3 #include "AliAnalysisTaskEMCALPi0PbPb.h"
6 #include <TClonesArray.h>
11 #include <TLorentzVector.h>
13 #include "AliAODEvent.h"
14 #include "AliAODVertex.h"
15 #include "AliAnalysisManager.h"
16 #include "AliAnalysisTaskEMCALClusterizeFast.h"
17 #include "AliCentrality.h"
18 #include "AliEMCALGeoUtils.h"
19 #include "AliESDEvent.h"
20 #include "AliESDVertex.h"
23 ClassImp(AliAnalysisTaskEMCALPi0PbPb)
25 //________________________________________________________________________
26 AliAnalysisTaskEMCALPi0PbPb::AliAnalysisTaskEMCALPi0PbPb(const char *name)
27 : AliAnalysisTaskSE(name),
62 fHClustEccentricity(0),
65 fHClustEnergySigma(0x0),
66 fHClustSigmaSigma(0x0),
67 fHClustNCellEnergyRatio(0x0),
78 DefineInput(0, TChain::Class());
79 DefineOutput(1, TList::Class());
80 fBranchNames="ESD:AliESDRun.,AliESDHeader.,PrimaryVertex.,SPDVertex.,TPCVertex.,EMCALCells. "
81 "AOD:header,vertices,emcalCells";
84 //________________________________________________________________________
85 AliAnalysisTaskEMCALPi0PbPb::~AliAnalysisTaskEMCALPi0PbPb()
89 delete fOutput; fOutput = 0;
90 delete fPtRanges; fPtRanges = 0;
91 delete fGeom; fGeom = 0;
97 //________________________________________________________________________
98 void AliAnalysisTaskEMCALPi0PbPb::UserCreateOutputObjects()
100 // Create user objects here.
102 fOutput = new TList();
106 TFile *f = OpenFile(1);
108 fNtuple = new TNtuple(Form("nt%.0fto%.0f",fCentFrom,fCentTo),"nt",
109 "run:evt:cent:pt:e:emax:n:db:disp:mn:ms:chi:cpv:ecc:sig:eta:phi");
113 TH1::SetDefaultSumw2(kTRUE);
114 TH2::SetDefaultSumw2(kTRUE);
115 fHCuts = new TH1F("hEventCuts","",4,0.5,4.5);
116 fHCuts->GetXaxis()->SetBinLabel(1,"All (PS)");
117 fHCuts->GetXaxis()->SetBinLabel(2,Form("%s: %.0f-%.0f",fCentVar.Data(),fCentFrom,fCentTo));
118 fHCuts->GetXaxis()->SetBinLabel(3,"QFlag");
119 fHCuts->GetXaxis()->SetBinLabel(4,Form("zvtx: %.0f-%.0f",fVtxZMin,fVtxZMax));
120 fOutput->Add(fHCuts);
121 fHVertexZ = new TH1F("hVertexZBeforeCut","",100,-25,25);
122 fHVertexZ->SetXTitle("z [cm]");
123 fOutput->Add(fHVertexZ);
124 fHVertexZ2 = new TH1F("hVertexZAfterCut","",100,-25,25);
125 fHVertexZ2->SetXTitle("z [cm]");
126 fOutput->Add(fHVertexZ2);
127 fHCent = new TH1F("hCentBeforeCut","",101,-1,100);
128 fHCent->SetXTitle(fCentVar.Data());
129 fOutput->Add(fHCent);
130 fHCentQual = new TH1F("hCentAfterCut","",101,-1,100);
131 fHCentQual->SetXTitle(fCentVar.Data());
132 fOutput->Add(fHCentQual);
134 // histograms for cells
135 fHColuRow = new TH2F*[4];
136 fHColuRowE = new TH2F*[4];
137 fHCellMult = new TH1F*[4];
138 for (Int_t i = 0; i<4; ++i) {
139 fHColuRow[i] = new TH2F(Form("hColRow_Mod%d",i),"",49,0,49,25,0,25);
140 fHColuRow[i]->SetTitle(Form("Module %d: Occupancy", i));
141 fHColuRow[i]->SetXTitle("col (i#eta)");
142 fHColuRow[i]->SetYTitle("row (i#phi)");
143 fHColuRowE[i] = new TH2F(Form("hColRowE_Mod%d", i),"",49,0,49,25,0,25);
144 fHColuRowE[i]->SetTitle(Form("Module %d: Cell energy",i));
145 fHColuRowE[i]->SetXTitle("col (i#eta)");
146 fHColuRowE[i]->SetYTitle("row (i#phi)");
147 fHCellMult[i] = new TH1F(Form("hCellMult_Mod%d",i),"",1000,0,1000);
148 fHCellMult[i]->SetTitle(Form("Module %d: Cell multiplicity",i));
149 fHCellMult[i]->SetXTitle("# of cells");
150 fOutput->Add(fHColuRow[i]);
151 fOutput->Add(fHColuRowE[i]);
152 fOutput->Add(fHCellMult[i]);
154 fHCellE = new TH1F("hCellE","",150,0.,15.);
155 fHCellE->SetXTitle("E_{cell} [GeV]");
156 fOutput->Add(fHCellE);
157 fHCellH = new TH1F ("fHCellHighestE","",150,0.,15.);
158 fHCellH->SetXTitle("E^{max}_{cell} [GeV]");
159 fOutput->Add(fHCellH);
160 fHCellM = new TH1F ("fHCellMeanEperHitCell","",250,0.,2.5);
161 fHCellM->SetXTitle("#LT E_{cell}#GT [GeV]");
162 fOutput->Add(fHCellM);
163 fHCellM2 = new TH1F ("fHCellMeanEperAllCells","",250,0.,1);
164 fHCellM2->SetXTitle("1/N_{cells} #Sum E_{cell} [GeV]");
165 fOutput->Add(fHCellM2);
167 // histograms for clusters
168 fHClustEccentricity = new TH1F("hClustEccentricity","",100,-0.1,1.1);
169 fHClustEccentricity->SetXTitle("#epsilon_{C}");
170 fOutput->Add(fHClustEccentricity);
171 fHClustEtaPhi = new TH2F("hClustEtaPhi","",500,-0.8,0.8,500,1.2,2.2);
172 fHClustEtaPhi->SetXTitle("#eta");
173 fHClustEtaPhi->SetYTitle("#varphi");
174 fOutput->Add(fHClustEtaPhi);
175 fHClustEnergyPt = new TH2F("hClustEnergyPt","",250,0,50,250,0,50);
176 fHClustEnergyPt->SetXTitle("E [GeV]");
177 fHClustEnergyPt->SetYTitle("p_{T} [GeV/c]");
178 fOutput->Add(fHClustEnergyPt);
179 fHClustEnergySigma = new TH2F("hClustEnergySigma","",100,0,100,500,0,50);
180 fHClustEnergySigma->SetXTitle("E_{C} * #sigma_{max} [GeV*cm]");
181 fHClustEnergySigma->SetYTitle("E_{C} [GeV]");
182 fOutput->Add(fHClustEnergySigma);
183 fHClustSigmaSigma = new TH2F("hClustSigmaSigma","",500,0,50,500,0,50);
184 fHClustSigmaSigma->SetXTitle("#lambda_{0} [cm]");
185 fHClustSigmaSigma->SetYTitle("#sigma_{max} [cm]");
186 fOutput->Add(fHClustSigmaSigma);
187 fHClustNCellEnergyRatio = new TH2F("hClustNCellEnergyRatio","",27,-0.5,26.5,101,-0.05,1.05);
188 fHClustNCellEnergyRatio->SetXTitle("N_{cells}");
189 fHClustNCellEnergyRatio->SetYTitle("E^{max}_{cell}/E_{clus}");
190 fOutput->Add(fHClustNCellEnergyRatio);
192 // histograms for pion candidates
193 fHPionEtaPhi = new TH2F("hPionEtaPhi","",100,-0.8,0.8,100,1.2,2.2);
194 fHPionEtaPhi->SetXTitle("#eta_{#gamma#gamma}");
195 fHPionEtaPhi->SetYTitle("#varphi_{#gamma#gamma}");
196 fOutput->Add(fHPionEtaPhi);
197 fHPionMggPt = new TH2F("hPionMggPt","",1000,0,2,100,0,20.0);
198 fHPionMggPt->SetXTitle("M_{#gamma#gamma} [GeV/c^{2}]");
199 fHPionMggPt->SetYTitle("p_{T}^{#gamma#gamma} [GeV/c]");
200 fOutput->Add(fHPionMggPt);
201 fHPionMggAsym = new TH2F("hPionMggAsym","",1000,0,2,100,0,1);
202 fHPionMggAsym->SetXTitle("M_{#gamma#gamma} [GeV/c^{2}]");
203 fHPionMggAsym->SetYTitle("Z_{#gamma#gamma} [GeV]");
204 fOutput->Add(fHPionMggAsym);
205 fHPionMggDgg = new TH2F("hPionMggDgg","",1000,0,2,100,0,10);
206 fHPionMggDgg->SetXTitle("M_{#gamma#gamma} [GeV/c^{2}]");
207 fHPionMggDgg->SetYTitle("opening angle [grad]");
208 fOutput->Add(fHPionMggDgg);
209 const Int_t nbins = 19;
210 Double_t xbins[nbins] = {0.5,1,1.5,2,2.5,3,3.5,4,4.5,6,7,8,9,10,12.5,15,20,25,50};
211 fPtRanges = new TAxis(nbins-1,xbins);
212 for (Int_t i = 0; i<=nbins; ++i) {
213 fHPionInvMasses[i] = new TH1F(Form("hPionInvMass%d",i),"",1000,0,2);
214 fHPionInvMasses[i]->SetXTitle("M_{#gamma#gamma} [GeV/c^{2}]");
216 fHPionInvMasses[i]->SetTitle(Form("0 < p_{T}^{#gamma#gamma} <%.1f",xbins[0]));
218 fHPionInvMasses[i]->SetTitle(Form("p_{T}^{#gamma#gamma} > 50"));
220 fHPionInvMasses[i]->SetTitle(Form("%.1f < p_{T}^{#gamma#gamma} <%.1f",xbins[i-1],xbins[i]));
221 fOutput->Add(fHPionInvMasses[i]);
224 PostData(1, fOutput);
227 //________________________________________________________________________
228 void AliAnalysisTaskEMCALPi0PbPb::UserExec(Option_t *)
230 // Called for each event.
235 AliAnalysisManager *am = AliAnalysisManager::GetAnalysisManager();
236 fEsdEv = dynamic_cast<AliESDEvent*>(InputEvent());
238 am->LoadBranch("AliESDRun.");
239 am->LoadBranch("AliESDHeader.");
241 fAodEv = dynamic_cast<AliAODEvent*>(InputEvent());
242 am->LoadBranch("header");
245 if (!fGeom) { // set misalignment matrices (stored in first event)
246 fGeom = new AliEMCALGeoUtils("EMCAL_FIRSTYEARV1","EMCAL");
248 for (Int_t i=0; i<4; ++i)
249 fGeom->SetMisalMatrix(fEsdEv->GetESDRun()->GetEMCALMatrix(i),i);
251 for (Int_t i=0; i<4; ++i)
252 fGeom->SetMisalMatrix(fAodEv->GetHeader()->GetEMCALMatrix(i),i);
254 fGeom->GetEMCGeometry();
260 const AliCentrality *centP = InputEvent()->GetCentrality();
261 Double_t cent = centP->GetCentralityPercentileUnchecked(fCentVar);
263 if (cent<fCentFrom||cent>fCentTo)
269 if (centP->GetQuality()>0)
273 fHCentQual->Fill(cent);
277 am->LoadBranch("PrimaryVertex.");
278 am->LoadBranch("SPDVertex.");
279 am->LoadBranch("TPCVertex.");
281 fAodEv = dynamic_cast<AliAODEvent*>(InputEvent());
282 am->LoadBranch("vertices");
285 const AliVVertex *vertex = InputEvent()->GetPrimaryVertex();
289 fHVertexZ->Fill(vertex->GetZ());
291 if(vertex->GetZ()<fVtxZMin||vertex->GetZ()>fVtxZMax)
295 fHVertexZ2->Fill(vertex->GetZ());
297 fRecPoints = 0; // will be set if fClusName is given and AliAnalysisTaskEMCALClusterizeFast is used
298 fEsdClusters = 0; // will be set if ESD input used and if fRecPoints are not set of if clusters are attached
299 fEsdCells = 0; // will be set if ESD input used
300 fAodClusters = 0; // will be set if AOD input used and if fRecPoints are not set of if clusters are attached
301 // or if fClusName is given and AliAnalysisTaskEMCALClusterizeFast in AOD output mode
302 fAodCells = 0; // will be set if AOD input used
304 // deal with special output from AliAnalysisTaskEMCALClusterizeFast first
305 Bool_t clusattached = 0;
306 Bool_t recalibrated = 0;
307 if (1 && !fClusName.IsNull()) {
308 AliAnalysisTaskEMCALClusterizeFast *cltask = 0;
309 TObjArray *ts = am->GetTasks();
310 cltask = dynamic_cast<AliAnalysisTaskEMCALClusterizeFast*>(ts->FindObject(fClusName));
311 if (cltask && cltask->GetClusters()) {
312 fRecPoints = const_cast<TObjArray*>(cltask->GetClusters());
313 clusattached = cltask->GetAttachClusters();
314 if (cltask->GetCalibData()!=0)
315 recalibrated = kTRUE;
318 if (1 && AODEvent() && !fClusName.IsNull()) {
319 TList *l = AODEvent()->GetList();
320 TClonesArray *clus = 0;
322 clus = dynamic_cast<TClonesArray*>(l->FindObject(fClusName));
327 if (fEsdEv) { // ESD input mode
328 if (1 && (!fRecPoints||clusattached)) {
330 am->LoadBranch("CaloClusters");
331 TList *l = fEsdEv->GetList();
332 TClonesArray *clus = 0;
334 clus = dynamic_cast<TClonesArray*>(l->FindObject("CaloClusters"));
340 am->LoadBranch("EMCALCells.");
341 fEsdCells = fEsdEv->GetEMCALCells();
343 } else if (fAodEv) { // AOD input mode
344 if (1 && (!fAodClusters || clusattached)) {
346 am->LoadBranch("caloClusters");
347 TList *l = fAodEv->GetList();
348 TClonesArray *clus = 0;
350 clus = dynamic_cast<TClonesArray*>(l->FindObject("caloClusters"));
356 am->LoadBranch("emcalCells");
357 fAodCells = fAodEv->GetEMCALCells();
360 AliFatal("Impossible to not have either pointer to ESD or AOD event");
364 AliDebug(2,Form("fRecPoints set: %p", fRecPoints));
365 AliDebug(2,Form("fEsdClusters set: %p", fEsdClusters));
366 AliDebug(2,Form("fEsdCells set: %p", fEsdCells));
367 AliDebug(2,Form("fAodClusters set: %p", fAodClusters));
368 AliDebug(2,Form("fAodCells set: %p", fAodCells));
372 ClusterAfterburner();
378 PostData(1, fOutput);
381 //________________________________________________________________________
382 void AliAnalysisTaskEMCALPi0PbPb::Terminate(Option_t *)
384 // Terminate called at the end of analysis.
387 TFile *f = OpenFile(1);
393 //________________________________________________________________________
394 void AliAnalysisTaskEMCALPi0PbPb::FillCellHists()
396 // Fill histograms related to cell properties.
398 AliVCaloCells *cells = fEsdCells;
403 Int_t cellModCount[4] = {0,0,0,0};
404 Double_t cellMaxE = 0;
405 Double_t cellMeanE = 0;
406 Int_t ncells = cells->GetNumberOfCells();
410 for (Int_t i = 0; i<ncells; ++i ) {
411 Int_t absID = cells->GetCellNumber(i);
412 Double_t cellE = cells->GetAmplitude(i);
413 fHCellE->Fill(cellE);
418 Int_t iSM=-1, iTower=-1, nIphi=-1, nIeta=-1;
419 Bool_t ret = fGeom->GetCellIndex(absID, iSM, iTower, nIphi, nIeta);
421 AliError(Form("Could not get cell index for %d", absID));
425 Int_t iPhi=-1, iEta=-1;
426 fGeom->GetCellPhiEtaIndexInSModule(iSM, iTower, nIphi, nIeta, iPhi, iEta);
427 fHColuRow[iSM]->Fill(iEta,iPhi,1);
428 fHColuRowE[iSM]->Fill(iEta,iPhi,cellE);
430 fHCellH->Fill(cellMaxE);
432 fHCellM->Fill(cellMeanE);
433 fHCellM2->Fill(cellMeanE*ncells/24/48/4); //hard-coded but there is a way to figure out from geometry
434 for (Int_t i=0; i<4; ++i)
435 fHCellMult[i]->Fill(cellModCount[i]);
439 //________________________________________________________________________
440 void AliAnalysisTaskEMCALPi0PbPb::FillClusHists()
442 // Fill histograms related to cluster properties.
443 Double_t clusterEcc = 0;
446 Double_t vertex[3] = {0,0,0};
447 InputEvent()->GetPrimaryVertex()->GetXYZ(vertex);
449 TObjArray *clusters = fEsdClusters;
451 clusters = fAodClusters;
454 TLorentzVector clusterVec;
455 Int_t nclus = clusters->GetEntries();
456 for(Int_t i = 0; i<nclus; ++i) {
457 AliVCluster *clus = static_cast<AliVCluster*>(clusters->At(i));
460 if (!clus->IsEMCAL())
462 clus->GetMomentum(clusterVec,vertex);
463 Double_t maxAxis = 0, minAxis = 0;
464 GetSigma(clus,maxAxis,minAxis);
466 clusterEcc = TMath::Sqrt(1.0 - minAxis*minAxis/(maxAxis*maxAxis));
468 fHClustEccentricity->Fill(clusterEcc);
469 fHClustEtaPhi->Fill(clusterVec.Eta(),clusterVec.Phi());
470 fHClustEnergyPt->Fill(clusterVec.E(),clusterVec.Pt());
471 fHClustEnergySigma->Fill(clus->E()*maxAxis,clus->E());
472 fHClustSigmaSigma->Fill(max(clus->GetM02(),clus->GetM20()),clus->E()*maxAxis);
473 fHClustNCellEnergyRatio->Fill(clus->GetNCells(),GetMaxCellEnergy(clus)/clus->E());
476 vals[0] = InputEvent()->GetRunNumber();
477 vals[1] = (((UInt_t)InputEvent()->GetOrbitNumber() << 12) | (UInt_t)InputEvent()->GetBunchCrossNumber());
478 vals[2] = InputEvent()->GetCentrality()->GetCentralityPercentileUnchecked(fCentVar);
479 vals[3] = clusterVec.Pt();
480 vals[4] = clusterVec.E();
481 vals[5] = GetMaxCellEnergy(clus);
482 vals[6] = clus->GetNCells();
483 vals[7] = clus->GetDistanceToBadChannel();
484 vals[8] = clus->GetDispersion();
485 vals[9] = clus->GetM20();
486 vals[10] = clus->GetM02();
487 vals[11] = clus->Chi2();
488 vals[12] = clus->GetEmcCpvDistance();
489 vals[13] = clusterEcc;
490 vals[14] = GetMaxCellEnergy(clus)/clus->E();
492 vals[16] = clusterVec.Eta();
493 vals[17] = clusterVec.Phi();
500 //________________________________________________________________________
501 void AliAnalysisTaskEMCALPi0PbPb::FillPionHists()
503 // Fill histograms related to pions.
505 Double_t vertex[3] = {0,0,0};
506 InputEvent()->GetPrimaryVertex()->GetXYZ(vertex);
508 TObjArray *clusters = fEsdClusters;
510 clusters = fAodClusters;
513 TLorentzVector clusterVec1;
514 TLorentzVector clusterVec2;
515 TLorentzVector pionVec;
517 Int_t nclus = clusters->GetEntries();
518 for (Int_t i = 0; i<nclus; ++i) {
519 AliVCluster *clus1 = static_cast<AliVCluster*>(clusters->At(i));
522 if (!clus1->IsEMCAL())
524 if (clus1->E()<0.010)
526 if (clus1->GetNCells()<fNminCells)
528 clus1->GetMomentum(clusterVec1,vertex);
529 for (Int_t j = i+1; j<nclus; ++j) {
530 AliVCluster *clus2 = static_cast<AliVCluster*>(clusters->At(j));
533 if (!clus2->IsEMCAL())
535 if (clus2->E()<0.010)
537 if (clus2->GetNCells()<fNminCells)
539 clus2->GetMomentum(clusterVec2,vertex);
540 pionVec = clusterVec1 + clusterVec2;
541 Double_t pionZgg = TMath::Abs(clusterVec1.E()-clusterVec2.E())/pionVec.E();
542 Double_t pionOpeningAngle = clusterVec1.Angle(clusterVec2.Vect());
543 if (pionZgg < fAsymMax) {
544 fHPionEtaPhi->Fill(pionVec.Eta(),pionVec.Phi());
545 fHPionMggPt->Fill(pionVec.M(),pionVec.Pt());
546 fHPionMggAsym->Fill(pionVec.M(),pionZgg);
547 fHPionMggDgg->Fill(pionVec.M(),pionOpeningAngle);
548 Int_t bin = fPtRanges->FindBin(pionVec.Pt());
549 fHPionInvMasses[bin]->Fill(pionVec.M());
556 //________________________________________________________________________
557 void AliAnalysisTaskEMCALPi0PbPb::ClusterAfterburner()
561 AliVCaloCells *cells = fEsdCells;
568 Int_t ncells = cells->GetNumberOfCells();
572 Double_t cellMeanE = 0, cellSigE = 0;
573 for (Int_t i = 0; i<ncells; ++i ) {
574 Double_t cellE = cells->GetAmplitude(i);
576 cellSigE += cellE*cellE;
580 cellSigE -= cellMeanE*cellMeanE;
583 cellSigE = TMath::Sqrt(cellSigE / ncells);
585 Double_t subE = cellMeanE - 7*cellSigE;
589 for (Int_t i = 0; i<ncells; ++i) {
591 Double_t amp=0,time=0;
592 if (!cells->GetCell(i, id, amp, time))
597 cells->SetCell(i, id, amp, time);
600 TObjArray *clusters = fEsdClusters;
602 clusters = fAodClusters;
607 Int_t nclus = clusters->GetEntries();
608 for (Int_t i = 0; i<nclus; ++i) {
609 AliVCluster *clus = static_cast<AliVCluster*>(clusters->At(i));
610 Int_t nc = clus->GetNCells();
611 Double_t oldE = clus->E();
614 UShort_t ids[100] = {0};
615 Double_t fra[100] = {0};
616 for (Int_t j = 0; j<nc; ++j) {
617 Short_t id = clus->GetCellAbsId(j);
618 Double_t cen = cells->GetCellAmplitude(id);
626 clusters->RemoveAt(i);
629 for (Int_t j = 0; j<nc2; ++j) {
631 Double_t cen = cells->GetCellAmplitude(id);
635 AliAODCaloCluster *aodclus = dynamic_cast<AliAODCaloCluster*>(clus);
638 aodclus->SetNCells(nc2);
639 aodclus->SetCellsAmplitudeFraction(fra);
640 aodclus->SetCellsAbsId(ids);
642 cout << i << " " << clusE << " " << oldE << endl;
645 clusters->Compress();
648 // virtual void AddAt(TObject *obj, Int_t idx);
649 // virtual TObject *RemoveAt(Int_t idx);
651 //________________________________________________________________________
652 Double_t AliAnalysisTaskEMCALPi0PbPb::GetMaxCellEnergy(AliVCluster *cluster)
654 // Get maximum energy of attached cell.
657 Int_t ncells = cluster->GetNCells();
659 for (Int_t i=0; i<ncells; i++) {
660 Double_t e = fEsdCells->GetCellAmplitude(cluster->GetCellAbsId(i));
665 for (Int_t i=0; i<ncells; i++) {
666 Double_t e = fAodCells->GetCellAmplitude(cluster->GetCellAbsId(i));
674 //________________________________________________________________________
675 void AliAnalysisTaskEMCALPi0PbPb::GetSigma(AliVCluster *cluster, Double_t& sigmaMax, Double_t &sigmaMin)
677 // Calculate the (E) weighted variance along the longer (eigen) axis.
679 sigmaMax = 0; // cluster variance along its longer axis
680 sigmaMin = 0; // cluster variance along its shorter axis
681 Double_t Ec = cluster->E(); // cluster energy
682 Double_t Xc = 0 ; // cluster first moment along X
683 Double_t Yc = 0 ; // cluster first moment along Y
684 Double_t Sxx = 0 ; // cluster second central moment along X (variance_X^2)
685 Double_t Sxy = 0 ; // cluster second central moment along Y (variance_Y^2)
686 Double_t Syy = 0 ; // cluster covariance^2
688 AliVCaloCells *cells = fEsdCells;
695 Int_t ncells = cluster->GetNCells();
700 for(Int_t j=0; j<ncells; ++j) {
701 fGeom->GetGlobal(cluster->GetCellAbsId(j),pos);
702 Int_t id = cluster->GetCellAbsId(j);
703 Double_t cellen = cells->GetCellAmplitude(id);
704 Xc += cellen*pos.X();
705 Yc += cellen*pos.Y();
706 Sxx += cellen*pos.X()*pos.X();
707 Syy += cellen*pos.Y()*pos.Y();
708 Sxy += cellen*pos.X()*pos.Y();
718 sigmaMax = (Sxx + Syy + TMath::Sqrt((Sxx-Syy)*(Sxx-Syy)+4.0*Sxy*Sxy))/2.0;
719 sigmaMax = TMath::Sqrt(sigmaMax);
720 sigmaMin = TMath::Abs(Sxx + Syy - TMath::Sqrt((Sxx-Syy)*(Sxx-Syy)+4.0*Sxy*Sxy))/2.0;
721 sigmaMin = TMath::Sqrt(sigmaMin);