]> git.uio.no Git - u/mrichter/AliRoot.git/blame_incremental - MUON/MUONmassPlot_ESD.C
git://git.uio.no / u / mrichter / AliRoot.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
coverity fix and some clean up
[u/mrichter/AliRoot.git] / MUON / MUONmassPlot_ESD.C
... / ...
CommitLineData
1#if !defined(__CINT__) || defined(__MAKECINT__)
2// ROOT includes
3#include "TTree.h"
4#include "TBranch.h"
5#include "TClonesArray.h"
6#include "TLorentzVector.h"
7#include "TFile.h"
8#include "TH1.h"
9#include "TH2.h"
10#include "TParticle.h"
11#include "TTree.h"
12#include <Riostream.h>
13#include <TGeoManager.h>
14#include <TROOT.h>
15
16// STEER includes
17#include "AliLog.h"
18#include "AliCDBManager.h"
19#include "AliESDEvent.h"
20#include "AliESDVertex.h"
21#include "AliESDMuonTrack.h"
22
23// MUON includes
24#include "AliMUONCDB.h"
25#include "AliMUONTrackParam.h"
26#include "AliMUONTrackExtrap.h"
27#include "AliMUONESDInterface.h"
28#include "AliMUONConstants.h"
29#endif
30
31/// \ingroup macros
32/// \file MUONmassPlot_ESD.C
33/// \brief Macro MUONmassPlot_ESD.C for ESD
34///
35/// \author Ch. Finck, Subatech, April. 2004
36///
37///
38/// Macro to make invariant mass plots
39/// for combinations of 2 muons with opposite charges,
40/// from root file "MUON.tracks.root" containing the result of track reconstruction.
41/// Histograms are stored on the "MUONmassPlot.root" file.
42/// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
43/// using Invariant Mass for rapidity.
44///
45/// Add parameters and histograms for analysis
46
47Bool_t MUONmassPlot(const char* esdFileName = "AliESDs.root", const char* geoFilename = "geometry.root",
48 const char* ocdbPath = "local://$ALICE_ROOT/OCDB",
49 Int_t FirstEvent = 0, Int_t LastEvent = -1, Int_t ExtrapToVertex = -1,
50 Int_t ResType = 553, Float_t Chi2Cut = 100., Float_t PtCutMin = 1.,
51 Float_t PtCutMax = 10000., Float_t massMin = 9.17,Float_t massMax = 9.77)
52{
53 /// \param FirstEvent (default 0)
54 /// \param LastEvent (default 10000)
55 /// \param ExtrapToVertex (default -1)
56 /// - <0: no extrapolation;
57 /// - =0: extrapolation to (0,0,0);
58 /// - >0: extrapolation to ESDVertex if available, else to (0,0,0)
59 /// \param ResType 553 for Upsilon, anything else for J/Psi (default 553)
60 /// \param Chi2Cut to keep only tracks with chi2 per d.o.f. < Chi2Cut (default 100)
61 /// \param PtCutMin to keep only tracks with transverse momentum > PtCutMin (default 1)
62 /// \param PtCutMax to keep only tracks with transverse momentum < PtCutMax (default 10000)
63 /// \param massMin (default 9.17 for Upsilon)
64 /// \param massMax (default 9.77 for Upsilon);
65 /// to calculate the reconstruction efficiency for resonances with invariant mass
66 /// massMin < mass < massMax.
67
68 cout << "MUONmassPlot " << endl;
69 cout << "FirstEvent " << FirstEvent << endl;
70 cout << "LastEvent " << ((LastEvent>=0) ? Form("%d",LastEvent) : "all") << endl;
71 cout << "ResType " << ResType << endl;
72 cout << "Chi2Cut " << Chi2Cut << endl;
73 cout << "PtCutMin " << PtCutMin << endl;
74 cout << "PtCutMax " << PtCutMax << endl;
75 cout << "massMin " << massMin << endl;
76 cout << "massMax " << massMax << endl;
77
78
79 //Reset ROOT and connect tree file
80 gROOT->Reset();
81
82 // File for histograms and histogram booking
83 TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
84 TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
85 TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
86 TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
87 TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
88 TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
89 TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
90 TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
91 TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
92 TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
93 TH1F *hInvMassRes;
94 TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
95
96 if (ResType == 553) {
97 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
98 } else {
99 hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
100 }
101
102 TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
103 TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
104 TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
105 TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
106 TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
107 TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
108
109
110 // settings
111 Int_t EventInMass = 0;
112 Int_t EventInMassMatch = 0;
113 Int_t NbTrigger = 0;
114
115 Float_t muonMass = 0.105658389;
116// Float_t UpsilonMass = 9.46037;
117// Float_t JPsiMass = 3.097;
118
119 Int_t fCharge1, fCharge2;
120 Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
121 Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
122
123 Int_t ntrackhits;
124 Double_t fitfmin;
125 Double_t fZVertex=0;
126 Double_t fYVertex=0;
127 Double_t fXVertex=0;
128 Double_t errXVtx=0;
129 Double_t errYVtx=0;
130
131 TLorentzVector fV1, fV2, fVtot;
132
133 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
134 if (!gGeoManager) {
135 TGeoManager::Import(geoFilename);
136 if (!gGeoManager) {
137 Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
138 return kFALSE;
139 }
140 }
141
142 // open the ESD file
143 TFile* esdFile = TFile::Open(esdFileName);
144 if (!esdFile || !esdFile->IsOpen()) {
145 Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
146 return kFALSE;
147 }
148 AliESDEvent* esd = new AliESDEvent();
149 TTree* tree = (TTree*) esdFile->Get("esdTree");
150 if (!tree) {
151 Error("MUONmass_ESD", "no ESD tree found");
152 return kFALSE;
153 }
154 esd->ReadFromTree(tree);
155
156 // get run number
157 if (tree->GetEvent(0) <= 0) {
158 Error("MUONmass_ESD", "no ESD object found for event 0");
159 return kFALSE;
160 }
161 Int_t runNumber = esd->GetRunNumber();
162
163 // load necessary data from OCDB
164 AliCDBManager::Instance()->SetDefaultStorage(ocdbPath);
165 AliCDBManager::Instance()->SetSpecificStorage("GRP/GRP/Data","local://.");
166 AliCDBManager::Instance()->SetRun(runNumber);
167 if (!AliMUONCDB::LoadField()) return kFALSE;
168
169 // set the magnetic field for track extrapolations
170 AliMUONTrackExtrap::SetField();
171
172 AliMUONTrackParam trackParam;
173 AliMUONTrackParam trackParamAtAbsEnd;
174
175 // Loop over events
176 Int_t nevents = (LastEvent >= 0) ? TMath::Min(LastEvent, (Int_t)tree->GetEntries()-1) : (Int_t)tree->GetEntries()-1;
177 for (Int_t iEvent = FirstEvent; iEvent <= nevents; iEvent++) {
178
179 // get the event summary data
180 if (tree->GetEvent(iEvent) <= 0) {
181 Error("MUONmass_ESD", "no ESD object found for event %d", iEvent);
182 return kFALSE;
183 }
184
185 // get the SPD reconstructed vertex (vertexer) and fill the histogram
186 AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
187 if (Vertex->GetNContributors()) {
188 fZVertex = Vertex->GetZ();
189 fYVertex = Vertex->GetY();
190 fXVertex = Vertex->GetX();
191 errXVtx = Vertex->GetXRes();
192 errYVtx = Vertex->GetYRes();
193 }
194 hPrimaryVertex->Fill(fZVertex);
195
196 Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
197
198 // printf("\n Nb of events analysed: %d\r",iEvent);
199 // cout << " number of tracks: " << nTracks <<endl;
200
201 // loop over all reconstructed tracks (also first track of combination)
202 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
203
204 // skip ghosts
205 if (!esd->GetMuonTrack(iTrack)->ContainTrackerData()) continue;
206
207 AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
208
209 // extrapolate to vertex if required and available
210 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
211 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
212 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
213 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
214 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
215 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
216 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
217 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
218 }
219
220 // compute track position at the end of the absorber
221 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParamAtAbsEnd);
222 AliMUONTrackExtrap::ExtrapToZ(&trackParamAtAbsEnd, AliMUONConstants::AbsZEnd());
223 Double_t xAbs = trackParamAtAbsEnd.GetNonBendingCoor();
224 Double_t yAbs = trackParamAtAbsEnd.GetBendingCoor();
225 Double_t dAbs1 = TMath::Sqrt(xAbs*xAbs + yAbs*yAbs);
226 Double_t aAbs1 = TMath::ATan(-dAbs1/AliMUONConstants::AbsZEnd()) * TMath::RadToDeg();
227
228 fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
229
230 muonTrack->LorentzP(fV1);
231
232 ntrackhits = muonTrack->GetNHit();
233 fitfmin = muonTrack->GetChi2();
234
235 // transverse momentum
236 Float_t pt1 = fV1.Pt();
237
238 // total momentum
239 Float_t p1 = fV1.P();
240
241 // Rapidity
242 Float_t rapMuon1 = fV1.Rapidity();
243
244 // chi2 per d.o.f.
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);
248
249 // condition for good track (Chi2Cut and PtCut)
250
251// if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
252
253 // fill histos hPtMuon and hChi2PerDof
254 hPtMuon->Fill(pt1);
255 hPMuon->Fill(p1);
256 hChi2PerDof->Fill(ch1);
257 hRapMuon->Fill(rapMuon1);
258 if (fCharge1 > 0) {
259 hPtMuonPlus->Fill(pt1);
260 hThetaPhiPlus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
261 } else {
262 hPtMuonMinus->Fill(pt1);
263 hThetaPhiMinus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
264 }
265 // loop over second track of combination
266 for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
267
268 // skip ghosts
269 if (!esd->GetMuonTrack(iTrack2)->ContainTrackerData()) continue;
270
271 AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
272
273 // extrapolate to vertex if required and available
274 if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
275 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
276 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
277 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
278 } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
279 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
280 AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
281 AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
282 }
283
284 // compute track position at the end of the absorber
285 AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParamAtAbsEnd);
286 AliMUONTrackExtrap::ExtrapToZ(&trackParamAtAbsEnd, AliMUONConstants::AbsZEnd());
287 xAbs = trackParamAtAbsEnd.GetNonBendingCoor();
288 yAbs = trackParamAtAbsEnd.GetBendingCoor();
289 Double_t dAbs2 = TMath::Sqrt(xAbs*xAbs + yAbs*yAbs);
290 Double_t aAbs2 = TMath::ATan(-dAbs2/AliMUONConstants::AbsZEnd()) * TMath::RadToDeg();
291
292 fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
293
294 muonTrack2->LorentzP(fV2);
295
296 ntrackhits = muonTrack2->GetNHit();
297 fitfmin = muonTrack2->GetChi2();
298
299 // transverse momentum
300 Float_t pt2 = fV2.Pt();
301
302 // chi2 per d.o.f.
303 Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
304
305 // condition for good track (Chi2Cut and PtCut)
306// if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
307// if (aAbs1 < 2. || aAbs2 < 2.) {
308// if (aAbs1 > 2. && aAbs2 > 2. && (aAbs1 < 2.1 || aAbs2 < 2.1)) {
309// if (aAbs1 > 2. && aAbs2 > 2. && (dAbs1 < 17.8 || dAbs2 < 17.8)) {
310// if (dAbs1 > 17.8 && dAbs2 > 17.8 && (dAbs1 < 18. || dAbs2 < 18.)) {
311// if (dAbs1 > 18. && dAbs2 > 18. && (dAbs1 < 18.2 || dAbs2 < 18.2)) {
312// if (dAbs1 > 18.2 && dAbs2 > 18.2 && (aAbs1 < 2.1 || aAbs2 < 2.1)) {
313// if (dAbs1 > 18. && dAbs2 > 18.) {
314// if (aAbs1 > 2.1 && aAbs2 > 2.1) {
315// if (muonTrack->GetMatchTrigger() && muonTrack2->GetMatchTrigger()) {
316
317 // condition for opposite charges
318 if ((fCharge1 * fCharge2) == -1) {
319
320 // invariant mass
321 fVtot = fV1 + fV2;
322 Float_t invMass = fVtot.M();
323
324 // fill histos hInvMassAll and hInvMassRes
325 hInvMassAll->Fill(invMass);
326 hInvMassRes->Fill(invMass);
327 hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
328 Int_t ptTrig;
329 if (ResType == 553)
330 ptTrig = 0x20;// mask for Hpt unlike sign pair
331 else
332 ptTrig = 0x10;// mask for Lpt unlike sign pair
333
334 if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
335 if (invMass > massMin && invMass < massMax) {
336 EventInMass++;
337 if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
338 EventInMassMatch++;
339
340 hRapResonance->Fill(fVtot.Rapidity());
341 hPtResonance->Fill(fVtot.Pt());
342 }
343
344 } // if (fCharge1 * fCharge2) == -1)
345// } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
346 delete muonTrack2;
347 } // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
348// } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
349 delete muonTrack;
350 } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
351
352 hNumberOfTrack->Fill(nTracks);
353 // esdFile->Delete();
354 } // for (Int_t iEvent = FirstEvent;
355
356// Loop over events for bg event
357
358 Double_t thetaPlus, phiPlus;
359 Double_t thetaMinus, phiMinus;
360 Float_t PtMinus, PtPlus;
361
362 for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
363
364 hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
365 hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
366 PtPlus = hPtMuonPlus->GetRandom();
367 PtMinus = hPtMuonMinus->GetRandom();
368
369 fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
370 fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
371 fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
372
373 fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
374 fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
375
376 fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
377 fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
378 fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
379
380 fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
381 fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
382
383 // invariant mass
384 fVtot = fV1 + fV2;
385
386 // fill histos hInvMassAll and hInvMassRes
387 hInvMassBg->Fill(fVtot.M());
388 hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
389 }
390
391 histoFile->Write();
392 histoFile->Close();
393
394 cout << endl;
395 cout << "EventInMass " << EventInMass << endl;
396 cout << "NbTrigger " << NbTrigger << endl;
397 cout << "EventInMass match with trigger " << EventInMassMatch << endl;
398
399 return kTRUE;
400}
401