinderV1::Reset() | |
803 | { | |
804 | fLego->Reset(); | |
805 | fJets->ClearJets(); | |
1d27ecd2 | 806 | fNAODjets = 0; |
70e58892 | 807 | } |
808 | ||
809 | //////////////////////////////////////////////////////////////////////// | |
810 | ||
811 | void AliUA1JetFinderV1::WriteJHeaderToFile() | |
812 | { | |
7d0f353c | 813 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
7d0f353c | 814 | header->Write(); |
70e58892 | 815 | } |
816 | ||
817 | //////////////////////////////////////////////////////////////////////// | |
818 | ||
819 | void AliUA1JetFinderV1::Init() | |
820 | { | |
821 | // initializes some variables | |
7d0f353c | 822 | AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader; |
70e58892 | 823 | // book lego |
824 | fLego = new | |
825 | TH2F("legoH","eta-phi", | |
7d0f353c | 826 | header->GetLegoNbinEta(), header->GetLegoEtaMin(), |
827 | header->GetLegoEtaMax(), header->GetLegoNbinPhi(), | |
828 | header->GetLegoPhiMin(), header->GetLegoPhiMax()); | |
70e58892 | 829 | |
830 | } |