]> git.uio.no Git - u/mrichter/AliRoot.git/blame - JETAN/AliUA1JetFinderV1.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Reference to tracks forming the jet added.
[u/mrichter/AliRoot.git] / JETAN / AliUA1JetFinderV1.cxx
CommitLineData
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"
d9eba389 38#include "AliLog.h"
70e58892 39
40
41ClassImp(AliUA1JetFinderV1)
42
9e4cc50d 43/////////////////////////////////////////////////////////////////////
1b7d5d7e 44
9e4cc50d 45AliUA1JetFinderV1::AliUA1JetFinderV1() :
46 AliJetFinder(),
47 fLego(0)
98e98c1c 48{
49 // Constructor
70e58892 50}
51
52////////////////////////////////////////////////////////////////////////
53
54AliUA1JetFinderV1::~AliUA1JetFinderV1()
55
56{
57 // destructor
c1f55a27 58 delete fLego;
59 fLego = 0;
70e58892 60}
61
62////////////////////////////////////////////////////////////////////////
63
64
65void AliUA1JetFinderV1::FindJets()
66
67{
68 //1) Fill cell map array
69 //2) calculate total energy and fluctuation level
70 //3) Run algorithm
71 // 3.1) look centroides in cell map
72 // 3.2) calculate total energy in cones
73 // 3.3) flag as a possible jet
74 // 3.4) reorder cones by energy
75 //4) subtract backg in accepted jets
76 //5) fill AliJet list
77
78 // transform input to pt,eta,phi plus lego
7d0f353c 79
80 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 81 TClonesArray *lvArray = fReader->GetMomentumArray();
82 Int_t nIn = lvArray->GetEntries();
83 if (nIn == 0) return;
84
85 // local arrays for input
1d27ecd2 86 Float_t* ptT = new Float_t[nIn];
87 Float_t* etaT = new Float_t[nIn];
88 Float_t* phiT = new Float_t[nIn];
70e58892 89 Int_t* injet = new Int_t[nIn];
90
91 //total energy in array
92 Float_t etbgTotal = 0.0;
93 TH1F* hPtTotal = new TH1F("hPt","Pt distribution of all particles ",100,0.0,15.0);
94
95 // load input vectors and calculate total energy in array
96 for (Int_t i = 0; i < nIn; i++){
97 TLorentzVector *lv = (TLorentzVector*) lvArray->At(i);
98 ptT[i] = lv->Pt();
99 etaT[i] = lv->Eta();
100 phiT[i] = ((lv->Phi() < 0) ? (lv->Phi()) + 2 * TMath::Pi() : lv->Phi());
101 if (fReader->GetCutFlag(i) != 1) continue;
9dda5307 102 fLego ->Fill(etaT[i], phiT[i], ptT[i]);
70e58892 103 hPtTotal->Fill(ptT[i]);
104 etbgTotal+= ptT[i];
105 }
9dda5307 106
70e58892 107 fJets->SetNinput(nIn);
108
109 // calculate total energy and fluctuation in map
110 Double_t meanpt = hPtTotal->GetMean();
9dda5307 111 Double_t ptRMS = hPtTotal->GetRMS();
112 Double_t npart = hPtTotal->GetEntries();
70e58892 113 Double_t dEtTotal = (TMath::Sqrt(npart))*TMath::Sqrt(meanpt * meanpt + ptRMS*ptRMS);
114
115 // arrays to hold jets
116 Float_t* etaJet = new Float_t[30];
117 Float_t* phiJet = new Float_t[30];
118 Float_t* etJet = new Float_t[30];
119 Float_t* etsigJet = new Float_t[30]; //signal et in jet
120 Float_t* etallJet = new Float_t[30]; // total et in jet (tmp variable)
121 Int_t* ncellsJet = new Int_t[30];
122 Int_t* multJet = new Int_t[30];
123 Int_t nJets; // to hold number of jets found by algorithm
124 Int_t nj; // number of jets accepted
7d0f353c 125 Float_t prec = header->GetPrecBg();
70e58892 126 Float_t bgprec = 1;
127 while(bgprec > prec){
128 //reset jet arrays in memory
129 memset(etaJet,0,sizeof(Float_t)*30);
130 memset(phiJet,0,sizeof(Float_t)*30);
131 memset(etJet,0,sizeof(Float_t)*30);
132 memset(etallJet,0,sizeof(Float_t)*30);
133 memset(etsigJet,0,sizeof(Float_t)*30);
134 memset(ncellsJet,0,sizeof(Int_t)*30);
135 memset(multJet,0,sizeof(Int_t)*30);
136 nJets = 0;
137 nj = 0;
138 // reset particles-jet array in memory
98e98c1c 139 memset(injet,-1,sizeof(Int_t)*nIn);
70e58892 140 //run cone algorithm finder
141 RunAlgoritm(etbgTotal,dEtTotal,nJets,etJet,etaJet,phiJet,etallJet,ncellsJet);
142 //run background subtraction
7d0f353c 143 if(nJets > header->GetNAcceptJets()) // limited number of accepted jets per event
144 nj = header->GetNAcceptJets();
70e58892 145 else
146 nj = nJets;
147 //subtract background
148 Float_t etbgTotalN = 0.0; //new background
7d0f353c 149 if(header->GetBackgMode() == 1) // standar
70e58892 150 SubtractBackg(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
7d0f353c 151 if(header->GetBackgMode() == 2) //cone
70e58892 152 SubtractBackgCone(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
7d0f353c 153 if(header->GetBackgMode() == 3) //ratio
70e58892 154 SubtractBackgRatio(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
7d0f353c 155 if(header->GetBackgMode() == 4) //statistic
70e58892 156 SubtractBackgStat(nIn,nj,etbgTotalN,ptT,etaT,phiT,etJet,etaJet,phiJet,etsigJet,multJet,injet);
157 //calc precision
158 if(etbgTotalN != 0.0)
159 bgprec = (etbgTotal - etbgTotalN)/etbgTotalN;
160 else
161 bgprec = 0;
162 etbgTotal = etbgTotalN; // update with new background estimation
163 } //end while
164
f1744ef9 165 // add tracks to the jet if it wasn't yet done
166 if (header->GetBackgMode() == 0){
167 Float_t rc= header->GetRadius();
168 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
169 for(Int_t ijet=0; ijet<nj; ijet++){
170 Float_t deta = etaT[jpart] - etaJet[ijet];
171 Float_t dphi = phiT[jpart] - phiJet[ijet];
172 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
173 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
174 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
175 if(dr <= rc){ // particles inside this cone
176 injet[jpart] = ijet;
177 break;
178 }
179 }// end jets loop
180 } //end particle loop
181 }
182
70e58892 183 // add jets to list
184 Int_t* idxjets = new Int_t[nj];
185 Int_t nselectj = 0;
99513b18 186// printf("Found %d jets \n", nj);
76c48857 187
c02b94ea 188 TRefArray *refs = 0;
189 Bool_t fromAod = !strcmp(fReader->ClassName(),"AliJetAODReader");
190 if (fromAod) refs = fReader->GetReferences();
70e58892 191 for(Int_t kj=0; kj<nj; kj++){
7d0f353c 192 if ((etaJet[kj] > (header->GetJetEtaMax())) ||
193 (etaJet[kj] < (header->GetJetEtaMin())) ||
194 (etJet[kj] < header->GetMinJetEt())) continue; // acceptance eta range and etmin
70e58892 195 Float_t px, py,pz,en; // convert to 4-vector
196 px = etJet[kj] * TMath::Cos(phiJet[kj]);
197 py = etJet[kj] * TMath::Sin(phiJet[kj]);
198 pz = etJet[kj] / TMath::Tan(2.0 * TMath::ATan(TMath::Exp(-etaJet[kj])));
199 en = TMath::Sqrt(px * px + py * py + pz * pz);
200 fJets->AddJet(px, py, pz, en);
1d27ecd2 201 AliAODJet jet(px, py, pz, en);
1eef1eb4 202
c02b94ea 203 if (fromAod){
204 for(Int_t jpart = 0; jpart < nIn; jpart++) // loop for all particles in array
205 if (injet[jpart] == kj && fReader->GetCutFlag(jpart) == 1)
206 jet.AddTrack(refs->At(jpart)); // check if the particle belongs to the jet and add the ref
207 }
1eef1eb4 208
99513b18 209 //jet.Print("");
1d27ecd2 210
211 AddJet(jet);
212
70e58892 213 idxjets[nselectj] = kj;
214 nselectj++;
1eef1eb4 215 } //end particle loop
216
70e58892 217 //add signal percentage and total signal in AliJets for analysis tool
218 Float_t* percentage = new Float_t[nselectj];
219 Int_t* ncells = new Int_t[nselectj];
220 Int_t* mult = new Int_t[nselectj];
70e58892 221 for(Int_t i = 0; i< nselectj; i++){
222 percentage[i] = etsigJet[idxjets[i]]/etJet[idxjets[i]];
223 ncells[i] = ncellsJet[idxjets[i]];
224 mult[i] = multJet[idxjets[i]];
225 }
98e98c1c 226 //add particle-injet relationship ///
227 for(Int_t bj = 0; bj < nIn; bj++){
228 if(injet[bj] == -1) continue; //background particle
229 Int_t bflag = 0;
230 for(Int_t ci = 0; ci< nselectj; ci++){
231 if(injet[bj] == idxjets[ci]){
232 injet[bj]= ci;
233 bflag++;
234 break;
235 }
236 }
237 if(bflag == 0) injet[bj] = -1; // set as background particle
238 }
70e58892 239 fJets->SetNCells(ncells);
240 fJets->SetPtFromSignal(percentage);
241 fJets->SetMultiplicities(mult);
242 fJets->SetInJet(injet);
243 fJets->SetEtaIn(etaT);
244 fJets->SetPhiIn(phiT);
245 fJets->SetPtIn(ptT);
7d0f353c 246 fJets->SetEtAvg(etbgTotal/(4*(header->GetLegoEtaMax())*TMath::Pi()));
70e58892 247
248
249 //delete
0ab34e91 250 delete [] ptT;
251 delete [] etaT;
252 delete [] phiT;
253 delete [] injet;
70e58892 254 delete hPtTotal;
0ab34e91 255 delete [] etaJet;
256 delete [] phiJet;
257 delete [] etJet;
258 delete [] etsigJet;
259 delete [] etallJet;
260 delete [] ncellsJet;
261 delete [] multJet;
262 delete [] idxjets;
263 delete [] percentage;
264 delete [] ncells;
265 delete [] mult;
70e58892 266
267
268}
269
270////////////////////////////////////////////////////////////////////////
271
272void AliUA1JetFinderV1::RunAlgoritm(Float_t etbgTotal, Double_t dEtTotal, Int_t& nJets,
273 Float_t* etJet,Float_t* etaJet, Float_t* phiJet,
274 Float_t* etallJet, Int_t* ncellsJet)
275{
276
277 //dump lego
7d0f353c 278 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
d9eba389 279 const Int_t nBinsMax = 120000; // we use a fixed array not to fragment memory
9dda5307 280
d9eba389 281 const Int_t nBinEta = header->GetLegoNbinEta();
282 const Int_t nBinPhi = header->GetLegoNbinPhi();
283 if((nBinPhi*nBinEta)>nBinsMax){
284 AliError("Too many bins of the ETA-PHI histogram");
285 }
286
0ab34e91 287 Float_t etCell[nBinsMax]; //! Cell Energy
288 Float_t etaCell[nBinsMax]; //! Cell eta
289 Float_t phiCell[nBinsMax]; //! Cell phi
d9eba389 290 Short_t flagCell[nBinsMax]; //! Cell flag
70e58892 291
292 Int_t nCell = 0;
293 TAxis* xaxis = fLego->GetXaxis();
294 TAxis* yaxis = fLego->GetYaxis();
295 Float_t e = 0.0;
d9eba389 296 for (Int_t i = 1; i <= nBinEta; i++) {
297 for (Int_t j = 1; j <= nBinPhi; j++) {
70e58892 298 e = fLego->GetBinContent(i,j);
299 if (e < 0.0) continue; // don't include this cells
300 Float_t eta = xaxis->GetBinCenter(i);
301 Float_t phi = yaxis->GetBinCenter(j);
302 etCell[nCell] = e;
303 etaCell[nCell] = eta;
304 phiCell[nCell] = phi;
0ab34e91 305 flagCell[nCell] = 0; //default
70e58892 306 nCell++;
307 }
308 }
309
310 // Parameters from header
7d0f353c 311 Float_t minmove = header->GetMinMove();
312 Float_t maxmove = header->GetMaxMove();
313 Float_t rc = header->GetRadius();
314 Float_t etseed = header->GetEtSeed();
315 //Float_t etmin = header->GetMinJetEt();
70e58892 316
317
318
319 // tmp array of jets form algoritm
320 Float_t etaAlgoJet[30];
321 Float_t phiAlgoJet[30];
322 Float_t etAlgoJet[30];
323 Int_t ncellsAlgoJet[30];
324
325 //run algorithm//
326
327 // sort cells by et
328 Int_t * index = new Int_t[nCell];
329 TMath::Sort(nCell, etCell, index);
330 // variable used in centroide loop
9dda5307 331 Float_t eta = 0.0;
332 Float_t phi = 0.0;
333 Float_t eta0 = 0.0;
334 Float_t phi0 = 0.0;
335 Float_t etab = 0.0;
336 Float_t phib = 0.0;
337 Float_t etas = 0.0;
338 Float_t phis = 0.0;
339 Float_t ets = 0.0;
340 Float_t deta = 0.0;
341 Float_t dphi = 0.0;
342 Float_t dr = 0.0;
343 Float_t etsb = 0.0;
70e58892 344 Float_t etasb = 0.0;
345 Float_t phisb = 0.0;
9dda5307 346 Float_t dphib = 0.0;
347
70e58892 348
349 for(Int_t icell = 0; icell < nCell; icell++){
350 Int_t jcell = index[icell];
351 if(etCell[jcell] <= etseed) continue; // if cell energy is low et seed
352 if(flagCell[jcell] != 0) continue; // if cell was used before
353 eta = etaCell[jcell];
354 phi = phiCell[jcell];
355 eta0 = eta;
356 phi0 = phi;
357 etab = eta;
358 phib = phi;
359 ets = etCell[jcell];
360 etas = 0.0;
361 phis = 0.0;
362 etsb = ets;
363 etasb = 0.0;
364 phisb = 0.0;
365 for(Int_t kcell =0; kcell < nCell; kcell++){
366 Int_t lcell = index[kcell];
9dda5307 367 if(lcell == jcell) continue; // cell itself
368 if(flagCell[lcell] != 0) continue; // cell used before
369 if(etCell[lcell] > etCell[jcell]) continue; // can this happen
70e58892 370 //calculate dr
371 deta = etaCell[lcell] - eta;
9dda5307 372 dphi = TMath::Abs(phiCell[lcell] - phi);
373 if (dphi > TMath::Pi()) dphi = 2. * TMath::Pi() - dphi;
374 dr = TMath::Sqrt(deta * deta + dphi * dphi);
70e58892 375 if(dr <= rc){
376 // calculate offset from initiate cell
377 deta = etaCell[lcell] - eta0;
378 dphi = phiCell[lcell] - phi0;
9dda5307 379 if (dphi < - TMath::Pi()) dphi= dphi + 2.0 * TMath::Pi();
380 if (dphi > TMath::Pi()) dphi = dphi - 2.0 * TMath::Pi();
381
70e58892 382 etas = etas + etCell[lcell]*deta;
383 phis = phis + etCell[lcell]*dphi;
384 ets = ets + etCell[lcell];
385 //new weighted eta and phi including this cell
386 eta = eta0 + etas/ets;
387 phi = phi0 + phis/ets;
388 // if cone does not move much, just go to next step
9dda5307 389 dphib = TMath::Abs(phi - phib);
390 if (dphib > TMath::Pi()) dphib = 2. * TMath::Pi() - dphib;
391 dr = TMath::Sqrt((eta-etab)*(eta-etab) + dphib * dphib);
70e58892 392 if(dr <= minmove) break;
393 // cone should not move more than max_mov
394 dr = TMath::Sqrt((etas/ets)*(etas/ets) + (phis/ets)*(phis/ets));
395 if(dr > maxmove){
9dda5307 396 eta = etab;
397 phi = phib;
398 ets = etsb;
399 etas = etasb;
400 phis = phisb;
401 } else { // store this loop information
402 etab = eta;
403 phib = phi;
404 etsb = ets;
405 etasb = etas;
406 phisb = phis;
70e58892 407 }
9dda5307 408 } // inside cone
70e58892 409 }//end of cells loop looking centroide
410
411 //avoid cones overloap (to be implemented in the future)
412
413 //flag cells in Rc, estimate total energy in cone
414 Float_t etCone = 0.0;
415 Int_t nCellIn = 0;
7d0f353c 416 rc = header->GetRadius();
70e58892 417 for(Int_t ncell =0; ncell < nCell; ncell++){
418 if(flagCell[ncell] != 0) continue; // cell used before
419 //calculate dr
420 deta = etaCell[ncell] - eta;
421 dphi = phiCell[ncell] - phi;
422 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
423 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
424 dr = TMath::Sqrt(deta * deta + dphi * dphi);
425 if(dr <= rc){ // cell in cone
426 flagCell[ncell] = -1;
427 etCone+=etCell[ncell];
428 nCellIn++;
429 }
430 }
431
432 // select jets with et > background
433 // estimate max fluctuation of background in cone
434 Double_t ncellin = (Double_t)nCellIn;
435 Double_t ntcell = (Double_t)nCell;
436 Double_t etbmax = (etbgTotal + dEtTotal )*(ncellin/ntcell);
437 // min cone et
438 Double_t etcmin = etCone ; // could be used etCone - etmin !!
439 //desicions !! etbmax < etcmin
440 for(Int_t mcell =0; mcell < nCell; mcell++){
441 if(flagCell[mcell] == -1){
442 if(etbmax < etcmin)
443 flagCell[mcell] = 1; //flag cell as used
444 else
445 flagCell[mcell] = 0; // leave it free
446 }
447 }
448 //store tmp jet info !!!
98e98c1c 449 if(etbmax < etcmin) {
70e58892 450 etaAlgoJet[nJets] = eta;
451 phiAlgoJet[nJets] = phi;
452 etAlgoJet[nJets] = etCone;
453 ncellsAlgoJet[nJets] = nCellIn;
454 nJets++;
455 }
456
457 } // end of cells loop
458
459 //reorder jets by et in cone
460 //sort jets by energy
461 Int_t * idx = new Int_t[nJets];
462 TMath::Sort(nJets, etAlgoJet, idx);
463 for(Int_t p = 0; p < nJets; p++){
464 etaJet[p] = etaAlgoJet[idx[p]];
465 phiJet[p] = phiAlgoJet[idx[p]];
466 etJet[p] = etAlgoJet[idx[p]];
467 etallJet[p] = etAlgoJet[idx[p]];
468 ncellsJet[p] = ncellsAlgoJet[idx[p]];
469 }
470
471
472 //delete
9dda5307 473 delete[] index;
474 delete[] idx;
70e58892 475
476}
477////////////////////////////////////////////////////////////////////////
478
479void AliUA1JetFinderV1::SubtractBackg(Int_t& nIn, Int_t&nJ, Float_t&etbgTotalN,
480 Float_t* ptT, Float_t* etaT, Float_t* phiT,
481 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
482 Int_t* multJet, Int_t* injet)
483{
484 //background subtraction using cone method but without correction in dE/deta distribution
485
486 //calculate energy inside and outside cones
7d0f353c 487 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
488 Float_t rc= header->GetRadius();
70e58892 489 Float_t etIn[30];
490 Float_t etOut = 0;
491 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
98e98c1c 492 // if((fReader->GetCutFlag(jpart)) != 1) continue; // pt cut
70e58892 493 for(Int_t ijet=0; ijet<nJ; ijet++){
494 Float_t deta = etaT[jpart] - etaJet[ijet];
495 Float_t dphi = phiT[jpart] - phiJet[ijet];
496 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
497 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
498 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
499 if(dr <= rc){ // particles inside this cone
70e58892 500 multJet[ijet]++;
501 injet[jpart] = ijet;
98e98c1c 502 if((fReader->GetCutFlag(jpart)) == 1){ // pt cut
503 etIn[ijet] += ptT[jpart];
504 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet]+= ptT[jpart];
505 }
70e58892 506 break;
507 }
508 }// end jets loop
970a3bbc 509 if(injet[jpart] == -1 && fReader->GetCutFlag(jpart) == 1)
98e98c1c 510 etOut += ptT[jpart]; // particle outside cones and pt cut
70e58892 511 } //end particle loop
512
513 //estimate jets and background areas
514 Float_t areaJet[30];
7d0f353c 515 Float_t areaOut = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 516 for(Int_t k=0; k<nJ; k++){
517 Float_t detamax = etaJet[k] + rc;
518 Float_t detamin = etaJet[k] - rc;
519 Float_t accmax = 0.0; Float_t accmin = 0.0;
7d0f353c 520 if(detamax > header->GetLegoEtaMax()){ // sector outside etamax
521 Float_t h = header->GetLegoEtaMax() - etaJet[k];
70e58892 522 accmax = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
523 }
7d0f353c 524 if(detamin < header->GetLegoEtaMin()){ // sector outside etamin
525 Float_t h = header->GetLegoEtaMax() + etaJet[k];
70e58892 526 accmin = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
527 }
528 areaJet[k] = rc*rc*TMath::Pi() - accmax - accmin;
529 areaOut = areaOut - areaJet[k];
530 }
531 //subtract background using area method
532 for(Int_t ljet=0; ljet<nJ; ljet++){
533 Float_t areaRatio = areaJet[ljet]/areaOut;
534 etJet[ljet] = etIn[ljet]-etOut*areaRatio; // subtraction
535 }
536
537 // estimate new total background
7d0f353c 538 Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 539 etbgTotalN = etOut*areaT/areaOut;
540
541
542}
543
544////////////////////////////////////////////////////////////////////////
545
546void AliUA1JetFinderV1::SubtractBackgStat(Int_t& nIn, Int_t&nJ,Float_t&etbgTotalN,
547 Float_t* ptT, Float_t* etaT, Float_t* phiT,
548 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
549 Int_t* multJet, Int_t* injet)
550{
551
552 //background subtraction using statistical method
7d0f353c 553 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
554 Float_t etbgStat = header->GetBackgStat(); // pre-calculated background
70e58892 555
556 //calculate energy inside
7d0f353c 557 Float_t rc= header->GetRadius();
70e58892 558 Float_t etIn[30];
559
560 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
98e98c1c 561 //if((fReader->GetCutFlag(jpart)) != 1) continue; // pt cut
70e58892 562 for(Int_t ijet=0; ijet<nJ; ijet++){
563 Float_t deta = etaT[jpart] - etaJet[ijet];
564 Float_t dphi = phiT[jpart] - phiJet[ijet];
565 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
566 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
567 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
568 if(dr <= rc){ // particles inside this cone
70e58892 569 multJet[ijet]++;
570 injet[jpart] = ijet;
98e98c1c 571 if((fReader->GetCutFlag(jpart)) == 1){ // pt cut
572 etIn[ijet]+= ptT[jpart];
573 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart];
574 }
70e58892 575 break;
576 }
577 }// end jets loop
578 } //end particle loop
579
580 //calc jets areas
581 Float_t areaJet[30];
7d0f353c 582 Float_t areaOut = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 583 for(Int_t k=0; k<nJ; k++){
584 Float_t detamax = etaJet[k] + rc;
585 Float_t detamin = etaJet[k] - rc;
586 Float_t accmax = 0.0; Float_t accmin = 0.0;
7d0f353c 587 if(detamax > header->GetLegoEtaMax()){ // sector outside etamax
588 Float_t h = header->GetLegoEtaMax() - etaJet[k];
70e58892 589 accmax = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
590 }
7d0f353c 591 if(detamin < header->GetLegoEtaMin()){ // sector outside etamin
592 Float_t h = header->GetLegoEtaMax() + etaJet[k];
70e58892 593 accmin = rc*rc*TMath::ACos(h/rc) - h*TMath::Sqrt(rc*rc - h*h);
594 }
595 areaJet[k] = rc*rc*TMath::Pi() - accmax - accmin;
596 }
597
598 //subtract background using area method
599 for(Int_t ljet=0; ljet<nJ; ljet++){
600 Float_t areaRatio = areaJet[ljet]/areaOut;
601 etJet[ljet] = etIn[ljet]-etbgStat*areaRatio; // subtraction
602 }
603
604 etbgTotalN = etbgStat;
605
606}
607
608////////////////////////////////////////////////////////////////////////
609
610void AliUA1JetFinderV1::SubtractBackgCone(Int_t& nIn, Int_t&nJ,Float_t& etbgTotalN,
611 Float_t* ptT, Float_t* etaT, Float_t* phiT,
612 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
613 Int_t* multJet, Int_t* injet)
614{
615 // Cone background subtraction method taking into acount dEt/deta distribution
7d0f353c 616 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 617 //general
7d0f353c 618 Float_t rc= header->GetRadius();
619 Float_t etamax = header->GetLegoEtaMax();
620 Float_t etamin = header->GetLegoEtaMin();
70e58892 621 Int_t ndiv = 100;
622
623 // jet energy and area arrays
624 TH1F* hEtJet[30];
625 TH1F* hAreaJet[30];
626 for(Int_t mjet=0; mjet<nJ; mjet++){
627 char hEtname[256]; char hAreaname[256];
628 sprintf(hEtname, "hEtJet%d", mjet); sprintf(hAreaname, "hAreaJet%d", mjet);
629 hEtJet[mjet] = new TH1F(hEtname,"et dist in eta ",ndiv,etamin,etamax);
630 hAreaJet[mjet] = new TH1F(hAreaname,"area dist in eta ",ndiv,etamin,etamax);
631 }
632 // background energy and area
633 TH1F* hEtBackg = new TH1F("hEtBackg"," backg et dist in eta ",ndiv,etamin,etamax);
634 TH1F* hAreaBackg = new TH1F("hAreaBackg","backg area dist in eta ",ndiv,etamin,etamax);
635
636 //fill energies
637 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
70e58892 638 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
639 Float_t deta = etaT[jpart] - etaJet[ijet];
98e98c1c 640 Float_t dphi = phiT[jpart] - phiJet[ijet];
70e58892 641 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
98e98c1c 642 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
643 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
70e58892 644 if(dr <= rc){ // particles inside this cone
70e58892 645 injet[jpart] = ijet;
98e98c1c 646 multJet[ijet]++;
647 if((fReader->GetCutFlag(jpart)) == 1){// pt cut
648 hEtJet[ijet]->Fill(etaT[jpart],ptT[jpart]); //particle inside cone
649 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart];
650 }
70e58892 651 break;
652 }
653 }// end jets loop
970a3bbc 654 if(injet[jpart] == -1 && fReader->GetCutFlag(jpart) == 1)
98e98c1c 655 hEtBackg->Fill(etaT[jpart],ptT[jpart]); // particle outside cones
70e58892 656 } //end particle loop
657
658 //calc areas
659 Float_t eta0 = etamin;
660 Float_t etaw = (etamax - etamin)/((Float_t)ndiv);
661 Float_t eta1 = eta0 + etaw;
662 for(Int_t etabin = 0; etabin< ndiv; etabin++){ // loop for all eta bins
663 Float_t etac = eta0 + etaw/2.0;
664 Float_t areabg = etaw*2.0*TMath::Pi();
665 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
666 Float_t deta0 = TMath::Abs(eta0 - etaJet[ijet]);
667 Float_t deta1 = TMath::Abs(eta1 - etaJet[ijet]);
668 Float_t acc0 = 0.0; Float_t acc1 = 0.0;
669 Float_t areaj = 0.0;
670 if(deta0 > rc && deta1 < rc){
671 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
672 areaj = acc1;
673 }
674 if(deta0 < rc && deta1 > rc){
675 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
676 areaj = acc0;
677 }
678 if(deta0 < rc && deta1 < rc){
679 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
680 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
681 if(eta1<etaJet[ijet]) areaj = acc1-acc0; // case 1
682 if((eta0 < etaJet[ijet]) && (etaJet[ijet]<eta1)) areaj = rc*rc*TMath::Pi() - acc1 -acc0; // case 2
683 if(etaJet[ijet] < eta0) areaj = acc0 -acc1; // case 3
684 }
685 hAreaJet[ijet]->Fill(etac,areaj);
686 areabg = areabg - areaj;
687 } // end jets loop
688 hAreaBackg->Fill(etac,areabg);
689 eta0 = eta1;
690 eta1 = eta1 + etaw;
691 } // end loop for all eta bins
692
693 //subtract background
694 for(Int_t kjet=0; kjet<nJ; kjet++){
695 etJet[kjet] = 0.0; // first clear etJet for this jet
696 for(Int_t bin = 0; bin< ndiv; bin++){
697 if(hAreaJet[kjet]->GetBinContent(bin)){
698 Float_t areab = hAreaBackg->GetBinContent(bin);
699 Float_t etb = hEtBackg->GetBinContent(bin);
700 Float_t areaR = (hAreaJet[kjet]->GetBinContent(bin))/areab;
701 etJet[kjet] = etJet[kjet] + ((hEtJet[kjet]->GetBinContent(bin)) - etb*areaR); //subtraction
702 }
703 }
704 }
705
706 // calc background total
707 Double_t etOut = hEtBackg->Integral();
708 Double_t areaOut = hAreaBackg->Integral();
7d0f353c 709 Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 710 etbgTotalN = etOut*areaT/areaOut;
711
712 //delete
713 for(Int_t ljet=0; ljet<nJ; ljet++){ // loop for all jets
714 delete hEtJet[ljet];
715 delete hAreaJet[ljet];
716 }
717
718 delete hEtBackg;
719 delete hAreaBackg;
720}
721
722////////////////////////////////////////////////////////////////////////
723
724
725void AliUA1JetFinderV1::SubtractBackgRatio(Int_t& nIn, Int_t&nJ,Float_t& etbgTotalN,
726 Float_t* ptT, Float_t* etaT, Float_t* phiT,
727 Float_t* etJet,Float_t* etaJet, Float_t* phiJet, Float_t* etsigJet,
728 Int_t* multJet, Int_t* injet)
729{
730 // Ratio background subtraction method taking into acount dEt/deta distribution
7d0f353c 731 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 732 //factor F calc before
7d0f353c 733 Float_t bgRatioCut = header->GetBackgCutRatio();
70e58892 734
735
736 //general
7d0f353c 737 Float_t rc= header->GetRadius();
738 Float_t etamax = header->GetLegoEtaMax();
739 Float_t etamin = header->GetLegoEtaMin();
70e58892 740 Int_t ndiv = 100;
741
742 // jet energy and area arrays
743 TH1F* hEtJet[30];
744 TH1F* hAreaJet[30];
745 for(Int_t mjet=0; mjet<nJ; mjet++){
746 char hEtname[256]; char hAreaname[256];
747 sprintf(hEtname, "hEtJet%d", mjet); sprintf(hAreaname, "hAreaJet%d", mjet);
748 hEtJet[mjet] = new TH1F(hEtname,"et dist in eta ",ndiv,etamin,etamax); // change range
749 hAreaJet[mjet] = new TH1F(hAreaname,"area dist in eta ",ndiv,etamin,etamax); // change range
750 }
751 // background energy and area
752 TH1F* hEtBackg = new TH1F("hEtBackg"," backg et dist in eta ",ndiv,etamin,etamax); // change range
753 TH1F* hAreaBackg = new TH1F("hAreaBackg","backg area dist in eta ",ndiv,etamin,etamax); // change range
754
755 //fill energies
756 for(Int_t jpart = 0; jpart < nIn; jpart++){ // loop for all particles in array
98e98c1c 757 //if((fReader->GetCutFlag(jpart)) != 1) continue;
70e58892 758 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
759 Float_t deta = etaT[jpart] - etaJet[ijet];
760 Float_t dphi = phiT[jpart] - phiJet[ijet];
761 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
762 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
763 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
764 if(dr <= rc){ // particles inside this cone
70e58892 765 multJet[ijet]++;
766 injet[jpart] = ijet;
98e98c1c 767 if((fReader->GetCutFlag(jpart)) == 1){ //pt cut
768 hEtJet[ijet]->Fill(etaT[jpart],ptT[jpart]); //particle inside cone and pt cut
769 if(fReader->GetSignalFlag(jpart) == 1) etsigJet[ijet] += ptT[jpart];
770 }
70e58892 771 break;
772 }
773 }// end jets loop
98e98c1c 774 if(injet[jpart] == -1) hEtBackg->Fill(etaT[jpart],ptT[jpart]); // particle outside cones
70e58892 775 } //end particle loop
776
777 //calc areas
778 Float_t eta0 = etamin;
779 Float_t etaw = (etamax - etamin)/((Float_t)ndiv);
780 Float_t eta1 = eta0 + etaw;
781 for(Int_t etabin = 0; etabin< ndiv; etabin++){ // loop for all eta bins
782 Float_t etac = eta0 + etaw/2.0;
783 Float_t areabg = etaw*2.0*TMath::Pi();
784 for(Int_t ijet=0; ijet<nJ; ijet++){ // loop for all jets
785 Float_t deta0 = TMath::Abs(eta0 - etaJet[ijet]);
786 Float_t deta1 = TMath::Abs(eta1 - etaJet[ijet]);
787 Float_t acc0 = 0.0; Float_t acc1 = 0.0;
788 Float_t areaj = 0.0;
789 if(deta0 > rc && deta1 < rc){
790 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
791 areaj = acc1;
792 }
793 if(deta0 < rc && deta1 > rc){
794 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
795 areaj = acc0;
796 }
797 if(deta0 < rc && deta1 < rc){
798 acc0 = rc*rc*TMath::ACos(deta0/rc) - deta0*TMath::Sqrt(rc*rc - deta0*deta0);
799 acc1 = rc*rc*TMath::ACos(deta1/rc) - deta1*TMath::Sqrt(rc*rc - deta1*deta1);
800 if(eta1<etaJet[ijet]) areaj = acc1-acc0; // case 1
801 if((eta0 < etaJet[ijet]) && (etaJet[ijet]<eta1)) areaj = rc*rc*TMath::Pi() - acc1 -acc0; // case 2
802 if(etaJet[ijet] < eta0) areaj = acc0 -acc1; // case 3
803 }
804 hAreaJet[ijet]->Fill(etac,areaj);
805 areabg = areabg - areaj;
806 } // end jets loop
807 hAreaBackg->Fill(etac,areabg);
808 eta0 = eta1;
809 eta1 = eta1 + etaw;
810 } // end loop for all eta bins
811
812 //subtract background
813 for(Int_t kjet=0; kjet<nJ; kjet++){
814 etJet[kjet] = 0.0; // first clear etJet for this jet
815 for(Int_t bin = 0; bin< ndiv; bin++){
816 if(hAreaJet[kjet]->GetBinContent(bin)){
817 Float_t areab = hAreaBackg->GetBinContent(bin);
818 Float_t etb = hEtBackg->GetBinContent(bin);
819 Float_t areaR = (hAreaJet[kjet]->GetBinContent(bin))/areab;
820 etJet[kjet] = etJet[kjet] + ((hEtJet[kjet]->GetBinContent(bin)) - etb*areaR*bgRatioCut); //subtraction
821 }
822 }
823 }
824
825 // calc background total
826 Double_t etOut = hEtBackg->Integral();
827 Double_t areaOut = hAreaBackg->Integral();
7d0f353c 828 Float_t areaT = 4*(header->GetLegoEtaMax())*TMath::Pi();
70e58892 829 etbgTotalN = etOut*areaT/areaOut;
830
831 //delete
832 for(Int_t ljet=0; ljet<nJ; ljet++){ // loop for all jets
833 delete hEtJet[ljet];
834 delete hAreaJet[ljet];
835 }
836
837 delete hEtBackg;
838 delete hAreaBackg;
839}
840
841////////////////////////////////////////////////////////////////////////
842
843
844void AliUA1JetFinderV1::Reset()
845{
846 fLego->Reset();
847 fJets->ClearJets();
ad8ada26 848 AliJetFinder::Reset();
70e58892 849}
850
851////////////////////////////////////////////////////////////////////////
852
853void AliUA1JetFinderV1::WriteJHeaderToFile()
854{
7d0f353c 855 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
7d0f353c 856 header->Write();
70e58892 857}
858
859////////////////////////////////////////////////////////////////////////
860
861void AliUA1JetFinderV1::Init()
862{
863 // initializes some variables
7d0f353c 864 AliUA1JetHeaderV1* header = (AliUA1JetHeaderV1*) fHeader;
70e58892 865 fLego = new
866 TH2F("legoH","eta-phi",
7d0f353c 867 header->GetLegoNbinEta(), header->GetLegoEtaMin(),
868 header->GetLegoEtaMax(), header->GetLegoNbinPhi(),
869 header->GetLegoPhiMin(), header->GetLegoPhiMax());
c1f55a27 870 // Do not store in current dir
871 fLego->SetDirectory(0);
9dda5307 872
70e58892 873}