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 "AliRunLoader.h"
19 #include "AliHeader.h"
20 #include "AliLoader.h"
22 #include "AliMagFMaps.h"
24 #include "AliTracker.h"
27 #include "AliMUONTrackParam.h"
28 #include "AliMUONTrackExtrap.h"
29 #include "AliESDMuonTrack.h"
32 // Macro MUONmassPlot.C for ESD
33 // Ch. Finck, Subatech, April. 2004
36 // macro to make invariant mass plots
37 // for combinations of 2 muons with opposite charges,
38 // from root file "MUON.tracks.root" containing the result of track reconstruction.
39 // Histograms are stored on the "MUONmassPlot.root" file.
40 // introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
41 // using Invariant Mass for rapidity.
44 // ExtrapToVertex (default -1)
45 // <0: no extrapolation;
46 // =0: extrapolation to (0,0,0);
47 // >0: extrapolation to ESDVertex if available, else to (0,0,0)
48 // FirstEvent (default 0)
49 // LastEvent (default 0)
50 // ResType (default 553)
51 // 553 for Upsilon, anything else for J/Psi
52 // Chi2Cut (default 100)
53 // to keep only tracks with chi2 per d.o.f. < Chi2Cut
54 // PtCutMin (default 1)
55 // to keep only tracks with transverse momentum > PtCutMin
56 // PtCutMax (default 10000)
57 // to keep only tracks with transverse momentum < PtCutMax
58 // massMin (default 9.17 for Upsilon)
59 // & massMax (default 9.77 for Upsilon)
60 // to calculate the reconstruction efficiency for resonances with invariant mass
61 // massMin < mass < massMax.
63 // Add parameters and histograms for analysis
65 Bool_t MUONmassPlot(Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root", char* filename = "galice.root",
66 Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553,
67 Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
68 Float_t massMin = 9.17,Float_t massMax = 9.77)
70 cout << "MUONmassPlot " << endl;
71 cout << "FirstEvent " << FirstEvent << endl;
72 cout << "LastEvent " << LastEvent << endl;
73 cout << "ResType " << ResType << endl;
74 cout << "Chi2Cut " << Chi2Cut << endl;
75 cout << "PtCutMin " << PtCutMin << endl;
76 cout << "PtCutMax " << PtCutMax << endl;
77 cout << "massMin " << massMin << endl;
78 cout << "massMax " << massMax << endl;
81 //Reset ROOT and connect tree file
84 // File for histograms and histogram booking
85 TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
86 TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
87 TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
88 TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
89 TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
90 TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
91 TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
92 TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
93 TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
94 TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
96 TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
99 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
101 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
104 TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
105 TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
106 TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
107 TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
108 TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
109 TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
113 Int_t EventInMass = 0;
114 Int_t EventInMassMatch = 0;
117 Float_t muonMass = 0.105658389;
118 // Float_t UpsilonMass = 9.46037;
119 // Float_t JPsiMass = 3.097;
121 Int_t fCharge1, fCharge2;
122 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
123 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
125 Int_t ntrackhits, nevents;
131 TLorentzVector fV1, fV2, fVtot;
133 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
135 TGeoManager::Import(geoFilename);
137 Error("MUONmass_ESD", "getting geometry from file %s failed", filename);
143 // waiting for mag field in CDB
144 printf("Loading field map...\n");
145 AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
146 AliTracker::SetFieldMap(field, kFALSE);
148 // open run loader and load gAlice, kinematics and header
149 AliRunLoader* runLoader = AliRunLoader::Open(filename);
151 Error("MUONmass_ESD", "getting run loader from file %s failed", filename);
156 Error("MUONmass_ESD", "no galice object found");
162 TFile* esdFile = TFile::Open(esdFileName);
163 if (!esdFile || !esdFile->IsOpen()) {
164 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
168 AliESD* esd = new AliESD();
169 TTree* tree = (TTree*) esdFile->Get("esdTree");
171 Error("CheckESD", "no ESD tree found");
174 tree->SetBranchAddress("ESD", &esd);
178 runLoader->LoadHeader();
179 nevents = runLoader->GetNumberOfEvents();
181 AliMUONTrackParam trackParam;
184 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
187 runLoader->GetEvent(iEvent);
189 // get the event summary data
190 tree->GetEvent(iEvent);
192 Error("CheckESD", "no ESD object found for event %d", iEvent);
196 // get the SPD reconstructed vertex (vertexer) and fill the histogram
197 AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
198 if (Vertex->GetNContributors()) {
199 fZVertex = Vertex->GetZv();
200 fYVertex = Vertex->GetYv();
201 fXVertex = Vertex->GetXv();
203 hPrimaryVertex->Fill(fZVertex);
205 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
207 // printf("\n Nb of events analysed: %d\r",iEvent);
208 // cout << " number of tracks: " << nTracks <<endl;
210 // set the magnetic field for track extrapolations
211 AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
212 // loop over all reconstructed tracks (also first track of combination)
213 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
215 AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
217 // extrapolate to vertex if required and available
218 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
219 trackParam.GetParamFromUncorrected(*muonTrack);
220 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
221 trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
222 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
223 trackParam.GetParamFromUncorrected(*muonTrack);
224 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
225 trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
228 fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
230 muonTrack->LorentzP(fV1);
232 ntrackhits = muonTrack->GetNHit();
233 fitfmin = muonTrack->GetChi2();
235 // transverse momentum
236 Float_t pt1 = fV1.Pt();
239 Float_t p1 = fV1.P();
242 Float_t rapMuon1 = fV1.Rapidity();
245 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
246 // printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
247 // fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
249 // condition for good track (Chi2Cut and PtCut)
251 if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
253 // fill histos hPtMuon and hChi2PerDof
256 hChi2PerDof->Fill(ch1);
257 hRapMuon->Fill(rapMuon1);
259 hPtMuonPlus->Fill(pt1);
260 hThetaPhiPlus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
262 hPtMuonMinus->Fill(pt1);
263 hThetaPhiMinus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
265 // loop over second track of combination
266 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
268 AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
270 // extrapolate to vertex if required and available
271 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
272 trackParam.GetParamFromUncorrected(*muonTrack2);
273 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
274 trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
275 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
276 trackParam.GetParamFromUncorrected(*muonTrack2);
277 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
278 trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
281 fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
283 muonTrack2->LorentzP(fV2);
285 ntrackhits = muonTrack2->GetNHit();
286 fitfmin = muonTrack2->GetChi2();
288 // transverse momentum
289 Float_t pt2 = fV2.Pt();
292 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
294 // condition for good track (Chi2Cut and PtCut)
295 if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
297 // condition for opposite charges
298 if ((fCharge1 * fCharge2) == -1) {
302 Float_t invMass = fVtot.M();
304 // fill histos hInvMassAll and hInvMassRes
305 hInvMassAll->Fill(invMass);
306 hInvMassRes->Fill(invMass);
307 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
310 ptTrig = 0x20;// mask for Hpt unlike sign pair
312 ptTrig = 0x10;// mask for Lpt unlike sign pair
314 if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
315 if (invMass > massMin && invMass < massMax) {
317 if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
320 hRapResonance->Fill(fVtot.Rapidity());
321 hPtResonance->Fill(fVtot.Pt());
324 } // if (fCharge1 * fCharge2) == -1)
325 } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
327 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
328 } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
330 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
332 hNumberOfTrack->Fill(nTracks);
333 // esdFile->Delete();
334 } // for (Int_t iEvent = FirstEvent;
336 // Loop over events for bg event
338 Double_t thetaPlus, phiPlus;
339 Double_t thetaMinus, phiMinus;
340 Float_t PtMinus, PtPlus;
342 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
344 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
345 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
346 PtPlus = hPtMuonPlus->GetRandom();
347 PtMinus = hPtMuonMinus->GetRandom();
349 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
350 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
351 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
353 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
354 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
356 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
357 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
358 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
360 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
361 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
366 // fill histos hInvMassAll and hInvMassRes
367 hInvMassBg->Fill(fVtot.M());
368 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
375 cout << "EventInMass " << EventInMass << endl;
376 cout << "NbTrigger " << NbTrigger << endl;
377 cout << "EventInMass match with trigger " << EventInMassMatch << endl;