1 #if !defined(__CINT__) || defined(__MAKECINT__)
5 #include "TClonesArray.h"
6 #include "TLorentzVector.h"
10 #include "TParticle.h"
12 #include <Riostream.h>
13 #include <TGeoManager.h>
18 #include "AliCDBManager.h"
19 #include "AliESDEvent.h"
20 #include "AliESDVertex.h"
21 #include "AliESDMuonTrack.h"
24 #include "AliMUONCDB.h"
25 #include "AliMUONTrackParam.h"
26 #include "AliMUONTrackExtrap.h"
27 #include "AliMUONESDInterface.h"
31 /// \file MUONmassPlot_ESD.C
32 /// \brief Macro MUONmassPlot_ESD.C for ESD
34 /// \author Ch. Finck, Subatech, April. 2004
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.
44 /// Add parameters and histograms for analysis
46 Bool_t MUONmassPlot(const char* esdFileName = "AliESDs.root", const char* geoFilename = "geometry.root",
47 const char* ocdbPath = "local://$ALICE_ROOT/OCDB",
48 Int_t FirstEvent = 0, Int_t LastEvent = 10000, Int_t ExtrapToVertex = -1,
49 Int_t ResType = 553, Float_t Chi2Cut = 100., Float_t PtCutMin = 1.,
50 Float_t PtCutMax = 10000., Float_t massMin = 9.17,Float_t massMax = 9.77)
52 /// \param FirstEvent (default 0)
53 /// \param LastEvent (default 10000)
54 /// \param ExtrapToVertex (default -1)
55 /// - <0: no extrapolation;
56 /// - =0: extrapolation to (0,0,0);
57 /// - >0: extrapolation to ESDVertex if available, else to (0,0,0)
58 /// \param ResType 553 for Upsilon, anything else for J/Psi (default 553)
59 /// \param Chi2Cut to keep only tracks with chi2 per d.o.f. < Chi2Cut (default 100)
60 /// \param PtCutMin to keep only tracks with transverse momentum > PtCutMin (default 1)
61 /// \param PtCutMax to keep only tracks with transverse momentum < PtCutMax (default 10000)
62 /// \param massMin (default 9.17 for Upsilon)
63 /// \param massMax (default 9.77 for Upsilon);
64 /// to calculate the reconstruction efficiency for resonances with invariant mass
65 /// massMin < mass < massMax.
67 cout << "MUONmassPlot " << endl;
68 cout << "FirstEvent " << FirstEvent << endl;
69 cout << "LastEvent " << LastEvent << endl;
70 cout << "ResType " << ResType << endl;
71 cout << "Chi2Cut " << Chi2Cut << endl;
72 cout << "PtCutMin " << PtCutMin << endl;
73 cout << "PtCutMax " << PtCutMax << endl;
74 cout << "massMin " << massMin << endl;
75 cout << "massMax " << massMax << endl;
78 //Reset ROOT and connect tree file
81 // File for histograms and histogram booking
82 TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
83 TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
84 TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
85 TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
86 TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
87 TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
88 TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
89 TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
90 TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
91 TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
93 TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
96 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
98 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
101 TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
102 TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
103 TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
104 TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
105 TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
106 TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
110 Int_t EventInMass = 0;
111 Int_t EventInMassMatch = 0;
114 Float_t muonMass = 0.105658389;
115 // Float_t UpsilonMass = 9.46037;
116 // Float_t JPsiMass = 3.097;
118 Int_t fCharge1, fCharge2;
119 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
120 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
130 TLorentzVector fV1, fV2, fVtot;
132 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
134 TGeoManager::Import(geoFilename);
136 Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
142 TFile* esdFile = TFile::Open(esdFileName);
143 if (!esdFile || !esdFile->IsOpen()) {
144 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
147 AliESDEvent* esd = new AliESDEvent();
148 TTree* tree = (TTree*) esdFile->Get("esdTree");
150 Error("MUONmass_ESD", "no ESD tree found");
153 esd->ReadFromTree(tree);
156 if (tree->GetEvent(0) <= 0) {
157 Error("MUONmass_ESD", "no ESD object found for event 0");
160 Int_t runNumber = esd->GetRunNumber();
162 // load necessary data from OCDB
163 AliCDBManager::Instance()->SetDefaultStorage(ocdbPath);
164 AliCDBManager::Instance()->SetRun(runNumber);
165 if (!AliMUONCDB::LoadField()) return kFALSE;
167 // set the magnetic field for track extrapolations
168 AliMUONTrackExtrap::SetField();
170 AliMUONTrackParam trackParam;
173 Int_t nevents = (Int_t)tree->GetEntries();
174 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
176 // get the event summary data
177 if (tree->GetEvent(iEvent) <= 0) {
178 Error("MUONmass_ESD", "no ESD object found for event %d", iEvent);
182 // get the SPD reconstructed vertex (vertexer) and fill the histogram
183 AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
184 if (Vertex->GetNContributors()) {
185 fZVertex = Vertex->GetZv();
186 fYVertex = Vertex->GetYv();
187 fXVertex = Vertex->GetXv();
188 errXVtx = Vertex->GetXRes();
189 errYVtx = Vertex->GetYRes();
191 hPrimaryVertex->Fill(fZVertex);
193 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
195 // printf("\n Nb of events analysed: %d\r",iEvent);
196 // cout << " number of tracks: " << nTracks <<endl;
198 // loop over all reconstructed tracks (also first track of combination)
199 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
202 if (!esd->GetMuonTrack(iTrack)->ContainTrackerData()) continue;
204 AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
206 // extrapolate to vertex if required and available
207 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
208 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
209 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
210 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
212 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
213 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
214 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
217 fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
219 muonTrack->LorentzP(fV1);
221 ntrackhits = muonTrack->GetNHit();
222 fitfmin = muonTrack->GetChi2();
224 // transverse momentum
225 Float_t pt1 = fV1.Pt();
228 Float_t p1 = fV1.P();
231 Float_t rapMuon1 = fV1.Rapidity();
234 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
235 // printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
236 // fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
238 // condition for good track (Chi2Cut and PtCut)
240 // if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
242 // fill histos hPtMuon and hChi2PerDof
245 hChi2PerDof->Fill(ch1);
246 hRapMuon->Fill(rapMuon1);
248 hPtMuonPlus->Fill(pt1);
249 hThetaPhiPlus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
251 hPtMuonMinus->Fill(pt1);
252 hThetaPhiMinus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
254 // loop over second track of combination
255 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
258 if (!esd->GetMuonTrack(iTrack2)->ContainTrackerData()) continue;
260 AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
262 // extrapolate to vertex if required and available
263 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
264 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
265 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
266 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
267 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
268 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
269 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
270 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
273 fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
275 muonTrack2->LorentzP(fV2);
277 ntrackhits = muonTrack2->GetNHit();
278 fitfmin = muonTrack2->GetChi2();
280 // transverse momentum
281 Float_t pt2 = fV2.Pt();
284 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
286 // condition for good track (Chi2Cut and PtCut)
287 // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
289 // condition for opposite charges
290 if ((fCharge1 * fCharge2) == -1) {
294 Float_t invMass = fVtot.M();
296 // fill histos hInvMassAll and hInvMassRes
297 hInvMassAll->Fill(invMass);
298 hInvMassRes->Fill(invMass);
299 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
302 ptTrig = 0x20;// mask for Hpt unlike sign pair
304 ptTrig = 0x10;// mask for Lpt unlike sign pair
306 if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
307 if (invMass > massMin && invMass < massMax) {
309 if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
312 hRapResonance->Fill(fVtot.Rapidity());
313 hPtResonance->Fill(fVtot.Pt());
316 } // if (fCharge1 * fCharge2) == -1)
317 // } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
319 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
320 // } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
322 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
324 hNumberOfTrack->Fill(nTracks);
325 // esdFile->Delete();
326 } // for (Int_t iEvent = FirstEvent;
328 // Loop over events for bg event
330 Double_t thetaPlus, phiPlus;
331 Double_t thetaMinus, phiMinus;
332 Float_t PtMinus, PtPlus;
334 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
336 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
337 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
338 PtPlus = hPtMuonPlus->GetRandom();
339 PtMinus = hPtMuonMinus->GetRandom();
341 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
342 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
343 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
345 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
346 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
348 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
349 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
350 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
352 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
353 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
358 // fill histos hInvMassAll and hInvMassRes
359 hInvMassBg->Fill(fVtot.M());
360 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
367 cout << "EventInMass " << EventInMass << endl;
368 cout << "NbTrigger " << NbTrigger << endl;
369 cout << "EventInMass match with trigger " << EventInMassMatch << endl;