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
76 // File for histograms and histogram booking
77 TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
78 TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
79 TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
80 TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
81 TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
82 TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
83 TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
84 TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
85 TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
86 TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
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 Float_t muonMass = 0.105658389;
106 // Float_t UpsilonMass = 9.46037;
107 // Float_t JPsiMass = 3.097;
109 Double_t thetaX, thetaY, pYZ;
110 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
111 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
112 Int_t fCharge, fCharge2;
114 Int_t ntrackhits, nevents;
118 TLorentzVector fV1, fV2, fVtot;
121 AliMagF::SetReadField(kFALSE);
123 // open run loader and load gAlice, kinematics and header
124 AliRunLoader* runLoader = AliRunLoader::Open(filename);
126 Error("MUONmass_ESD", "getting run loader from file %s failed",
131 runLoader->LoadgAlice();
132 gAlice = runLoader->GetAliRun();
134 Error("MUONmass_ESD", "no galice object found");
140 TFile* esdFile = TFile::Open(esdFileName);
141 if (!esdFile || !esdFile->IsOpen()) {
142 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
146 AliESD* esd = new AliESD();
147 TTree* tree = (TTree*) esdFile->Get("esdTree");
149 Error("CheckESD", "no ESD tree found");
152 tree->SetBranchAddress("ESD", &esd);
154 runLoader->LoadHeader();
155 nevents = runLoader->GetNumberOfEvents();
158 for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
161 runLoader->GetEvent(iEvent);
163 // get the event summary data
164 tree->GetEvent(iEvent);
166 Error("CheckESD", "no ESD object found for event %d", iEvent);
170 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
172 // printf("\n Nb of events analysed: %d\r",iEvent);
173 // cout << " number of tracks: " << nTracks <<endl;
175 // loop over all reconstructed tracks (also first track of combination)
176 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
178 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack);
180 thetaX = muonTrack->GetThetaX();
181 thetaY = muonTrack->GetThetaY();
183 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
184 fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
185 fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
186 fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
187 fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
189 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
190 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
192 ntrackhits = muonTrack->GetNHit();
193 fitfmin = muonTrack->GetChi2();
195 // transverse momentum
196 Float_t pt1 = fV1.Pt();
199 Float_t p1 = fV1.P();
202 Float_t rapMuon1 = fV1.Rapidity();
205 Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
206 // printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
207 // fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
209 // condition for good track (Chi2Cut and PtCut)
211 if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
213 // fill histos hPtMuon and hChi2PerDof
216 hChi2PerDof->Fill(ch1);
217 hRapMuon->Fill(rapMuon1);
219 hPtMuonPlus->Fill(pt1);
220 hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
222 hPtMuonMinus->Fill(pt1);
223 hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
225 // loop over second track of combination
226 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
228 AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack2);
230 thetaX = muonTrack->GetThetaX();
231 thetaY = muonTrack->GetThetaY();
233 pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
234 fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
235 fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
236 fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
237 fCharge2 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
239 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
240 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
242 ntrackhits = muonTrack->GetNHit();
243 fitfmin = muonTrack->GetChi2();
245 // transverse momentum
246 Float_t pt2 = fV2.Pt();
249 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
251 // condition for good track (Chi2Cut and PtCut)
252 if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
254 // condition for opposite charges
255 if ((fCharge * fCharge2) == -1) {
259 Float_t invMass = fVtot.M();
261 // fill histos hInvMassAll and hInvMassRes
262 hInvMassAll->Fill(invMass);
263 hInvMassRes->Fill(invMass);
264 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
265 if (invMass > massMin && invMass < massMax) {
267 hRapResonance->Fill(fVtot.Rapidity());
268 hPtResonance->Fill(fVtot.Pt());
271 } // if (fCharge * fCharge2) == -1)
272 } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
273 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
274 } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
275 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
277 hNumberOfTrack->Fill(nTracks);
278 // esdFile->Delete();
279 } // for (Int_t iEvent = FirstEvent;
281 // Loop over events for bg event
283 Double_t thetaPlus, phiPlus;
284 Double_t thetaMinus, phiMinus;
285 Float_t PtMinus, PtPlus;
287 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
289 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
290 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
291 PtPlus = hPtMuonPlus->GetRandom();
292 PtMinus = hPtMuonMinus->GetRandom();
294 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
295 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
296 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
298 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
299 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
301 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
302 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
303 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
305 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
306 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
311 // fill histos hInvMassAll and hInvMassRes
312 hInvMassBg->Fill(fVtot.M());
313 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
319 cout << "MUONmassPlot " << endl;
320 cout << "FirstEvent " << FirstEvent << endl;
321 cout << "LastEvent " << LastEvent << endl;
322 cout << "ResType " << ResType << endl;
323 cout << "Chi2Cut " << Chi2Cut << endl;
324 cout << "PtCutMin " << PtCutMin << endl;
325 cout << "PtCutMax " << PtCutMax << endl;
326 cout << "massMin " << massMin << endl;
327 cout << "massMax " << massMax << endl;
328 cout << "EventInMass " << EventInMass << endl;