1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 This class provides the calibration of the time dependence of the TPC gain due to pressure and temperature changes etc.
21 //0. Libraries to load
22 gSystem->Load("libANALYSIS");
23 gSystem->Load("libSTAT");
24 gSystem->Load("libTPCcalib");
27 //1. Do calibration ...
32 //2. Visualize results
34 TFile fcalib("CalibObjects.root");
35 TObjArray * array = (TObjArray*)fcalib.Get("TPCCalib");
36 AliTPCcalibTimeGain * gain = ( AliTPCcalibTimeGain *)array->FindObject("calibTimeGain");
37 TGraphErrors * gr = gain->GetGraphGainVsTime(0,1000)
39 // gain->GetHistGainTime()->GetAxis(1)->SetRangeUser(1213.8e6,1214.3e6)
40 TH2D * GainTime = gain->GetHistGainTime()->Projection(0,1)
41 GainTime->GetXaxis()->SetTimeDisplay(kTRUE)
42 GainTime->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}")
43 GainTime->Draw("colz")
46 // MakeSlineFit example
48 AliSplineFit *fit = AliTPCcalibTimeGain::MakeSplineFit(gr)
50 TGraph * grfit = fit.MakeGraph(gr->GetX()[0],gr->GetX()[gr->GetN()-1],50000,0);
52 gr->SetMarkerStyle(25);
54 grfit->SetLineColor(2);
58 // QA - dE/dx resoultion as a function of time
61 TGraph * grSigma = AliTPCcalibBase::FitSlicesSigma(gain->GetHistGainTime(),0,1,1800,5)
63 TCanvas *c1 = new TCanvas("c1","transparent pad",200,10,700,500);
64 TPad *pad1 = new TPad("pad1","",0,0,1,1);
65 TPad *pad2 = new TPad("pad2","",0,0,1,1);
66 pad2->SetFillStyle(4000); //will be transparent
70 GainTime->Draw("colz")
76 Double_t ymin = -0.04;
78 Double_t dy = (ymax-ymin)/0.8;
79 Double_t xmin = GainTime->GetXaxis()->GetXmin()
80 Double_t xmax = GainTime->GetXaxis()->GetXmax()
81 Double_t dx = (xmax-xmin)/0.8; //10 per cent margins left and right
82 pad2->Range(xmin-0.1*dx,ymin-0.1*dy,xmax+0.1*dx,ymax+0.1*dy);
85 grSigma->SetLineColor(2);
86 grSigma->SetLineWidth(2);
88 TGaxis *axis = new TGaxis(xmax,ymin,xmax,ymax,ymin,ymax,50510,"+L");
89 axis->SetLabelColor(kRed);
90 axis->SetTitle("dE/dx resolution #sigma_{dE/dx}");
93 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
95 ----> make Attachment study
97 TFile fcalib("CalibObjects40366b.root");
98 TObjArray * array = (TObjArray*)fcalib.Get("TPCCalib");
99 AliTPCcalibTimeGain * gain = ( AliTPCcalibTimeGain *)array->FindObject("calibTimeGain");
100 TGraphErrors * grAttach = gain->GetGraphAttachment(2000,4)
102 TCanvas *c1 = new TCanvas("c1","transparent pad",200,10,700,500);
103 TPad *pad1 = new TPad("pad1","",0,0,1,1);
104 TPad *pad2 = new TPad("pad2","",0,0,1,1);
105 pad2->SetFillStyle(4000); //will be transparent
109 gain->GetHistGainTime()->GetAxis(1)->SetRangeUser(1213.8e6,1214.3e6)
110 TH2D * GainTime = gain->GetHistGainTime()->Projection(0,1)
111 GainTime->GetXaxis()->SetTimeDisplay(kTRUE)
112 GainTime->GetXaxis()->SetTimeFormat("#splitline{%d/%m}{%H:%M}")
113 GainTime->Draw("colz")
117 Double_t ymin = -0.001;
118 Double_t ymax = 0.001;
119 Double_t dy = (ymax-ymin)/0.8;
120 Double_t xmin = GainTime->GetXaxis()->GetXmin()
121 Double_t xmax = GainTime->GetXaxis()->GetXmax()
122 Double_t dx = (xmax-xmin)/0.8; //10 per cent margins left and right
123 pad2->Range(xmin-0.1*dx,ymin-0.1*dy,xmax+0.1*dx,ymax+0.1*dy);
126 grAttach->SetLineColor(2);
127 grAttach->SetLineWidth(2);
129 TGaxis *axis = new TGaxis(xmax,ymin,xmax,ymax,ymin,ymax,50510,"+L");
130 axis->SetLabelColor(kRed);
131 axis->SetTitle("attachment coefficient b");
138 #include "Riostream.h"
144 #include "THnSparse.h"
145 #include "TGraphErrors.h"
151 #include "TVectorD.h"
152 #include "TProfile.h"
153 #include "TGraphErrors.h"
156 #include "AliTPCclusterMI.h"
157 #include "AliTPCseed.h"
158 #include "AliESDVertex.h"
159 #include "AliESDEvent.h"
160 #include "AliESDfriend.h"
161 #include "AliESDInputHandler.h"
162 #include "AliAnalysisManager.h"
164 #include "AliTracker.h"
166 #include "AliTPCCalROC.h"
167 #include "AliESDv0.h"
171 #include "AliTPCcalibTimeGain.h"
173 #include "TTreeStream.h"
174 #include "AliTPCTracklet.h"
175 #include "TTimeStamp.h"
176 #include "AliTPCcalibDB.h"
177 #include "AliTPCcalibLaser.h"
178 #include "AliDCSSensorArray.h"
179 #include "AliDCSSensor.h"
181 ClassImp(AliTPCcalibTimeGain)
183 Double_t AliTPCcalibTimeGain::fgMergeEntriesCut=10000000.;
185 AliTPCcalibTimeGain::AliTPCcalibTimeGain()
190 fIntegrationTimeDeDx(0),
194 fCutRequireITSrefit(0),
203 fUseCookAnalytical(0),
205 fLowMemoryConsumption(0)
208 // Default constructor
210 AliDebug(5,"Default Constructor");
214 AliTPCcalibTimeGain::AliTPCcalibTimeGain(const Text_t *name, const Text_t *title, UInt_t StartTime, UInt_t EndTime, Int_t deltaIntegrationTimeGain)
219 fIntegrationTimeDeDx(0),
223 fCutRequireITSrefit(0),
232 fUseCookAnalytical(0),
234 fLowMemoryConsumption(0)
237 // No default constructor
242 AliDebug(5,"Non Default Constructor");
244 fIntegrationTimeDeDx = deltaIntegrationTimeGain;
246 Double_t deltaTime = EndTime - StartTime;
249 // main histogram for time dependence: dE/dx, time, type (1-muon cosmic,2-pion beam data, 3&4 - proton points at higher dE/dx), meanDriftlength, momenta (only filled if enough space is available), run number, eta
250 Int_t timeBins = TMath::Nint(deltaTime/deltaIntegrationTimeGain);
251 Int_t binsGainTime[7] = {150, timeBins, 4, 25, 200, 10000000, 20};
252 Double_t xminGainTime[7] = {0.5, StartTime, 0.5, 0, 0.1, -0.5, -1};
253 Double_t xmaxGainTime[7] = { 8, EndTime, 4.5, 250, 50, 9999999.5, 1};
254 fHistGainTime = new THnSparseF("HistGainTime","dEdx time dep.;dEdx,time,type,driftlength,momenta,run number, eta;dEdx",7,binsGainTime,xminGainTime,xmaxGainTime);
255 BinLogX(fHistGainTime, 4);
257 fHistDeDxTotal = new TH2F("DeDx","dEdx; momentum p (GeV); TPC signal (a.u.)",250,0.01,100.,1000,0.,8);
258 BinLogX(fHistDeDxTotal);
261 // default track selection cuts
264 fCutRequireITSrefit = kFALSE;
268 // default values for dE/dx
273 fUseShapeNorm = kTRUE;
274 fUsePosNorm = kFALSE;
275 fUsePadNorm = kFALSE;
276 fUseCookAnalytical = kFALSE;
279 fLowMemoryConsumption = kTRUE;
286 AliTPCcalibTimeGain::~AliTPCcalibTimeGain(){
290 delete fHistGainTime;
292 delete fHistDeDxTotal;
296 void AliTPCcalibTimeGain::Process(AliESDEvent *event) {
301 Printf("ERROR: ESD not available");
304 AliESDfriend *ESDfriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
308 if (ESDfriend->TestSkipBit()) return;
310 if (fIsCosmic) { // this should be removed at some point based on trigger mask !?
311 ProcessCosmicEvent(event);
313 ProcessBeamEvent(event);
322 void AliTPCcalibTimeGain::ProcessCosmicEvent(AliESDEvent *event) {
324 // Process in case of cosmic event
326 AliESDfriend *esdFriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
328 Printf("ERROR: ESDfriend not available");
332 UInt_t time = event->GetTimeStamp();
333 Int_t nFriendTracks = esdFriend->GetNumberOfTracks();
334 Int_t runNumber = event->GetRunNumber();
338 for (Int_t i=0;i<nFriendTracks;++i) {
340 AliESDtrack *track = event->GetTrack(i);
341 if (!track) continue;
342 AliESDfriendTrack *friendTrack = esdFriend->GetTrack(i);
343 if (!friendTrack) continue;
344 const AliExternalTrackParam * trackIn = track->GetInnerParam();
345 const AliExternalTrackParam * trackOut = friendTrack->GetTPCOut();
346 if (!trackIn) continue;
347 if (!trackOut) continue;
349 // calculate necessary track parameters
350 Double_t meanP = trackIn->GetP();
351 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackIn->GetZ() + trackOut->GetZ());
352 Int_t nclsDeDx = track->GetTPCNcls();
354 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
355 if (nclsDeDx < 60) continue;
356 if (TMath::Abs(trackIn->GetTgl()) > 1) continue;
357 if (TMath::Abs(trackIn->GetSnp()) > 0.6) continue;
360 TObject *calibObject;
361 AliTPCseed *seed = 0;
362 for (Int_t l=0;(calibObject=friendTrack->GetCalibObject(l));++l) {
363 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
367 Double_t tpcSignal = GetTPCdEdx(seed);
368 if (nclsDeDx > 100) fHistDeDxTotal->Fill(meanP, tpcSignal);
370 if (fLowMemoryConsumption) {
371 if (meanP < 20) continue;
372 meanP = 30; // set all momenta to one in order to save memory
374 //dE/dx, time, type (1-muon cosmic,2-pion beam data), momenta
375 Double_t vec[6] = {tpcSignal,time,1,meanDrift,meanP,runNumber};
376 fHistGainTime->Fill(vec);
385 void AliTPCcalibTimeGain::ProcessBeamEvent(AliESDEvent *event) {
387 // Process in case of beam event
389 AliESDfriend *esdFriend=static_cast<AliESDfriend*>(event->FindListObject("AliESDfriend"));
391 Printf("ERROR: ESDfriend not available");
395 UInt_t time = event->GetTimeStamp();
396 Int_t nFriendTracks = esdFriend->GetNumberOfTracks();
397 Int_t runNumber = event->GetRunNumber();
401 for (Int_t i=0;i<nFriendTracks;++i) { // begin track loop
403 AliESDtrack *track = event->GetTrack(i);
404 if (!track) continue;
405 AliESDfriendTrack *friendTrack = esdFriend->GetTrack(i);
406 if (!friendTrack) continue;
408 const AliExternalTrackParam * trackIn = track->GetInnerParam();
409 const AliExternalTrackParam * trackOut = friendTrack->GetTPCOut();
410 if (!trackIn) continue;
411 if (!trackOut) continue;
413 // calculate necessary track parameters
414 Double_t meanP = trackIn->GetP();
415 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackIn->GetZ() + trackOut->GetZ());
416 Int_t nCrossedRows = track->GetTPCCrossedRows();
419 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
420 // fCutCrossRows = 80, fCutEtaWindow = 0.8, fCutRequireITSrefit, fCutMaxDcaXY = 3.5, fCutMaxDcaZ = 25
422 if (nCrossedRows < fCutCrossRows) continue;
423 if (TMath::Abs(trackIn->Eta()) > fCutEtaWindow) continue;
425 UInt_t status = track->GetStatus();
426 if ((status&AliESDtrack::kTPCrefit)==0) continue;
427 if ((status&AliESDtrack::kITSrefit)==0 && fCutRequireITSrefit) continue; // ITS cluster
429 Float_t dca[2], cov[3];
430 track->GetImpactParameters(dca,cov);
431 if (TMath::Abs(dca[0]) > fCutMaxDcaXY || TMath::Abs(dca[0]) < 0.0000001) continue; // cut in xy
432 if (((status&AliESDtrack::kITSrefit) == 1 && TMath::Abs(dca[1]) > 3.) || TMath::Abs(dca[1]) > fCutMaxDcaZ ) continue;
434 Double_t eta = trackIn->Eta();
437 TObject *calibObject;
438 AliTPCseed *seed = 0;
439 for (Int_t l=0;(calibObject=friendTrack->GetCalibObject(l));++l) {
440 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
444 Int_t particleCase = 0;
445 if (meanP < 0.55 && meanP > 0.5) particleCase = 2; // MIP pions
446 if (meanP < 0.57 && meanP > 0.56) particleCase = 3; // protons 1
447 if (meanP < 0.66 && meanP > 0.65) particleCase = 4; // protons 2
449 if (fLowMemoryConsumption && particleCase == 0) continue;
451 Double_t tpcSignal = GetTPCdEdx(seed);
453 if (particleCalse == 0) {
454 Float_t corrFactor = AliExternalTrackParam::BetheBlochAleph(x/0.13957);
455 tpcSignal /= corrFactor;
458 fHistDeDxTotal->Fill(meanP, tpcSignal);
460 //dE/dx, time, type (1-muon cosmic,2-pion beam data, 3&4 protons), momenta, runNumner, eta
461 Double_t vec[7] = {tpcSignal,time,particleCase,meanDrift,meanP,runNumber, eta};
462 fHistGainTime->Fill(vec);
467 // V0 loop -- in beam events the cosmic part of the histogram is filled with GammaConversions
469 for(Int_t iv0 = 0; iv0 < event->GetNumberOfV0s(); iv0++) {
470 AliESDv0 * v0 = event->GetV0(iv0);
471 if (!v0->GetOnFlyStatus()) continue;
472 if (v0->GetEffMass(0,0) > 0.02) continue; // select low inv. mass
474 v0->GetXYZ(xyz[0], xyz[1], xyz[2]);
475 if (TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]) < 3 || TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]) > 30) continue;
477 // "loop over daughters"
479 for(Int_t idaughter = 0; idaughter < 2; idaughter++) { // daughter loop
480 Int_t index = idaughter == 0 ? v0->GetPindex() : v0->GetNindex();
481 AliESDtrack * trackP = event->GetTrack(index);
482 AliESDfriendTrack *friendTrackP = esdFriend->GetTrack(index);
483 if (!friendTrackP) continue;
484 const AliExternalTrackParam * trackPIn = trackP->GetInnerParam();
485 const AliExternalTrackParam * trackPOut = friendTrackP->GetTPCOut();
486 if (!trackPIn) continue;
487 if (!trackPOut) continue;
488 // calculate necessary track parameters
489 Double_t meanP = trackPIn->GetP();
490 Double_t meanDrift = 250 - 0.5*TMath::Abs(trackPIn->GetZ() + trackPOut->GetZ());
491 Int_t nclsDeDx = trackP->GetTPCNcls();
492 // exclude tracks which do not look like primaries or are simply too short or on wrong sectors
493 if (nclsDeDx < 60) continue;
494 if (TMath::Abs(trackPIn->GetTgl()) > 1) continue;
496 TObject *calibObject;
497 AliTPCseed *seed = 0;
498 for (Int_t l=0;(calibObject=friendTrackP->GetCalibObject(l));++l) {
499 if ((seed=dynamic_cast<AliTPCseed*>(calibObject))) break;
502 if (fLowMemoryConsumption) {
503 if (meanP > 0.5 || meanP < 0.4) continue;
504 meanP = 0.45; // set all momenta to one in order to save memory
506 Double_t tpcSignal = GetTPCdEdx(seed);
507 //dE/dx, time, type (1-muon cosmic,2-pion beam data), momenta
508 Double_t vec[6] = {tpcSignal,time,1,meanDrift,meanP,runNumber};
509 fHistGainTime->Fill(vec);
518 Float_t AliTPCcalibTimeGain::GetTPCdEdx(AliTPCseed * seed) {
520 // calculate tpc dEdx
524 if (!fUseCookAnalytical) {
525 signal = (1/fMIP)*seed->CookdEdxNorm(fLowerTrunc,fUpperTrunc,fUseMax,0,159,fUseShapeNorm,fUsePosNorm,fUsePadNorm,0);
527 signal = (1/fMIP)*seed->CookdEdxAnalytical(fLowerTrunc,fUpperTrunc,fUseMax);
534 void AliTPCcalibTimeGain::AnalyzeRun(Int_t minEntries) {
536 // Analyze results of calibration
539 fHistGainTime->GetAxis(2)->SetRangeUser(0.51,1.49); // only cosmics
540 fHistGainTime->GetAxis(4)->SetRangeUser(20,100); // only Fermi-Plateau muons
542 fHistGainTime->GetAxis(2)->SetRangeUser(1.51,2.49); // only beam data
543 fHistGainTime->GetAxis(4)->SetRangeUser(0.39,0.51); // only MIP pions
546 fGainVsTime = AliTPCcalibBase::FitSlices(fHistGainTime,0,1,minEntries,10);
552 TGraphErrors * AliTPCcalibTimeGain::GetGraphGainVsTime(Int_t runNumber, Int_t minEntries) {
554 // Analyze results and get the graph
556 if (runNumber == 0) {
558 AnalyzeRun(minEntries);
561 // 1st check if the current run was cosmic or beam event
562 fHistGainTime->GetAxis(5)->SetRangeUser(runNumber,runNumber);
563 AnalyzeRun(minEntries);
565 if (fGainVsTime->GetN() == 0) return 0;
569 Long64_t AliTPCcalibTimeGain::Merge(TCollection *li) {
573 TIterator* iter = li->MakeIterator();
574 AliTPCcalibTimeGain* cal = 0;
576 while ((cal = (AliTPCcalibTimeGain*)iter->Next())) {
577 if (!cal->InheritsFrom(AliTPCcalibTimeGain::Class())) {
578 Error("Merge","Attempt to add object of class %s to a %s", cal->ClassName(), this->ClassName());
582 // add histograms here...
583 if (cal->GetHistGainTime() && fHistGainTime )
585 if ((fHistGainTime->GetEntries() + cal->GetHistGainTime()->GetEntries()) < fgMergeEntriesCut)
587 //AliInfo(Form("fHistGainTime has %.0f tracks, going to add %.0f\n",fHistGainTime->GetEntries(),cal->GetHistGainTime()->GetEntries()));
588 fHistGainTime->Add(cal->GetHistGainTime());
592 AliInfo(Form("fHistGainTime full (has %.0f merged tracks, max allowed: %.0f)",fHistGainTime->GetEntries(),fgMergeEntriesCut));
596 if (cal->GetHistDeDxTotal()) fHistDeDxTotal->Add(cal->GetHistDeDxTotal());
605 AliSplineFit * AliTPCcalibTimeGain::MakeSplineFit(TGraphErrors * graph) {
607 // make spline fit of gain
609 AliSplineFit *fit = new AliSplineFit();
610 fit->SetGraph(graph);
611 fit->SetMinPoints(graph->GetN()+1);
612 fit->InitKnots(graph,2,0,0.001);
620 TGraphErrors * AliTPCcalibTimeGain::GetGraphAttachment(Int_t minEntries, Int_t nmaxBin, Float_t /*fracLow*/, Float_t /*fracUp*/) {
622 // For each time bin the driftlength-dependence of the signal is fitted.
624 TH3D * hist = fHistGainTime->Projection(1, 0, 3);
625 Double_t *xvec = new Double_t[hist->GetNbinsX()];
626 Double_t *yvec = new Double_t[hist->GetNbinsX()];
627 Double_t *xerr = new Double_t[hist->GetNbinsX()];
628 Double_t *yerr = new Double_t[hist->GetNbinsX()];
630 TH2D * projectionHist = 0x0;
632 for(Int_t i=1; i < hist->GetNbinsX(); i++) {
636 for (Int_t idelta=0; idelta<nmaxBin; idelta++){
638 imin = TMath::Max(i-idelta,1);
639 imax = TMath::Min(i+idelta,hist->GetNbinsX());
640 nsum = TMath::Nint(hist->Integral(imin,imax,1,hist->GetNbinsY()-1,1,hist->GetNbinsZ()-1));
642 if (nsum>minEntries) break;
644 if (nsum<minEntries) continue;
646 hist->GetXaxis()->SetRange(imin,imax);
647 projectionHist = (TH2D*)hist->Project3D("yzNUFNOF");
650 projectionHist->FitSlicesY(0,2, projectionHist->GetNbinsX()-2,0,"QNR",&arr);
651 TH1D * histAttach = (TH1D*)arr.At(1);
652 TF1 pol1("polynom1","pol1",10,240);
653 histAttach->Fit(&pol1,"QNR");
654 xvec[counter] = 0.5*(hist->GetXaxis()->GetBinCenter(imin)+hist->GetXaxis()->GetBinCenter(imax));
655 yvec[counter] = pol1.GetParameter(1)/pol1.GetParameter(0);
657 yerr[counter] = pol1.GetParError(1)/pol1.GetParameter(0);
660 delete projectionHist;
663 TGraphErrors * graphErrors = new TGraphErrors(counter, xvec, yvec, xerr, yerr);
675 void AliTPCcalibTimeGain::BinLogX(THnSparse *h, Int_t axisDim) {
677 // Method for the correct logarithmic binning of histograms
679 TAxis *axis = h->GetAxis(axisDim);
680 int bins = axis->GetNbins();
682 Double_t from = axis->GetXmin();
683 Double_t to = axis->GetXmax();
684 Double_t *newBins = new Double_t[bins + 1];
687 Double_t factor = pow(to/from, 1./bins);
689 for (int i = 1; i <= bins; i++) {
690 newBins[i] = factor * newBins[i-1];
692 axis->Set(bins, newBins);
698 void AliTPCcalibTimeGain::BinLogX(TH1 *h) {
700 // Method for the correct logarithmic binning of histograms
702 TAxis *axis = h->GetXaxis();
703 int bins = axis->GetNbins();
705 Double_t from = axis->GetXmin();
706 Double_t to = axis->GetXmax();
707 Double_t *newBins = new Double_t[bins + 1];
710 Double_t factor = pow(to/from, 1./bins);
712 for (int i = 1; i <= bins; i++) {
713 newBins[i] = factor * newBins[i-1];
715 axis->Set(bins, newBins);
722 void AliTPCcalibTimeGain::CalculateBetheAlephParams(TH2F *hist, Double_t * ini) {
724 // Fit the bethe bloch params
726 //{0.0762*MIP,10.632,1.34e-05,1.863,1.948}
727 const Double_t sigma = 0.06;
729 TH2F *histBG = new TH2F("histBG","dEdxBg; #beta #gamma; TPC signal (a.u.)",TMath::Nint(0.5*hist->GetNbinsX()),0.1,5000.,hist->GetNbinsY(),hist->GetYaxis()->GetXmin(),hist->GetYaxis()->GetXmax());
732 TF1 *foElectron = new TF1("foElectron", "AliExternalTrackParam::BetheBlochAleph(x/0.000511,[0],[1],[2],[3],[4])",0.01,100);
733 TF1 *foMuon = new TF1("foMuon", "AliExternalTrackParam::BetheBlochAleph(x/0.1056,[0],[1],[2],[3],[4])",0.01,100);
734 TF1 *foPion = new TF1("foPion", "AliExternalTrackParam::BetheBlochAleph(x/0.138,[0],[1],[2],[3],[4])",0.01,100);
735 TF1 *foKaon = new TF1("foKaon", "AliExternalTrackParam::BetheBlochAleph(x/0.498,[0],[1],[2],[3],[4])",0.01,100);
736 TF1 *foProton = new TF1("foProton", "AliExternalTrackParam::BetheBlochAleph(x/0.938,[0],[1],[2],[3],[4])",0.01,100);
737 foElectron->SetParameters(ini);
738 foMuon->SetParameters(ini);
739 foPion->SetParameters(ini);
740 foKaon->SetParameters(ini);
741 foProton->SetParameters(ini);
743 TCanvas *canvCheck1 = new TCanvas();
745 foElectron->Draw("same");
746 foMuon->Draw("same");
747 foPion->Draw("same");
748 foKaon->Draw("same");
749 foProton->Draw("same");
751 // Loop over all points of the input histogram
753 for(Int_t i=1; i < hist->GetNbinsX(); i++) {
754 Double_t x = hist->GetXaxis()->GetBinCenter(i);
755 for(Int_t j=1; j < hist->GetNbinsY(); j++) {
756 Long64_t n = hist->GetBin(i, j);
757 Double_t y = hist->GetYaxis()->GetBinCenter(j);
758 Double_t entries = hist->GetBinContent(n);
761 // 1. identify protons
763 if (TMath::Abs(y - foProton->Eval(x))/foProton->Eval(x) < 4*sigma && x < 0.65 ) {
764 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
767 // 2. identify electrons
770 if (TMath::Abs(y - foElectron->Eval(x))/foElectron->Eval(x) < 4*sigma && (x>0.25&&x<0.7) && fIsCosmic) {
771 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
774 if (TMath::Abs(y - foElectron->Eval(x))/foElectron->Eval(x) < 2*sigma && ((x>0.25&&x<0.35) || (x>1.5&&x<1.8) || (x>0.65&&x<0.7))) {
775 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
779 // 3. identify either muons or pions depending on cosmic or not
782 if (TMath::Abs(y - foMuon->Eval(x))/foMuon->Eval(x) < 4*sigma && x > 0.25 && x < 100 ) {
783 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
787 if (TMath::Abs(y - foPion->Eval(x))/foPion->Eval(x) < 4*sigma && x > 0.15 && x < 2) {
788 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
792 // 4. for pp also Kaons must be included
795 if (TMath::Abs(y - foKaon->Eval(x))/foKaon->Eval(x) < 4*sigma && x > 0.2 && x < 0.3 ) {
796 for(Int_t iEntries =0; iEntries < entries; iEntries++) histBG->Fill(x/mass, y);
802 // Fit Aleph-Parameters to the obtained profile
803 TF1 * funcAlephD = new TF1("AlephParametrizationD", "AliExternalTrackParam::BetheBlochAleph(x,[0],[1],[2],[3],[4])",0.3,10000);
804 funcAlephD->SetParameters(ini);
806 TCanvas *canvCheck2 = new TCanvas();
810 TObjArray * arr = new TObjArray();
811 histBG->FitSlicesY(0,0,-1,0,"QN",arr);
812 TH1D * fitMean = (TH1D*) arr->At(1);
813 fitMean->Draw("same");
815 funcAlephD->SetParLimits(2,1e-3,1e-7);
816 funcAlephD->SetParLimits(3,0.5,3.5);
817 funcAlephD->SetParLimits(4,0.5,3.5);
818 fitMean->Fit(funcAlephD, "QNR");
819 funcAlephD->Draw("same");
821 for(Int_t i=0;i<5;i++) ini[i] = funcAlephD->GetParameter(i);
823 foElectron->SetParameters(ini);
824 foMuon->SetParameters(ini);
825 foPion->SetParameters(ini);
826 foKaon->SetParameters(ini);
827 foProton->SetParameters(ini);
829 TCanvas *canvCheck3 = new TCanvas();
831 foElectron->Draw("same");
832 foMuon->Draw("same");
833 foPion->Draw("same");
834 foKaon->Draw("same");
835 foProton->Draw("same");