The present commit corresponds to an important change in the way the
[u/mrichter/AliRoot.git] / MUON / MUONmassPlot_ESD.C
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5473f16a 1#if !defined(__CINT__) || defined(__MAKECINT__)
2// ROOT includes
48d6b312 3#include "TTree.h"
5473f16a 4#include "TBranch.h"
5#include "TClonesArray.h"
6#include "TLorentzVector.h"
7#include "TFile.h"
8#include "TH1.h"
ac3c5325 9#include "TH2.h"
5473f16a 10#include "TParticle.h"
11#include "TTree.h"
12#include <Riostream.h>
8cde4af5 13#include <TGeoManager.h>
21939432 14#include <TROOT.h>
5473f16a 15
16// STEER includes
0ff94351 17#include "AliLog.h"
f7a1cc68 18#include "AliMagF.h"
1c2bdf00 19#include "AliESDEvent.h"
995a61aa 20#include "AliESDVertex.h"
0ff94351 21#include "AliTracker.h"
103e6575 22#include "AliESDMuonTrack.h"
5473f16a 23
24// MUON includes
211c52eb 25#include "AliMUONTrackParam.h"
37827b29 26#include "AliMUONTrackExtrap.h"
103e6575 27#include "AliMUONESDInterface.h"
5473f16a 28#endif
5473f16a 29
e54bf126 30/// \ingroup macros
31/// \file MUONmassPlot_ESD.C
32/// \brief Macro MUONefficiency.C for ESD
33///
34/// \author Ch. Finck, Subatech, April. 2004
35///
36///
37/// Macro to make invariant mass plots
38/// for combinations of 2 muons with opposite charges,
39/// from root file "MUON.tracks.root" containing the result of track reconstruction.
40/// Histograms are stored on the "MUONmassPlot.root" file.
41/// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
42/// using Invariant Mass for rapidity.
43///
44/// Add parameters and histograms for analysis
5473f16a 45
cec5541f 46Bool_t MUONmassPlot(Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root",
8cde4af5 47 Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553,
5473f16a 48 Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
49 Float_t massMin = 9.17,Float_t massMax = 9.77)
50{
e54bf126 51/// \param ExtrapToVertex (default -1)
52/// - <0: no extrapolation;
53/// - =0: extrapolation to (0,0,0);
54/// - >0: extrapolation to ESDVertex if available, else to (0,0,0)
55/// \param FirstEvent (default 0)
56/// \param LastEvent (default 0)
57/// \param ResType 553 for Upsilon, anything else for J/Psi (default 553)
58/// \param Chi2Cut to keep only tracks with chi2 per d.o.f. < Chi2Cut (default 100)
59/// \param PtCutMin to keep only tracks with transverse momentum > PtCutMin (default 1)
60/// \param PtCutMax to keep only tracks with transverse momentum < PtCutMax (default 10000)
61/// \param massMin (default 9.17 for Upsilon)
62/// \param massMax (default 9.77 for Upsilon);
63/// to calculate the reconstruction efficiency for resonances with invariant mass
64/// massMin < mass < massMax.
65
5473f16a 66 cout << "MUONmassPlot " << endl;
67 cout << "FirstEvent " << FirstEvent << endl;
68 cout << "LastEvent " << LastEvent << endl;
69 cout << "ResType " << ResType << endl;
70 cout << "Chi2Cut " << Chi2Cut << endl;
71 cout << "PtCutMin " << PtCutMin << endl;
72 cout << "PtCutMax " << PtCutMax << endl;
73 cout << "massMin " << massMin << endl;
74 cout << "massMax " << massMax << endl;
75
76
77 //Reset ROOT and connect tree file
78 gROOT->Reset();
79
5473f16a 80 // File for histograms and histogram booking
81 TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
82 TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325 83 TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
84 TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a 85 TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
86 TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
87 TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325 88 TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a 89 TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
90 TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
91 TH1F *hInvMassRes;
6ab68e5f 92 TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a 93
94 if (ResType == 553) {
95 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
96 } else {
97 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
98 }
99
100 TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
101 TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
102 TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
103 TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325 104 TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
105 TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a 106
107
108 // settings
109 Int_t EventInMass = 0;
6678cd54 110 Int_t EventInMassMatch = 0;
111 Int_t NbTrigger = 0;
112
5473f16a 113 Float_t muonMass = 0.105658389;
114// Float_t UpsilonMass = 9.46037;
115// Float_t JPsiMass = 3.097;
116
22ccc301 117 Int_t fCharge1, fCharge2;
5473f16a 118 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
119 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
5473f16a 120
121 Int_t ntrackhits, nevents;
122 Double_t fitfmin;
e3c6ae4c 123 Double_t fZVertex=0;
211c52eb 124 Double_t fYVertex=0;
125 Double_t fXVertex=0;
690d2205 126 Double_t errXVtx=0;
127 Double_t errYVtx=0;
5473f16a 128
129 TLorentzVector fV1, fV2, fVtot;
cb75342e 130
8cde4af5 131 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
132 if (!gGeoManager) {
133 TGeoManager::Import(geoFilename);
134 if (!gGeoManager) {
cec5541f 135 Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
8cde4af5 136 return kFALSE;
137 }
138 }
139
0ff94351 140 // set mag field
141 // waiting for mag field in CDB
f7a1cc68 142 if (!TGeoGlobalMagField::Instance()->GetField()) {
143 printf("Loading field map...\n");
144 AliMagF* field = new AliMagF("Maps","Maps",2,1.,1., 10.,AliMagF::k5kG);
145 TGeoGlobalMagField::Instance()->SetField(field);
146 }
147 // set the magnetic field for track extrapolations
148 AliMUONTrackExtrap::SetField();
149
cb75342e 150
5473f16a 151 // open the ESD file
152 TFile* esdFile = TFile::Open(esdFileName);
153 if (!esdFile || !esdFile->IsOpen()) {
154 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
155 return kFALSE;
156 }
157
1c2bdf00 158 AliESDEvent* esd = new AliESDEvent();
48d6b312 159 TTree* tree = (TTree*) esdFile->Get("esdTree");
160 if (!tree) {
161 Error("CheckESD", "no ESD tree found");
162 return kFALSE;
163 }
8b4a9b89 164// tree->SetBranchAddress("ESD", &esd);
165 esd->ReadFromTree(tree);
f9ebb3bd 166
cec5541f 167 nevents = (Int_t)tree->GetEntries();
211c52eb 168
169 AliMUONTrackParam trackParam;
0ff94351 170
5473f16a 171 // Loop over events
172 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
173
5473f16a 174 // get the event summary data
48d6b312 175 tree->GetEvent(iEvent);
5473f16a 176 if (!esd) {
48d6b312 177 Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a 178 return kFALSE;
179 }
180
f9ebb3bd 181 // get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8 182 AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8 183 if (Vertex->GetNContributors()) {
211c52eb 184 fZVertex = Vertex->GetZv();
185 fYVertex = Vertex->GetYv();
186 fXVertex = Vertex->GetXv();
690d2205 187 errXVtx = Vertex->GetXRes();
188 errYVtx = Vertex->GetYRes();
211c52eb 189 }
f9ebb3bd 190 hPrimaryVertex->Fill(fZVertex);
191
48d6b312 192 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a 193
194 // printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312 195 // cout << " number of tracks: " << nTracks <<endl;
5473f16a 196
197 // loop over all reconstructed tracks (also first track of combination)
198 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
199
b1fea02e 200 // skip ghosts
201 if (!esd->GetMuonTrack(iTrack)->ContainTrackerData()) continue;
202
8cde4af5 203 AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a 204
8cde4af5 205 // extrapolate to vertex if required and available
206 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
103e6575 207 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
690d2205 208 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
103e6575 209 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5 210 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
103e6575 211 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
690d2205 212 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
103e6575 213 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb 214 }
8cde4af5 215
22ccc301 216 fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
217
218 muonTrack->LorentzP(fV1);
8cde4af5 219
5473f16a 220 ntrackhits = muonTrack->GetNHit();
221 fitfmin = muonTrack->GetChi2();
222
223 // transverse momentum
224 Float_t pt1 = fV1.Pt();
225
226 // total momentum
227 Float_t p1 = fV1.P();
228
229 // Rapidity
230 Float_t rapMuon1 = fV1.Rapidity();
231
232 // chi2 per d.o.f.
233 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
234// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
22ccc301 235// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
5473f16a 236
237 // condition for good track (Chi2Cut and PtCut)
238
239 if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
240
241 // fill histos hPtMuon and hChi2PerDof
242 hPtMuon->Fill(pt1);
243 hPMuon->Fill(p1);
244 hChi2PerDof->Fill(ch1);
245 hRapMuon->Fill(rapMuon1);
22ccc301 246 if (fCharge1 > 0) {
ac3c5325 247 hPtMuonPlus->Fill(pt1);
22ccc301 248 hThetaPhiPlus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
ac3c5325 249 } else {
250 hPtMuonMinus->Fill(pt1);
22ccc301 251 hThetaPhiMinus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
ac3c5325 252 }
5473f16a 253 // loop over second track of combination
254 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
255
b1fea02e 256 // skip ghosts
257 if (!esd->GetMuonTrack(iTrack2)->ContainTrackerData()) continue;
258
8cde4af5 259 AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
260
261 // extrapolate to vertex if required and available
262 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
103e6575 263 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
690d2205 264 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
103e6575 265 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5 266 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
103e6575 267 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
690d2205 268 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
103e6575 269 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb 270 }
8cde4af5 271
8cde4af5 272 fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a 273
22ccc301 274 muonTrack2->LorentzP(fV2);
5473f16a 275
8cde4af5 276 ntrackhits = muonTrack2->GetNHit();
277 fitfmin = muonTrack2->GetChi2();
5473f16a 278
279 // transverse momentum
280 Float_t pt2 = fV2.Pt();
281
282 // chi2 per d.o.f.
283 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
284
285 // condition for good track (Chi2Cut and PtCut)
286 if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
287
288 // condition for opposite charges
22ccc301 289 if ((fCharge1 * fCharge2) == -1) {
5473f16a 290
291 // invariant mass
292 fVtot = fV1 + fV2;
293 Float_t invMass = fVtot.M();
294
295 // fill histos hInvMassAll and hInvMassRes
296 hInvMassAll->Fill(invMass);
297 hInvMassRes->Fill(invMass);
ac3c5325 298 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54 299 Int_t ptTrig;
300 if (ResType == 553)
8d4fefab 301 ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54 302 else
8d4fefab 303 ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54 304
f57d136a 305 if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a 306 if (invMass > massMin && invMass < massMax) {
307 EventInMass++;
8cde4af5 308 if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54 309 EventInMassMatch++;
310
5473f16a 311 hRapResonance->Fill(fVtot.Rapidity());
312 hPtResonance->Fill(fVtot.Pt());
313 }
314
22ccc301 315 } // if (fCharge1 * fCharge2) == -1)
5473f16a 316 } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5 317 delete muonTrack2;
5473f16a 318 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
319 } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5 320 delete muonTrack;
5473f16a 321 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
322
323 hNumberOfTrack->Fill(nTracks);
48d6b312 324 // esdFile->Delete();
5473f16a 325 } // for (Int_t iEvent = FirstEvent;
326
ac3c5325 327// Loop over events for bg event
328
329 Double_t thetaPlus, phiPlus;
330 Double_t thetaMinus, phiMinus;
331 Float_t PtMinus, PtPlus;
332
333 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
334
335 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
336 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
337 PtPlus = hPtMuonPlus->GetRandom();
338 PtMinus = hPtMuonMinus->GetRandom();
339
340 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
341 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
342 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
343
344 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
345 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
346
347 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
348 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
349 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
350
351 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
352 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
353
354 // invariant mass
355 fVtot = fV1 + fV2;
356
357 // fill histos hInvMassAll and hInvMassRes
358 hInvMassBg->Fill(fVtot.M());
359 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
360 }
361
5473f16a 362 histoFile->Write();
363 histoFile->Close();
364
6678cd54 365 cout << endl;
5473f16a 366 cout << "EventInMass " << EventInMass << endl;
6678cd54 367 cout << "NbTrigger " << NbTrigger << endl;
368 cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a 369
370 return kTRUE;
371}
372