1 #if !defined(__CINT__) || defined(__MAKECINT__)
5 #include "TClonesArray.h"
6 #include "TLorentzVector.h"
10 #include "TParticle.h"
12 #include <Riostream.h>
16 #include "AliRunLoader.h"
17 #include "AliHeader.h"
18 #include "AliLoader.h"
23 #include "AliESDMuonTrack.h"
26 // Macro MUONmassPlot.C for ESD
27 // Ch. Finck, Subatech, April. 2004
30 // macro to make invariant mass plots
31 // for combinations of 2 muons with opposite charges,
32 // from root file "MUON.tracks.root" containing the result of track reconstruction.
33 // Histograms are stored on the "MUONmassPlot.root" file.
34 // introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
35 // using Invariant Mass for rapidity.
38 // FirstEvent (default 0)
39 // LastEvent (default 0)
40 // ResType (default 553)
41 // 553 for Upsilon, anything else for J/Psi
42 // Chi2Cut (default 100)
43 // to keep only tracks with chi2 per d.o.f. < Chi2Cut
44 // PtCutMin (default 1)
45 // to keep only tracks with transverse momentum > PtCutMin
46 // PtCutMax (default 10000)
47 // to keep only tracks with transverse momentum < PtCutMax
48 // massMin (default 9.17 for Upsilon)
49 // & massMax (default 9.77 for Upsilon)
50 // to calculate the reconstruction efficiency for resonances with invariant mass
51 // massMin < mass < massMax.
53 // Add parameters and histograms for analysis
55 Bool_t MUONmassPlot(char* filename = "galice.root", Int_t FirstEvent = 0, Int_t LastEvent = 10000,
56 char* esdFileName = "AliESDs.root", Int_t ResType = 553,
57 Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
58 Float_t massMin = 9.17,Float_t massMax = 9.77)
60 cout << "MUONmassPlot " << endl;
61 cout << "FirstEvent " << FirstEvent << endl;
62 cout << "LastEvent " << LastEvent << endl;
63 cout << "ResType " << ResType << endl;
64 cout << "Chi2Cut " << Chi2Cut << endl;
65 cout << "PtCutMin " << PtCutMin << endl;
66 cout << "PtCutMax " << PtCutMax << endl;
67 cout << "massMin " << massMin << endl;
68 cout << "massMax " << massMax << endl;
71 //Reset ROOT and connect tree file
75 // File for histograms and histogram booking
76 TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
77 TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
78 TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
79 TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
80 TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
81 TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
82 TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
83 TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
84 TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
85 TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
89 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
91 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
94 TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
95 TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
96 TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
97 TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
98 TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
99 TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
103 Int_t EventInMass = 0;
104 Float_t muonMass = 0.105658389;
105 // Float_t UpsilonMass = 9.46037;
106 // Float_t JPsiMass = 3.097;
108 Double_t thetaX, thetaY, pYZ;
109 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
110 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
111 Int_t fCharge, fCharge2;
113 Int_t ntrackhits, nevents;
117 TLorentzVector fV1, fV2, fVtot;
119 // open run loader and load gAlice, kinematics and header
120 AliRunLoader* runLoader = AliRunLoader::Open(filename);
122 Error("MUONmass_ESD", "getting run loader from file %s failed",
127 runLoader->LoadgAlice();
128 gAlice = runLoader->GetAliRun();
130 Error("MUONmass_ESD", "no galice object found");
136 TFile* esdFile = TFile::Open(esdFileName);
137 if (!esdFile || !esdFile->IsOpen()) {
138 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
142 AliESD* esd = new AliESD();
143 TTree* tree = (TTree*) esdFile->Get("esdTree");
145 Error("CheckESD", "no ESD tree found");
148 tree->SetBranchAddress("ESD", &esd);
150 runLoader->LoadHeader();
151 nevents = runLoader->GetNumberOfEvents();
154 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
157 runLoader->GetEvent(iEvent);
159 // get the event summary data
160 tree->GetEvent(iEvent);
162 Error("CheckESD", "no ESD object found for event %d", iEvent);
166 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
168 // printf("\n Nb of events analysed: %d\r",iEvent);
169 // cout << " number of tracks: " << nTracks <<endl;
171 // loop over all reconstructed tracks (also first track of combination)
172 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
174 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack);
176 thetaX = muonTrack->GetThetaX();
177 thetaY = muonTrack->GetThetaY();
179 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
180 fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaX));
181 fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
182 fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
183 fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
185 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
186 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
188 ntrackhits = muonTrack->GetNHit();
189 fitfmin = muonTrack->GetChi2();
191 // transverse momentum
192 Float_t pt1 = fV1.Pt();
195 Float_t p1 = fV1.P();
198 Float_t rapMuon1 = fV1.Rapidity();
201 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
202 // printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
203 // fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
205 // condition for good track (Chi2Cut and PtCut)
207 if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
209 // fill histos hPtMuon and hChi2PerDof
212 hChi2PerDof->Fill(ch1);
213 hRapMuon->Fill(rapMuon1);
215 hPtMuonPlus->Fill(pt1);
216 hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
218 hPtMuonMinus->Fill(pt1);
219 hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
221 // loop over second track of combination
222 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
224 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack2);
226 thetaX = muonTrack->GetThetaX();
227 thetaY = muonTrack->GetThetaY();
229 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
230 fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaX));
231 fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
232 fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
233 fCharge2 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
235 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
236 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
238 ntrackhits = muonTrack->GetNHit();
239 fitfmin = muonTrack->GetChi2();
241 // transverse momentum
242 Float_t pt2 = fV2.Pt();
245 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
247 // condition for good track (Chi2Cut and PtCut)
248 if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
250 // condition for opposite charges
251 if ((fCharge * fCharge2) == -1) {
255 Float_t invMass = fVtot.M();
257 // fill histos hInvMassAll and hInvMassRes
258 hInvMassAll->Fill(invMass);
259 hInvMassRes->Fill(invMass);
260 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
261 if (invMass > massMin && invMass < massMax) {
263 hRapResonance->Fill(fVtot.Rapidity());
264 hPtResonance->Fill(fVtot.Pt());
267 } // if (fCharge * fCharge2) == -1)
268 } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
269 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
270 } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
271 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
273 hNumberOfTrack->Fill(nTracks);
274 // esdFile->Delete();
275 } // for (Int_t iEvent = FirstEvent;
277 // Loop over events for bg event
279 Double_t thetaPlus, phiPlus;
280 Double_t thetaMinus, phiMinus;
281 Float_t PtMinus, PtPlus;
283 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
285 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
286 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
287 PtPlus = hPtMuonPlus->GetRandom();
288 PtMinus = hPtMuonMinus->GetRandom();
290 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
291 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
292 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
294 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
295 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
297 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
298 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
299 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
301 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
302 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
307 // fill histos hInvMassAll and hInvMassRes
308 hInvMassBg->Fill(fVtot.M());
309 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
315 cout << "MUONmassPlot " << endl;
316 cout << "FirstEvent " << FirstEvent << endl;
317 cout << "LastEvent " << LastEvent << endl;
318 cout << "ResType " << ResType << endl;
319 cout << "Chi2Cut " << Chi2Cut << endl;
320 cout << "PtCutMin " << PtCutMin << endl;
321 cout << "PtCutMax " << PtCutMax << endl;
322 cout << "massMin " << massMin << endl;
323 cout << "massMax " << massMax << endl;
324 cout << "EventInMass " << EventInMass << endl;