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Made valid calibrations w/range 0-999999 - note oversampling is 4
[u/mrichter/AliRoot.git] / JETAN / AliUA1JetFinderV1.cxx
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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
40ClassImp(AliUA1JetFinderV1)
41
42////////////////////////////////////////////////////////////////////////
43
98e98c1c 44AliUA1JetFinderV1::AliUA1JetFinderV1()
1b7d5d7e 45
98e98c1c 46{
47 // Constructor
48 fHeader = 0x0;
49 fLego = 0x0;
70e58892 50}
51
52////////////////////////////////////////////////////////////////////////
53
54AliUA1JetFinderV1::~AliUA1JetFinderV1()
55
56{
57 // destructor
58}
59
60////////////////////////////////////////////////////////////////////////
61
62
63void 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;
9dda5307 100 fLego ->Fill(etaT[i], phiT[i], ptT[i]);
70e58892 101 hPtTotal->Fill(ptT[i]);
102 etbgTotal+= ptT[i];
103 }
9dda5307 104
70e58892 105 fJets->SetNinput(nIn);
106
107 // calculate total energy and fluctuation in map
108 Double_t meanpt = hPtTotal->GetMean();
9dda5307 109 Double_t ptRMS = hPtTotal->GetRMS();
110 Double_t npart = hPtTotal->GetEntries();
70e58892 111 Double_t dEtTotal = (TMath::Sqrt(npart))*TMath::Sqrt(meanpt * meanpt + ptRMS*ptRMS);
112
113 // arrays to hold jets
114 Float_t* etaJet = new Float_t[30];
115 Float_t* phiJet = new Float_t[30];
116 Float_t* etJet = new Float_t[30];
117 Float_t* etsigJet = new Float_t[30]; //signal et in jet
118 Float_t* etallJet = new Float_t[30]; // total et in jet (tmp variable)
119 Int_t* ncellsJet = new Int_t[30];
120 Int_t* multJet = new Int_t[30];
121 Int_t nJets; // to hold number of jets found by algorithm
122 Int_t nj; // number of jets accepted
7d0f353c 123 Float_t prec = header->GetPrecBg();
70e58892 124 Float_t bgprec = 1;
125 while(bgprec > prec){
126 //reset jet arrays in memory
127 memset(etaJet,0,sizeof(Float_t)*30);
128 memset(phiJet,0,sizeof(Float_t)*30);
129 memset(etJet,0,sizeof(Float_t)*30);
130 memset(etallJet,0,sizeof(Float_t)*30);
131 memset(etsigJet,0,sizeof(Float_t)*30);
132 memset(ncellsJet,0,sizeof(Int_t)*30);
133 memset(multJet,0,sizeof(Int_t)*30);
134 nJets = 0;
135 nj = 0;
136 // reset particles-jet array in memory
98e98c1c 137 memset(injet,-1,sizeof(Int_t)*nIn);
70e58892 138 //run cone algorithm finder
139 RunAlgoritm(etbgTotal,dEtTotal,nJets,etJet,etaJet,phiJet,etallJet,ncellsJet);
140 //run background subtraction
7d0f353c 141 if(nJets > header->GetNAcceptJets()) // limited number of accepted jets per event
142 nj = header->GetNAcceptJets();
70e58892 143 else
144 nj = nJets;
145 //subtract background
146 Float_t etbgTotalN = 0.0; //new background
7d0f353c 147 if(header->GetBackgMode() == 1) // standar
70e58892 148 SubtractBackg(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
7d0f353c 149 if(header->GetBackgMode() == 2) //cone
70e58892 150 SubtractBackgCone(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
7d0f353c 151 if(header->GetBackgMode() == 3) //ratio
70e58892 152 SubtractBackgRatio(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
7d0f353c 153 if(header->GetBackgMode() == 4) //statistic
70e58892 154 SubtractBackgStat(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
155 //calc precision
156 if(etbgTotalN != 0.0)
157 bgprec = (etbgTotal - etbgTotalN)/etbgTotalN;
158 else
159 bgprec = 0;
160 etbgTotal = etbgTotalN; // update with new background estimation
161 } //end while
162
163 // add jets to list
164 Int_t* idxjets = new Int_t[nj];
165 Int_t nselectj = 0;
76c48857 166 printf("Found %d jets \n", nj);
167
70e58892 168 for(Int_t kj=0; kj<nj; kj++){
7d0f353c 169 if ((etaJet[kj] > (header->GetJetEtaMax())) ||
170 (etaJet[kj] < (header->GetJetEtaMin())) ||
171 (etJet[kj] < header->GetMinJetEt())) continue; // acceptance eta range and etmin
70e58892 172 Float_t px, py,pz,en; // convert to 4-vector
173 px = etJet[kj] * TMath::Cos(phiJet[kj]);
174 py = etJet[kj] * TMath::Sin(phiJet[kj]);
175 pz = etJet[kj] / TMath::Tan(2.0 * TMath::ATan(TMath::Exp(-etaJet[kj])));
176 en = TMath::Sqrt(px * px + py * py + pz * pz);
177 fJets->AddJet(px, py, pz, en);
1d27ecd2 178 AliAODJet jet(px, py, pz, en);
179 jet.Print("");
180
181 AddJet(jet);
182
70e58892 183 idxjets[nselectj] = kj;
184 nselectj++;
70e58892 185 }
186 //add signal percentage and total signal in AliJets for analysis tool
187 Float_t* percentage = new Float_t[nselectj];
188 Int_t* ncells = new Int_t[nselectj];
189 Int_t* mult = new Int_t[nselectj];
70e58892 190 for(Int_t i = 0; i< nselectj; i++){
191 percentage[i] = etsigJet[idxjets[i]]/etJet[idxjets[i]];
192 ncells[i] = ncellsJet[idxjets[i]];
193 mult[i] = multJet[idxjets[i]];
194 }
98e98c1c 195 //add particle-injet relationship ///
196 for(Int_t bj = 0; bj < nIn; bj++){
197 if(injet[bj] == -1) continue; //background particle
198 Int_t bflag = 0;
199 for(Int_t ci = 0; ci< nselectj; ci++){
200 if(injet[bj] == idxjets[ci]){
201 injet[bj]= ci;
202 bflag++;
203 break;
204 }
205 }
206 if(bflag == 0) injet[bj] = -1; // set as background particle
207 }
70e58892 208 fJets->SetNCells(ncells);
209 fJets->SetPtFromSignal(percentage);
210 fJets->SetMultiplicities(mult);
211 fJets->SetInJet(injet);
212 fJets->SetEtaIn(etaT);
213 fJets->SetPhiIn(phiT);
214 fJets->SetPtIn(ptT);
7d0f353c 215 fJets->SetEtAvg(etbgTotal/(4*(header->GetLegoEtaMax())*TMath::Pi()));
70e58892 216
217
218 //delete
0ab34e91 219 delete [] ptT;
220 delete [] etaT;
221 delete [] phiT;
222 delete [] injet;
70e58892 223 delete hPtTotal;
0ab34e91 224 delete [] etaJet;
225 delete [] phiJet;
226 delete [] etJet;
227 delete [] etsigJet;
228 delete [] etallJet;
229 delete [] ncellsJet;
230 delete [] multJet;
231 delete [] idxjets;
232 delete [] percentage;
233 delete [] ncells;
234 delete [] mult;
70e58892 235
236
237}
238
239////////////////////////////////////////////////////////////////////////
240
241void AliUA1JetFinderV1::RunAlgoritm(Float_t etbgTotal, Double_t dEtTotal, Int_t& nJets,
242 Float_t* etJet,Float_t* etaJet, Float_t* phiJet,
243 Float_t* etallJet, Int_t* ncellsJet)
244{
245
246 //dump lego
247 // check enough space! *to be done*
7d0f353c 248 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
0ab34e91 249 const Int_t nBinsMax = 70000;
9dda5307 250
0ab34e91 251 Float_t etCell[nBinsMax]; //! Cell Energy
252 Float_t etaCell[nBinsMax]; //! Cell eta
253 Float_t phiCell[nBinsMax]; //! Cell phi
254 Int_t flagCell[nBinsMax]; //! Cell flag
70e58892 255
256 Int_t nCell = 0;
257 TAxis* xaxis = fLego->GetXaxis();
258 TAxis* yaxis = fLego->GetYaxis();
259 Float_t e = 0.0;
7d0f353c 260 for (Int_t i = 1; i <= header->GetLegoNbinEta(); i++) {
261 for (Int_t j = 1; j <= header->GetLegoNbinPhi(); j++) {
70e58892 262 e = fLego->GetBinContent(i,j);
263 if (e < 0.0) continue; // don't include this cells
264 Float_t eta = xaxis->GetBinCenter(i);
265 Float_t phi = yaxis->GetBinCenter(j);
266 etCell[nCell] = e;
267 etaCell[nCell] = eta;
268 phiCell[nCell] = phi;
0ab34e91 269 flagCell[nCell] = 0; //default
70e58892 270 nCell++;
271 }
272 }
273
274 // Parameters from header
7d0f353c 275 Float_t minmove = header->GetMinMove();
276 Float_t maxmove = header->GetMaxMove();
277 Float_t rc = header->GetRadius();
278 Float_t etseed = header->GetEtSeed();
279 //Float_t etmin = header->GetMinJetEt();
70e58892 280
281
282
283 // tmp array of jets form algoritm
284 Float_t etaAlgoJet[30];
285 Float_t phiAlgoJet[30];
286 Float_t etAlgoJet[30];
287 Int_t ncellsAlgoJet[30];
288
289 //run algorithm//
290
291 // sort cells by et
292 Int_t * index = new Int_t[nCell];
293 TMath::Sort(nCell, etCell, index);
294 // variable used in centroide loop
9dda5307 295 Float_t eta = 0.0;
296 Float_t phi = 0.0;
297 Float_t eta0 = 0.0;
298 Float_t phi0 = 0.0;
299 Float_t etab = 0.0;
300 Float_t phib = 0.0;
301 Float_t etas = 0.0;
302 Float_t phis = 0.0;
303 Float_t ets = 0.0;
304 Float_t deta = 0.0;
305 Float_t dphi = 0.0;
306 Float_t dr = 0.0;
307 Float_t etsb = 0.0;
70e58892 308 Float_t etasb = 0.0;
309 Float_t phisb = 0.0;
9dda5307 310 Float_t dphib = 0.0;
311
70e58892 312
313 for(Int_t icell = 0; icell < nCell; icell++){
314 Int_t jcell = index[icell];
315 if(etCell[jcell] <= etseed) continue; // if cell energy is low et seed
316 if(flagCell[jcell] != 0) continue; // if cell was used before
317 eta = etaCell[jcell];
318 phi = phiCell[jcell];
319 eta0 = eta;
320 phi0 = phi;
321 etab = eta;
322 phib = phi;
323 ets = etCell[jcell];
324 etas = 0.0;
325 phis = 0.0;
326 etsb = ets;
327 etasb = 0.0;
328 phisb = 0.0;
329 for(Int_t kcell =0; kcell < nCell; kcell++){
330 Int_t lcell = index[kcell];
9dda5307 331 if(lcell == jcell) continue; // cell itself
332 if(flagCell[lcell] != 0) continue; // cell used before
333 if(etCell[lcell] > etCell[jcell]) continue; // can this happen
70e58892 334 //calculate dr
335 deta = etaCell[lcell] - eta;
9dda5307 336 dphi = TMath::Abs(phiCell[lcell] - phi);
337 if (dphi > TMath::Pi()) dphi = 2. * TMath::Pi() - dphi;
338 dr = TMath::Sqrt(deta * deta + dphi * dphi);
70e58892 339 if(dr <= rc){
340 // calculate offset from initiate cell
341 deta = etaCell[lcell] - eta0;
342 dphi = phiCell[lcell] - phi0;
9dda5307 343 if (dphi < - TMath::Pi()) dphi= dphi + 2.0 * TMath::Pi();
344 if (dphi > TMath::Pi()) dphi = dphi - 2.0 * TMath::Pi();
345
70e58892 346 etas = etas + etCell[lcell]*deta;
347 phis = phis + etCell[lcell]*dphi;
348 ets = ets + etCell[lcell];
349 //new weighted eta and phi including this cell
350 eta = eta0 + etas/ets;
351 phi = phi0 + phis/ets;
352 // if cone does not move much, just go to next step
9dda5307 353 dphib = TMath::Abs(phi - phib);
354 if (dphib > TMath::Pi()) dphib = 2. * TMath::Pi() - dphib;
355 dr = TMath::Sqrt((eta-etab)*(eta-etab) + dphib * dphib);
70e58892 356 if(dr <= minmove) break;
357 // cone should not move more than max_mov
358 dr = TMath::Sqrt((etas/ets)*(etas/ets) + (phis/ets)*(phis/ets));
359 if(dr > maxmove){
9dda5307 360 eta = etab;
361 phi = phib;
362 ets = etsb;
363 etas = etasb;
364 phis = phisb;
365 } else { // store this loop information
366 etab = eta;
367 phib = phi;
368 etsb = ets;
369 etasb = etas;
370 phisb = phis;
70e58892 371 }
9dda5307 372 } // inside cone
70e58892 373 }//end of cells loop looking centroide
374
375 //avoid cones overloap (to be implemented in the future)
376
377 //flag cells in Rc, estimate total energy in cone
378 Float_t etCone = 0.0;
379 Int_t nCellIn = 0;
7d0f353c 380 rc = header->GetRadius();
70e58892 381 for(Int_t ncell =0; ncell < nCell; ncell++){
382 if(flagCell[ncell] != 0) continue; // cell used before
383 //calculate dr
384 deta = etaCell[ncell] - eta;
385 dphi = phiCell[ncell] - phi;
386 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
387 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
388 dr = TMath::Sqrt(deta * deta + dphi * dphi);
389 if(dr <= rc){ // cell in cone
390 flagCell[ncell] = -1;
391 etCone+=etCell[ncell];
392 nCellIn++;
393 }
394 }
395
396 // select jets with et > background
397 // estimate max fluctuation of background in cone
398 Double_t ncellin = (Double_t)nCellIn;
399 Double_t ntcell = (Double_t)nCell;
400 Double_t etbmax = (etbgTotal + dEtTotal )*(ncellin/ntcell);
401 // min cone et
402 Double_t etcmin = etCone ; // could be used etCone - etmin !!
403 //desicions !! etbmax < etcmin
404 for(Int_t mcell =0; mcell < nCell; mcell++){
405 if(flagCell[mcell] == -1){
406 if(etbmax < etcmin)
407 flagCell[mcell] = 1; //flag cell as used
408 else
409 flagCell[mcell] = 0; // leave it free
410 }
411 }
412 //store tmp jet info !!!
98e98c1c 413 if(etbmax < etcmin) {
70e58892 414 etaAlgoJet[nJets] = eta;
415 phiAlgoJet[nJets] = phi;
416 etAlgoJet[nJets] = etCone;
417 ncellsAlgoJet[nJets] = nCellIn;
418 nJets++;
419 }
420
421 } // end of cells loop
422
423 //reorder jets by et in cone
424 //sort jets by energy
425 Int_t * idx = new Int_t[nJets];
426 TMath::Sort(nJets, etAlgoJet, idx);
427 for(Int_t p = 0; p < nJets; p++){
428 etaJet[p] = etaAlgoJet[idx[p]];
429 phiJet[p] = phiAlgoJet[idx[p]];
430 etJet[p] = etAlgoJet[idx[p]];
431 etallJet[p] = etAlgoJet[idx[p]];
432 ncellsJet[p] = ncellsAlgoJet[idx[p]];
433 }
434
435
436 //delete
9dda5307 437 delete[] index;
438 delete[] idx;
70e58892 439
440}
441////////////////////////////////////////////////////////////////////////
442
443void AliUA1JetFinderV1::SubtractBackg(Int_t& nIn, Int_t&nJ, Float_t&etbgTotalN,
444 Float_t* ptT, Float_t* etaT, Float_t* phiT,
445 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
446 Int_t* multJet, Int_t* injet)
447{
448 //background subtraction using cone method but without correction in dE/deta distribution
449
450 //calculate energy inside and outside cones
7d0f353c 451 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
452 Float_t rc= header->GetRadius();
70e58892 453 Float_t etIn[30];
454 Float_t etOut = 0;
455 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
98e98c1c 456 // if((fReader->GetCutFlag(jpart)) != 1) continue; // pt cut
70e58892 457 for(Int_t ijet=0; ijet<nJ; ijet++){
458 Float_t deta = etaT[jpart] - etaJet[ijet];
459 Float_t dphi = phiT[jpart] - phiJet[ijet];
460 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
461 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
462 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
463 if(dr <= rc){ // particles inside this cone
70e58892 464 multJet[ijet]++;
465 injet[jpart] = ijet;
98e98c1c 466 if((fReader->GetCutFlag(jpart)) == 1){ // pt cut
467 etIn[ijet] += ptT[jpart];
468 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet]+= ptT[jpart];
469 }
70e58892 470 break;
471 }
472 }// end jets loop
970a3bbc 473 if(injet[jpart] == -1 && fReader->GetCutFlag(jpart) == 1)
98e98c1c 474 etOut += ptT[jpart]; // particle outside cones and pt cut
70e58892 475 } //end particle loop
476
477 //estimate jets and background areas
478 Float_t areaJet[30];
7d0f353c 479 Float_t areaOut = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 480 for(Int_t k=0; k<nJ; k++){
481 Float_t detamax = etaJet[k] + rc;
482 Float_t detamin = etaJet[k] - rc;
483 Float_t accmax = 0.0; Float_t accmin = 0.0;
7d0f353c 484 if(detamax > header->GetLegoEtaMax()){ // sector outside etamax
485 Float_t h = header->GetLegoEtaMax() - etaJet[k];
70e58892 486 accmax = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
487 }
7d0f353c 488 if(detamin < header->GetLegoEtaMin()){ // sector outside etamin
489 Float_t h = header->GetLegoEtaMax() + etaJet[k];
70e58892 490 accmin = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
491 }
492 areaJet[k] = rc*rc*TMath::Pi() - accmax - accmin;
493 areaOut = areaOut - areaJet[k];
494 }
495 //subtract background using area method
496 for(Int_t ljet=0; ljet<nJ; ljet++){
497 Float_t areaRatio = areaJet[ljet]/areaOut;
498 etJet[ljet] = etIn[ljet]-etOut*areaRatio; // subtraction
499 }
500
501 // estimate new total background
7d0f353c 502 Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 503 etbgTotalN = etOut*areaT/areaOut;
504
505
506}
507
508////////////////////////////////////////////////////////////////////////
509
510void AliUA1JetFinderV1::SubtractBackgStat(Int_t& nIn, Int_t&nJ,Float_t&etbgTotalN,
511 Float_t* ptT, Float_t* etaT, Float_t* phiT,
512 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
513 Int_t* multJet, Int_t* injet)
514{
515
516 //background subtraction using statistical method
7d0f353c 517 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
518 Float_t etbgStat = header->GetBackgStat(); // pre-calculated background
70e58892 519
520 //calculate energy inside
7d0f353c 521 Float_t rc= header->GetRadius();
70e58892 522 Float_t etIn[30];
523
524 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
98e98c1c 525 //if((fReader->GetCutFlag(jpart)) != 1) continue; // pt cut
70e58892 526 for(Int_t ijet=0; ijet<nJ; ijet++){
527 Float_t deta = etaT[jpart] - etaJet[ijet];
528 Float_t dphi = phiT[jpart] - phiJet[ijet];
529 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
530 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
531 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
532 if(dr <= rc){ // particles inside this cone
70e58892 533 multJet[ijet]++;
534 injet[jpart] = ijet;
98e98c1c 535 if((fReader->GetCutFlag(jpart)) == 1){ // pt cut
536 etIn[ijet]+= ptT[jpart];
537 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart];
538 }
70e58892 539 break;
540 }
541 }// end jets loop
542 } //end particle loop
543
544 //calc jets areas
545 Float_t areaJet[30];
7d0f353c 546 Float_t areaOut = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 547 for(Int_t k=0; k<nJ; k++){
548 Float_t detamax = etaJet[k] + rc;
549 Float_t detamin = etaJet[k] - rc;
550 Float_t accmax = 0.0; Float_t accmin = 0.0;
7d0f353c 551 if(detamax > header->GetLegoEtaMax()){ // sector outside etamax
552 Float_t h = header->GetLegoEtaMax() - etaJet[k];
70e58892 553 accmax = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
554 }
7d0f353c 555 if(detamin < header->GetLegoEtaMin()){ // sector outside etamin
556 Float_t h = header->GetLegoEtaMax() + etaJet[k];
70e58892 557 accmin = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
558 }
559 areaJet[k] = rc*rc*TMath::Pi() - accmax - accmin;
560 }
561
562 //subtract background using area method
563 for(Int_t ljet=0; ljet<nJ; ljet++){
564 Float_t areaRatio = areaJet[ljet]/areaOut;
565 etJet[ljet] = etIn[ljet]-etbgStat*areaRatio; // subtraction
566 }
567
568 etbgTotalN = etbgStat;
569
570}
571
572////////////////////////////////////////////////////////////////////////
573
574void AliUA1JetFinderV1::SubtractBackgCone(Int_t& nIn, Int_t&nJ,Float_t& etbgTotalN,
575 Float_t* ptT, Float_t* etaT, Float_t* phiT,
576 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
577 Int_t* multJet, Int_t* injet)
578{
579 // Cone background subtraction method taking into acount dEt/deta distribution
7d0f353c 580 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 581 //general
7d0f353c 582 Float_t rc= header->GetRadius();
583 Float_t etamax = header->GetLegoEtaMax();
584 Float_t etamin = header->GetLegoEtaMin();
70e58892 585 Int_t ndiv = 100;
586
587 // jet energy and area arrays
588 TH1F* hEtJet[30];
589 TH1F* hAreaJet[30];
590 for(Int_t mjet=0; mjet<nJ; mjet++){
591 char hEtname[256]; char hAreaname[256];
592 sprintf(hEtname, "hEtJet%d", mjet); sprintf(hAreaname, "hAreaJet%d", mjet);
593 hEtJet[mjet] = new TH1F(hEtname,"et dist in eta ",ndiv,etamin,etamax);
594 hAreaJet[mjet] = new TH1F(hAreaname,"area dist in eta ",ndiv,etamin,etamax);
595 }
596 // background energy and area
597 TH1F* hEtBackg = new TH1F("hEtBackg"," backg et dist in eta ",ndiv,etamin,etamax);
598 TH1F* hAreaBackg = new TH1F("hAreaBackg","backg area dist in eta ",ndiv,etamin,etamax);
599
600 //fill energies
601 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
70e58892 602 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
603 Float_t deta = etaT[jpart] - etaJet[ijet];
98e98c1c 604 Float_t dphi = phiT[jpart] - phiJet[ijet];
70e58892 605 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
98e98c1c 606 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
607 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
70e58892 608 if(dr <= rc){ // particles inside this cone
70e58892 609 injet[jpart] = ijet;
98e98c1c 610 multJet[ijet]++;
611 if((fReader->GetCutFlag(jpart)) == 1){// pt cut
612 hEtJet[ijet]->Fill(etaT[jpart],ptT[jpart]); //particle inside cone
613 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart];
614 }
70e58892 615 break;
616 }
617 }// end jets loop
970a3bbc 618 if(injet[jpart] == -1 && fReader->GetCutFlag(jpart) == 1)
98e98c1c 619 hEtBackg->Fill(etaT[jpart],ptT[jpart]); // particle outside cones
70e58892 620 } //end particle loop
621
622 //calc areas
623 Float_t eta0 = etamin;
624 Float_t etaw = (etamax - etamin)/((Float_t)ndiv);
625 Float_t eta1 = eta0 + etaw;
626 for(Int_t etabin = 0; etabin< ndiv; etabin++){ // loop for all eta bins
627 Float_t etac = eta0 + etaw/2.0;
628 Float_t areabg = etaw*2.0*TMath::Pi();
629 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
630 Float_t deta0 = TMath::Abs(eta0 - etaJet[ijet]);
631 Float_t deta1 = TMath::Abs(eta1 - etaJet[ijet]);
632 Float_t acc0 = 0.0; Float_t acc1 = 0.0;
633 Float_t areaj = 0.0;
634 if(deta0 > rc && deta1 < rc){
635 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
636 areaj = acc1;
637 }
638 if(deta0 < rc && deta1 > rc){
639 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
640 areaj = acc0;
641 }
642 if(deta0 < rc && deta1 < rc){
643 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
644 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
645 if(eta1<etaJet[ijet]) areaj = acc1-acc0; // case 1
646 if((eta0 < etaJet[ijet]) && (etaJet[ijet]<eta1)) areaj = rc*rc*TMath::Pi() - acc1 -acc0; // case 2
647 if(etaJet[ijet] < eta0) areaj = acc0 -acc1; // case 3
648 }
649 hAreaJet[ijet]->Fill(etac,areaj);
650 areabg = areabg - areaj;
651 } // end jets loop
652 hAreaBackg->Fill(etac,areabg);
653 eta0 = eta1;
654 eta1 = eta1 + etaw;
655 } // end loop for all eta bins
656
657 //subtract background
658 for(Int_t kjet=0; kjet<nJ; kjet++){
659 etJet[kjet] = 0.0; // first clear etJet for this jet
660 for(Int_t bin = 0; bin< ndiv; bin++){
661 if(hAreaJet[kjet]->GetBinContent(bin)){
662 Float_t areab = hAreaBackg->GetBinContent(bin);
663 Float_t etb = hEtBackg->GetBinContent(bin);
664 Float_t areaR = (hAreaJet[kjet]->GetBinContent(bin))/areab;
665 etJet[kjet] = etJet[kjet] + ((hEtJet[kjet]->GetBinContent(bin)) - etb*areaR); //subtraction
666 }
667 }
668 }
669
670 // calc background total
671 Double_t etOut = hEtBackg->Integral();
672 Double_t areaOut = hAreaBackg->Integral();
7d0f353c 673 Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 674 etbgTotalN = etOut*areaT/areaOut;
675
676 //delete
677 for(Int_t ljet=0; ljet<nJ; ljet++){ // loop for all jets
678 delete hEtJet[ljet];
679 delete hAreaJet[ljet];
680 }
681
682 delete hEtBackg;
683 delete hAreaBackg;
684}
685
686////////////////////////////////////////////////////////////////////////
687
688
689void AliUA1JetFinderV1::SubtractBackgRatio(Int_t& nIn, Int_t&nJ,Float_t& etbgTotalN,
690 Float_t* ptT, Float_t* etaT, Float_t* phiT,
691 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
692 Int_t* multJet, Int_t* injet)
693{
694 // Ratio background subtraction method taking into acount dEt/deta distribution
7d0f353c 695 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 696 //factor F calc before
7d0f353c 697 Float_t bgRatioCut = header->GetBackgCutRatio();
70e58892 698
699
700 //general
7d0f353c 701 Float_t rc= header->GetRadius();
702 Float_t etamax = header->GetLegoEtaMax();
703 Float_t etamin = header->GetLegoEtaMin();
70e58892 704 Int_t ndiv = 100;
705
706 // jet energy and area arrays
707 TH1F* hEtJet[30];
708 TH1F* hAreaJet[30];
709 for(Int_t mjet=0; mjet<nJ; mjet++){
710 char hEtname[256]; char hAreaname[256];
711 sprintf(hEtname, "hEtJet%d", mjet); sprintf(hAreaname, "hAreaJet%d", mjet);
712 hEtJet[mjet] = new TH1F(hEtname,"et dist in eta ",ndiv,etamin,etamax); // change range
713 hAreaJet[mjet] = new TH1F(hAreaname,"area dist in eta ",ndiv,etamin,etamax); // change range
714 }
715 // background energy and area
716 TH1F* hEtBackg = new TH1F("hEtBackg"," backg et dist in eta ",ndiv,etamin,etamax); // change range
717 TH1F* hAreaBackg = new TH1F("hAreaBackg","backg area dist in eta ",ndiv,etamin,etamax); // change range
718
719 //fill energies
720 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
98e98c1c 721 //if((fReader->GetCutFlag(jpart)) != 1) continue;
70e58892 722 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
723 Float_t deta = etaT[jpart] - etaJet[ijet];
724 Float_t dphi = phiT[jpart] - phiJet[ijet];
725 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
726 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
727 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
728 if(dr <= rc){ // particles inside this cone
70e58892 729 multJet[ijet]++;
730 injet[jpart] = ijet;
98e98c1c 731 if((fReader->GetCutFlag(jpart)) == 1){ //pt cut
732 hEtJet[ijet]->Fill(etaT[jpart],ptT[jpart]); //particle inside cone and pt cut
733 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart];
734 }
70e58892 735 break;
736 }
737 }// end jets loop
98e98c1c 738 if(injet[jpart] == -1) hEtBackg->Fill(etaT[jpart],ptT[jpart]); // particle outside cones
70e58892 739 } //end particle loop
740
741 //calc areas
742 Float_t eta0 = etamin;
743 Float_t etaw = (etamax - etamin)/((Float_t)ndiv);
744 Float_t eta1 = eta0 + etaw;
745 for(Int_t etabin = 0; etabin< ndiv; etabin++){ // loop for all eta bins
746 Float_t etac = eta0 + etaw/2.0;
747 Float_t areabg = etaw*2.0*TMath::Pi();
748 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
749 Float_t deta0 = TMath::Abs(eta0 - etaJet[ijet]);
750 Float_t deta1 = TMath::Abs(eta1 - etaJet[ijet]);
751 Float_t acc0 = 0.0; Float_t acc1 = 0.0;
752 Float_t areaj = 0.0;
753 if(deta0 > rc && deta1 < rc){
754 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
755 areaj = acc1;
756 }
757 if(deta0 < rc && deta1 > rc){
758 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
759 areaj = acc0;
760 }
761 if(deta0 < rc && deta1 < rc){
762 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
763 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
764 if(eta1<etaJet[ijet]) areaj = acc1-acc0; // case 1
765 if((eta0 < etaJet[ijet]) && (etaJet[ijet]<eta1)) areaj = rc*rc*TMath::Pi() - acc1 -acc0; // case 2
766 if(etaJet[ijet] < eta0) areaj = acc0 -acc1; // case 3
767 }
768 hAreaJet[ijet]->Fill(etac,areaj);
769 areabg = areabg - areaj;
770 } // end jets loop
771 hAreaBackg->Fill(etac,areabg);
772 eta0 = eta1;
773 eta1 = eta1 + etaw;
774 } // end loop for all eta bins
775
776 //subtract background
777 for(Int_t kjet=0; kjet<nJ; kjet++){
778 etJet[kjet] = 0.0; // first clear etJet for this jet
779 for(Int_t bin = 0; bin< ndiv; bin++){
780 if(hAreaJet[kjet]->GetBinContent(bin)){
781 Float_t areab = hAreaBackg->GetBinContent(bin);
782 Float_t etb = hEtBackg->GetBinContent(bin);
783 Float_t areaR = (hAreaJet[kjet]->GetBinContent(bin))/areab;
784 etJet[kjet] = etJet[kjet] + ((hEtJet[kjet]->GetBinContent(bin)) - etb*areaR*bgRatioCut); //subtraction
785 }
786 }
787 }
788
789 // calc background total
790 Double_t etOut = hEtBackg->Integral();
791 Double_t areaOut = hAreaBackg->Integral();
7d0f353c 792 Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 793 etbgTotalN = etOut*areaT/areaOut;
794
795 //delete
796 for(Int_t ljet=0; ljet<nJ; ljet++){ // loop for all jets
797 delete hEtJet[ljet];
798 delete hAreaJet[ljet];
799 }
800
801 delete hEtBackg;
802 delete hAreaBackg;
803}
804
805////////////////////////////////////////////////////////////////////////
806
807
808void AliUA1JetFinderV1::Reset()
809{
810 fLego->Reset();
811 fJets->ClearJets();
ad8ada26 812 AliJetFinder::Reset();
70e58892 813}
814
815////////////////////////////////////////////////////////////////////////
816
817void AliUA1JetFinderV1::WriteJHeaderToFile()
818{
7d0f353c 819 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
7d0f353c 820 header->Write();
70e58892 821}
822
823////////////////////////////////////////////////////////////////////////
824
825void AliUA1JetFinderV1::Init()
826{
827 // initializes some variables
7d0f353c 828 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 829 // book lego
830 fLego = new
831 TH2F("legoH","eta-phi",
7d0f353c 832 header->GetLegoNbinEta(), header->GetLegoEtaMin(),
833 header->GetLegoEtaMax(), header->GetLegoNbinPhi(),
834 header->GetLegoPhiMin(), header->GetLegoPhiMax());
70e58892 835
9dda5307 836
70e58892 837}