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.);
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;
120 AliMagF::SetReadField(kFALSE);
122 // open run loader and load gAlice, kinematics and header
123 AliRunLoader* runLoader = AliRunLoader::Open(filename);
125 Error("MUONmass_ESD", "getting run loader from file %s failed",
131 Error("MUONmass_ESD", "no galice object found");
137 TFile* esdFile = TFile::Open(esdFileName);
138 if (!esdFile || !esdFile->IsOpen()) {
139 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
143 AliESD* esd = new AliESD();
144 TTree* tree = (TTree*) esdFile->Get("esdTree");
146 Error("CheckESD", "no ESD tree found");
149 tree->SetBranchAddress("ESD", &esd);
151 runLoader->LoadHeader();
152 nevents = runLoader->GetNumberOfEvents();
155 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
158 runLoader->GetEvent(iEvent);
160 // get the event summary data
161 tree->GetEvent(iEvent);
163 Error("CheckESD", "no ESD object found for event %d", iEvent);
167 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
169 // printf("\n Nb of events analysed: %d\r",iEvent);
170 // cout << " number of tracks: " << nTracks <<endl;
172 // loop over all reconstructed tracks (also first track of combination)
173 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
175 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack);
177 thetaX = muonTrack->GetThetaX();
178 thetaY = muonTrack->GetThetaY();
180 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
181 fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
182 fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
183 fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
184 fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
186 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
187 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
189 ntrackhits = muonTrack->GetNHit();
190 fitfmin = muonTrack->GetChi2();
192 // transverse momentum
193 Float_t pt1 = fV1.Pt();
196 Float_t p1 = fV1.P();
199 Float_t rapMuon1 = fV1.Rapidity();
202 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
203 // printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
204 // fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
206 // condition for good track (Chi2Cut and PtCut)
208 if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
210 // fill histos hPtMuon and hChi2PerDof
213 hChi2PerDof->Fill(ch1);
214 hRapMuon->Fill(rapMuon1);
216 hPtMuonPlus->Fill(pt1);
217 hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
219 hPtMuonMinus->Fill(pt1);
220 hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
222 // loop over second track of combination
223 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
225 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack2);
227 thetaX = muonTrack->GetThetaX();
228 thetaY = muonTrack->GetThetaY();
230 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
231 fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
232 fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
233 fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
234 fCharge2 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
236 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
237 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
239 ntrackhits = muonTrack->GetNHit();
240 fitfmin = muonTrack->GetChi2();
242 // transverse momentum
243 Float_t pt2 = fV2.Pt();
246 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
248 // condition for good track (Chi2Cut and PtCut)
249 if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
251 // condition for opposite charges
252 if ((fCharge * fCharge2) == -1) {
256 Float_t invMass = fVtot.M();
258 // fill histos hInvMassAll and hInvMassRes
259 hInvMassAll->Fill(invMass);
260 hInvMassRes->Fill(invMass);
261 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
262 if (invMass > massMin && invMass < massMax) {
264 hRapResonance->Fill(fVtot.Rapidity());
265 hPtResonance->Fill(fVtot.Pt());
268 } // if (fCharge * fCharge2) == -1)
269 } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
270 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
271 } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
272 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
274 hNumberOfTrack->Fill(nTracks);
275 // esdFile->Delete();
276 } // for (Int_t iEvent = FirstEvent;
278 // Loop over events for bg event
280 Double_t thetaPlus, phiPlus;
281 Double_t thetaMinus, phiMinus;
282 Float_t PtMinus, PtPlus;
284 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
286 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
287 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
288 PtPlus = hPtMuonPlus->GetRandom();
289 PtMinus = hPtMuonMinus->GetRandom();
291 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
292 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
293 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
295 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
296 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
298 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
299 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
300 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
302 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
303 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
308 // fill histos hInvMassAll and hInvMassRes
309 hInvMassBg->Fill(fVtot.M());
310 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
316 cout << "MUONmassPlot " << endl;
317 cout << "FirstEvent " << FirstEvent << endl;
318 cout << "LastEvent " << LastEvent << endl;
319 cout << "ResType " << ResType << endl;
320 cout << "Chi2Cut " << Chi2Cut << endl;
321 cout << "PtCutMin " << PtCutMin << endl;
322 cout << "PtCutMax " << PtCutMax << endl;
323 cout << "massMin " << massMin << endl;
324 cout << "massMax " << massMax << endl;
325 cout << "EventInMass " << EventInMass << endl;