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"
24 #include "AliESDMuonTrack.h"
27 // Macro MUONmassPlot.C for ESD
28 // Ch. Finck, Subatech, April. 2004
31 // macro to make invariant mass plots
32 // for combinations of 2 muons with opposite charges,
33 // from root file "MUON.tracks.root" containing the result of track reconstruction.
34 // Histograms are stored on the "MUONmassPlot.root" file.
35 // introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
36 // using Invariant Mass for rapidity.
39 // FirstEvent (default 0)
40 // LastEvent (default 0)
41 // ResType (default 553)
42 // 553 for Upsilon, anything else for J/Psi
43 // Chi2Cut (default 100)
44 // to keep only tracks with chi2 per d.o.f. < Chi2Cut
45 // PtCutMin (default 1)
46 // to keep only tracks with transverse momentum > PtCutMin
47 // PtCutMax (default 10000)
48 // to keep only tracks with transverse momentum < PtCutMax
49 // massMin (default 9.17 for Upsilon)
50 // & massMax (default 9.77 for Upsilon)
51 // to calculate the reconstruction efficiency for resonances with invariant mass
52 // massMin < mass < massMax.
54 // Add parameters and histograms for analysis
56 Bool_t MUONmassPlot(char* filename = "galice.root", Int_t FirstEvent = 0, Int_t LastEvent = 10000,
57 char* esdFileName = "AliESDs.root", Int_t ResType = 553,
58 Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
59 Float_t massMin = 9.17,Float_t massMax = 9.77)
61 cout << "MUONmassPlot " << endl;
62 cout << "FirstEvent " << FirstEvent << endl;
63 cout << "LastEvent " << LastEvent << endl;
64 cout << "ResType " << ResType << endl;
65 cout << "Chi2Cut " << Chi2Cut << endl;
66 cout << "PtCutMin " << PtCutMin << endl;
67 cout << "PtCutMax " << PtCutMax << endl;
68 cout << "massMin " << massMin << endl;
69 cout << "massMax " << massMax << endl;
72 //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.);
87 TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",120,-12,12);
90 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
92 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
95 TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
96 TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
97 TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
98 TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
99 TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
100 TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
104 Int_t EventInMass = 0;
105 Int_t EventInMassMatch = 0;
108 Float_t muonMass = 0.105658389;
109 // Float_t UpsilonMass = 9.46037;
110 // Float_t JPsiMass = 3.097;
112 Double_t thetaX, thetaY, pYZ;
113 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
114 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
115 Int_t fCharge, fCharge2;
117 Int_t ntrackhits, nevents;
122 TLorentzVector fV1, fV2, fVtot;
125 AliMagF::SetReadField(kFALSE);
127 // open run loader and load gAlice, kinematics and header
128 AliRunLoader* runLoader = AliRunLoader::Open(filename);
130 Error("MUONmass_ESD", "getting run loader from file %s failed",
136 Error("MUONmass_ESD", "no galice object found");
142 TFile* esdFile = TFile::Open(esdFileName);
143 if (!esdFile || !esdFile->IsOpen()) {
144 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
148 AliESD* esd = new AliESD();
149 TTree* tree = (TTree*) esdFile->Get("esdTree");
151 Error("CheckESD", "no ESD tree found");
154 tree->SetBranchAddress("ESD", &esd);
157 AliESDVertex* Vertex = (AliESDVertex*) esd->AliESD::GetVertex();
159 runLoader->LoadHeader();
160 nevents = runLoader->GetNumberOfEvents();
163 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
166 runLoader->GetEvent(iEvent);
168 // get the event summary data
169 tree->GetEvent(iEvent);
171 Error("CheckESD", "no ESD object found for event %d", iEvent);
175 // get the SPD reconstructed vertex (vertexer) and fill the histogram
176 fZVertex = Vertex->GetZv();
177 hPrimaryVertex->Fill(fZVertex);
179 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
181 // printf("\n Nb of events analysed: %d\r",iEvent);
182 // cout << " number of tracks: " << nTracks <<endl;
184 // loop over all reconstructed tracks (also first track of combination)
185 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
187 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack);
189 thetaX = muonTrack->GetThetaX();
190 thetaY = muonTrack->GetThetaY();
192 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
193 fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
194 fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
195 fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
196 fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
198 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
199 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
201 ntrackhits = muonTrack->GetNHit();
202 fitfmin = muonTrack->GetChi2();
204 // transverse momentum
205 Float_t pt1 = fV1.Pt();
208 Float_t p1 = fV1.P();
211 Float_t rapMuon1 = fV1.Rapidity();
214 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
215 // printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
216 // fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
218 // condition for good track (Chi2Cut and PtCut)
220 if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
222 // fill histos hPtMuon and hChi2PerDof
225 hChi2PerDof->Fill(ch1);
226 hRapMuon->Fill(rapMuon1);
228 hPtMuonPlus->Fill(pt1);
229 hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
231 hPtMuonMinus->Fill(pt1);
232 hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
234 // loop over second track of combination
235 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
237 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack2);
239 thetaX = muonTrack->GetThetaX();
240 thetaY = muonTrack->GetThetaY();
242 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
243 fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
244 fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
245 fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
246 fCharge2 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
248 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
249 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
251 ntrackhits = muonTrack->GetNHit();
252 fitfmin = muonTrack->GetChi2();
254 // transverse momentum
255 Float_t pt2 = fV2.Pt();
258 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
260 // condition for good track (Chi2Cut and PtCut)
261 if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
263 // condition for opposite charges
264 if ((fCharge * fCharge2) == -1) {
268 Float_t invMass = fVtot.M();
270 // fill histos hInvMassAll and hInvMassRes
271 hInvMassAll->Fill(invMass);
272 hInvMassRes->Fill(invMass);
273 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
276 ptTrig = 0x400;// mask for Hpt unlike sign pair
278 ptTrig = 0x200;// mask for Lpt unlike sign pair
280 if (esd->GetTrigger() & ptTrig) NbTrigger++;
281 if (invMass > massMin && invMass < massMax) {
283 if (muonTrack->GetMatchTrigger() && (esd->GetTrigger() & ptTrig))// match with trigger
286 hRapResonance->Fill(fVtot.Rapidity());
287 hPtResonance->Fill(fVtot.Pt());
290 } // if (fCharge * fCharge2) == -1)
291 } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
292 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
293 } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
294 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
296 hNumberOfTrack->Fill(nTracks);
297 // esdFile->Delete();
298 } // for (Int_t iEvent = FirstEvent;
300 // Loop over events for bg event
302 Double_t thetaPlus, phiPlus;
303 Double_t thetaMinus, phiMinus;
304 Float_t PtMinus, PtPlus;
306 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
308 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
309 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
310 PtPlus = hPtMuonPlus->GetRandom();
311 PtMinus = hPtMuonMinus->GetRandom();
313 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
314 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
315 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
317 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
318 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
320 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
321 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
322 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
324 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
325 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
330 // fill histos hInvMassAll and hInvMassRes
331 hInvMassBg->Fill(fVtot.M());
332 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
339 cout << "EventInMass " << EventInMass << endl;
340 cout << "NbTrigger " << NbTrigger << endl;
341 cout << "EventInMass match with trigger " << EventInMassMatch << endl;