[u/mrichter/AliRoot.git] / MUON / MUONmassPlot_ESD.C

#if !defined(__CINT__) || defined(__MAKECINT__)
// ROOT includes
#include "TTree.h"
#include "TBranch.h"
#include "TClonesArray.h"
#include "TLorentzVector.h"
#include "TFile.h"
#include "TH1.h"
#include "TH2.h"
#include "TParticle.h"
#include "TTree.h"
#include <Riostream.h>
#include <TGeoManager.h>

// STEER includes
#include "AliRun.h"
#include "AliLog.h"
#include "AliRunLoader.h"
#include "AliHeader.h"
#include "AliLoader.h"
#include "AliStack.h"
#include "AliMagFMaps.h"
#include "AliESD.h"
#include "AliTracker.h"

// MUON includes
#include "AliMUONTrackParam.h"
#include "AliMUONTrackExtrap.h"
#include "AliESDMuonTrack.h"
#endif
//
// Macro MUONmassPlot.C for ESD
// Ch. Finck, Subatech, April. 2004
//

// macro to make invariant mass plots
// for combinations of 2 muons with opposite charges,
// from root file "MUON.tracks.root" containing the result of track reconstruction.
// Histograms are stored on the "MUONmassPlot.root" file.
// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
// using Invariant Mass for rapidity.

// Arguments:
//   ExtrapToVertex (default -1)
//	<0: no extrapolation;
//	=0: extrapolation to (0,0,0);
//	>0: extrapolation to ESDVertex if available, else to (0,0,0)
//   FirstEvent (default 0)
//   LastEvent (default 0)
//   ResType (default 553)
//      553 for Upsilon, anything else for J/Psi
//   Chi2Cut (default 100)
//      to keep only tracks with chi2 per d.o.f. < Chi2Cut
//   PtCutMin (default 1)
//      to keep only tracks with transverse momentum > PtCutMin
//   PtCutMax (default 10000)
//      to keep only tracks with transverse momentum < PtCutMax
//   massMin (default 9.17 for Upsilon) 
//      &  massMax (default 9.77 for Upsilon) 
//         to calculate the reconstruction efficiency for resonances with invariant mass
//         massMin < mass < massMax.

// Add parameters and histograms for analysis 

Bool_t MUONmassPlot(Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root", char* filename = "galice.root",
		  Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553, 
                  Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
                  Float_t massMin = 9.17,Float_t massMax = 9.77)
{
  cout << "MUONmassPlot " << endl;
  cout << "FirstEvent " << FirstEvent << endl;
  cout << "LastEvent " << LastEvent << endl;
  cout << "ResType " << ResType << endl;
  cout << "Chi2Cut " << Chi2Cut << endl;
  cout << "PtCutMin " << PtCutMin << endl;
  cout << "PtCutMax " << PtCutMax << endl;
  cout << "massMin " << massMin << endl;
  cout << "massMax " << massMax << endl;

 
  //Reset ROOT and connect tree file
  gROOT->Reset();

  // File for histograms and histogram booking
  TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
  TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
  TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
  TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
  TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
  TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
  TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
  TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
  TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
  TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
  TH1F *hInvMassRes;
  TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);

  if (ResType == 553) {
    hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
  } else {
    hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
  }

  TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
  TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
  TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
  TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
  TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
  TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);


  // settings
  Int_t EventInMass = 0;
  Int_t EventInMassMatch = 0;
  Int_t NbTrigger = 0;

  Float_t muonMass = 0.105658389;
//   Float_t UpsilonMass = 9.46037;
//   Float_t JPsiMass = 3.097;

  Int_t fCharge1, fCharge2;
  Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
  Double_t fPxRec2, fPyRec2, fPzRec2, fE2;

  Int_t ntrackhits, nevents;
  Double_t fitfmin;
  Double_t fZVertex=0;
  Double_t fYVertex=0;
  Double_t fXVertex=0;
 
  TLorentzVector fV1, fV2, fVtot;

  // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
  if (!gGeoManager) {
    TGeoManager::Import(geoFilename);
    if (!gGeoManager) {
      Error("MUONmass_ESD", "getting geometry from file %s failed", filename);
      return kFALSE;
    }
  }
  
  // set mag field
  // waiting for mag field in CDB 
  printf("Loading field map...\n");
  AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
  AliTracker::SetFieldMap(field, kFALSE);

  // open run loader and load gAlice, kinematics and header
  AliRunLoader* runLoader = AliRunLoader::Open(filename);
  if (!runLoader) {
    Error("MUONmass_ESD", "getting run loader from file %s failed", filename);
    return kFALSE;
  }

  if (!gAlice) {
    Error("MUONmass_ESD", "no galice object found");
    return kFALSE;
  }
  

  // open the ESD file
  TFile* esdFile = TFile::Open(esdFileName);
  if (!esdFile || !esdFile->IsOpen()) {
    Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
    return kFALSE;
  }
  
  AliESD* esd = new AliESD();
  TTree* tree = (TTree*) esdFile->Get("esdTree");
  if (!tree) {
    Error("CheckESD", "no ESD tree found");
    return kFALSE;
  }
  tree->SetBranchAddress("ESD", &esd);
  
  
  runLoader->LoadHeader();
  nevents = runLoader->GetNumberOfEvents();
  
  AliMUONTrackParam trackParam;

  // Loop over events
  for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {

    // get current event
    runLoader->GetEvent(iEvent);
   
    // get the event summary data
    tree->GetEvent(iEvent);
    if (!esd) {
      Error("CheckESD", "no ESD object found for event %d", iEvent);
      return kFALSE;
    }

    // get the SPD reconstructed vertex (vertexer) and fill the histogram
    AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
    if (Vertex->GetNContributors()) {
      fZVertex = Vertex->GetZv();
      fYVertex = Vertex->GetYv();
      fXVertex = Vertex->GetXv();
    }
    hPrimaryVertex->Fill(fZVertex);

    Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ; 

    //    printf("\n Nb of events analysed: %d\r",iEvent);
    //      cout << " number of tracks: " << nTracks  <<endl;
  
    // set the magnetic field for track extrapolations
    AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
    // loop over all reconstructed tracks (also first track of combination)
    for (Int_t iTrack = 0; iTrack <  nTracks;  iTrack++) {

      AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));

      // extrapolate to vertex if required and available
      if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
        trackParam.GetParamFromUncorrected(*muonTrack);
	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
      } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
        trackParam.GetParamFromUncorrected(*muonTrack);
	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
      }

      fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
      
      muonTrack->LorentzP(fV1);
      
      ntrackhits = muonTrack->GetNHit();
      fitfmin    = muonTrack->GetChi2();

      // transverse momentum
      Float_t pt1 = fV1.Pt();

      // total momentum
      Float_t p1 = fV1.P();

      // Rapidity
      Float_t rapMuon1 = fV1.Rapidity();

      // chi2 per d.o.f.
      Float_t ch1 =  fitfmin / (2.0 * ntrackhits - 5);
//      printf(" px %f py %f pz %f NHits %d  Norm.chi2 %f charge %d\n", 
// 	     fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);

      // condition for good track (Chi2Cut and PtCut)

      if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {

	// fill histos hPtMuon and hChi2PerDof
	hPtMuon->Fill(pt1);
	hPMuon->Fill(p1);
	hChi2PerDof->Fill(ch1);
	hRapMuon->Fill(rapMuon1);
	if (fCharge1 > 0) {
	  hPtMuonPlus->Fill(pt1);
	  hThetaPhiPlus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
	} else {
	  hPtMuonMinus->Fill(pt1);
	  hThetaPhiMinus->Fill(fV1.Phi()*180./TMath::Pi(),fV1.Theta()*180./TMath::Pi());
	}
	// loop over second track of combination
	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	  
	  AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	  
	  // extrapolate to vertex if required and available
	  if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
	    trackParam.GetParamFromUncorrected(*muonTrack2);
	    AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
	    trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
	  } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
            trackParam.GetParamFromUncorrected(*muonTrack2);
	    AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
	    trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
	  }
	  
	  fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));

	  muonTrack2->LorentzP(fV2);

	  ntrackhits = muonTrack2->GetNHit();
	  fitfmin    = muonTrack2->GetChi2();

	  // transverse momentum
	  Float_t pt2 = fV2.Pt();

	  // chi2 per d.o.f.
	  Float_t ch2 = fitfmin  / (2.0 * ntrackhits - 5);

	  // condition for good track (Chi2Cut and PtCut)
	  if ((ch2 < Chi2Cut) && (pt2 > PtCutMin)  && (pt2 < PtCutMax)) {

	    // condition for opposite charges
	    if ((fCharge1 * fCharge2) == -1) {

	      // invariant mass
	      fVtot = fV1 + fV2;
	      Float_t invMass = fVtot.M();
	            
	      // fill histos hInvMassAll and hInvMassRes
	      hInvMassAll->Fill(invMass);
	      hInvMassRes->Fill(invMass);
	      hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
	      Int_t ptTrig;
	      if (ResType == 553) 
		ptTrig =  0x20;// mask for Hpt unlike sign pair
	      else 
		ptTrig =  0x10;// mask for Lpt unlike sign pair

	      if (esd->GetTriggerMask() &  ptTrig) NbTrigger++; 
	      if (invMass > massMin && invMass < massMax) {
		EventInMass++;
		if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
		  EventInMassMatch++;

  		hRapResonance->Fill(fVtot.Rapidity());
  		hPtResonance->Fill(fVtot.Pt());
	      }

	    } // if (fCharge1 * fCharge2) == -1)
	  } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
	  delete muonTrack2;
	} //  for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
      } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
      delete muonTrack;
    } // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)

    hNumberOfTrack->Fill(nTracks);
    //    esdFile->Delete();
  } // for (Int_t iEvent = FirstEvent;

// Loop over events for bg event

  Double_t thetaPlus,  phiPlus;
  Double_t thetaMinus, phiMinus;
  Float_t PtMinus, PtPlus;
  
  for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {

    hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
    hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
    PtPlus = hPtMuonPlus->GetRandom();
    PtMinus = hPtMuonMinus->GetRandom();

    fPxRec1  = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
    fPyRec1  = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
    fPzRec1  = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);

    fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
    fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);

    fPxRec2  = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
    fPyRec2  = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
    fPzRec2  = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);

    fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
    fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);

    // invariant mass
    fVtot = fV1 + fV2;
      
    // fill histos hInvMassAll and hInvMassRes
    hInvMassBg->Fill(fVtot.M());
    hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
  }

  histoFile->Write();
  histoFile->Close();

  cout << endl;
  cout << "EventInMass " << EventInMass << endl;
  cout << "NbTrigger " << NbTrigger << endl;
  cout << "EventInMass match with trigger " << EventInMassMatch << endl;

  return kTRUE;
}
Commit	Line	Data
5473f16a	1	#if !defined(__CINT__) \|\| defined(__MAKECINT__)
5473f16a	2	// ROOT includes
48d6b312	3	#include "TTree.h"
5473f16a	4	#include "TBranch.h"
	5	#include "TClonesArray.h"
	6	#include "TLorentzVector.h"
	7	#include "TFile.h"
	8	#include "TH1.h"
ac3c5325	9	#include "TH2.h"
5473f16a	10	#include "TParticle.h"
	11	#include "TTree.h"
	12	#include <Riostream.h>
8cde4af5	13	#include <TGeoManager.h>
5473f16a	14
	15	// STEER includes
	16	#include "AliRun.h"
0ff94351	17	#include "AliLog.h"
5473f16a	18	#include "AliRunLoader.h"
	19	#include "AliHeader.h"
	20	#include "AliLoader.h"
	21	#include "AliStack.h"
0ff94351	22	#include "AliMagFMaps.h"
5473f16a	23	#include "AliESD.h"
0ff94351	24	#include "AliTracker.h"
5473f16a	25
5473f16a	26	// MUON includes
211c52eb	27	#include "AliMUONTrackParam.h"
37827b29	28	#include "AliMUONTrackExtrap.h"
5473f16a	29	#include "AliESDMuonTrack.h"
	30	#endif
	31	//
	32	// Macro MUONmassPlot.C for ESD
	33	// Ch. Finck, Subatech, April. 2004
	34	//
	35
	36	// macro to make invariant mass plots
	37	// for combinations of 2 muons with opposite charges,
	38	// from root file "MUON.tracks.root" containing the result of track reconstruction.
	39	// Histograms are stored on the "MUONmassPlot.root" file.
	40	// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
	41	// using Invariant Mass for rapidity.
	42
	43	// Arguments:
8cde4af5	44	// ExtrapToVertex (default -1)
	45	// <0: no extrapolation;
	46	// =0: extrapolation to (0,0,0);
	47	// >0: extrapolation to ESDVertex if available, else to (0,0,0)
5473f16a	48	// FirstEvent (default 0)
	49	// LastEvent (default 0)
	50	// ResType (default 553)
	51	// 553 for Upsilon, anything else for J/Psi
	52	// Chi2Cut (default 100)
	53	// to keep only tracks with chi2 per d.o.f. < Chi2Cut
	54	// PtCutMin (default 1)
	55	// to keep only tracks with transverse momentum > PtCutMin
	56	// PtCutMax (default 10000)
	57	// to keep only tracks with transverse momentum < PtCutMax
	58	// massMin (default 9.17 for Upsilon)
	59	// & massMax (default 9.77 for Upsilon)
	60	// to calculate the reconstruction efficiency for resonances with invariant mass
	61	// massMin < mass < massMax.
	62
	63	// Add parameters and histograms for analysis
	64
8cde4af5	65	Bool_t MUONmassPlot(Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root", char* filename = "galice.root",
8cde4af5	66	Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553,
5473f16a	67	Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
	68	Float_t massMin = 9.17,Float_t massMax = 9.77)
	69	{
	70	cout << "MUONmassPlot " << endl;
	71	cout << "FirstEvent " << FirstEvent << endl;
	72	cout << "LastEvent " << LastEvent << endl;
	73	cout << "ResType " << ResType << endl;
	74	cout << "Chi2Cut " << Chi2Cut << endl;
	75	cout << "PtCutMin " << PtCutMin << endl;
	76	cout << "PtCutMax " << PtCutMax << endl;
	77	cout << "massMin " << massMin << endl;
	78	cout << "massMax " << massMax << endl;
	79
	80
	81	//Reset ROOT and connect tree file
	82	gROOT->Reset();
	83
5473f16a	84	// File for histograms and histogram booking
	85	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
	86	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325	87	TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
ac3c5325	88	TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a	89	TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
	90	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
	91	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325	92	TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a	93	TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
	94	TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
	95	TH1F *hInvMassRes;
6ab68e5f	96	TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a	97
	98	if (ResType == 553) {
	99	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
	100	} else {
	101	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
	102	}
	103
	104	TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
	105	TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
	106	TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
	107	TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325	108	TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
ac3c5325	109	TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a	110
	111
	112	// settings
	113	Int_t EventInMass = 0;
6678cd54	114	Int_t EventInMassMatch = 0;
	115	Int_t NbTrigger = 0;
	116
5473f16a	117	Float_t muonMass = 0.105658389;
	118	// Float_t UpsilonMass = 9.46037;
	119	// Float_t JPsiMass = 3.097;
	120
22ccc301	121	Int_t fCharge1, fCharge2;
5473f16a	122	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
5473f16a	123	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
5473f16a	124
	125	Int_t ntrackhits, nevents;
	126	Double_t fitfmin;
e3c6ae4c	127	Double_t fZVertex=0;
211c52eb	128	Double_t fYVertex=0;
211c52eb	129	Double_t fXVertex=0;
5473f16a	130
5473f16a	131	TLorentzVector fV1, fV2, fVtot;
cb75342e	132
8cde4af5	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", filename);
	138	return kFALSE;
	139	}
	140	}
	141
0ff94351	142	// set mag field
	143	// waiting for mag field in CDB
	144	printf("Loading field map...\n");
b97b210c	145	AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
0ff94351	146	AliTracker::SetFieldMap(field, kFALSE);
cb75342e	147
5473f16a	148	// open run loader and load gAlice, kinematics and header
	149	AliRunLoader* runLoader = AliRunLoader::Open(filename);
	150	if (!runLoader) {
8cde4af5	151	Error("MUONmass_ESD", "getting run loader from file %s failed", filename);
5473f16a	152	return kFALSE;
	153	}
	154
5473f16a	155	if (!gAlice) {
	156	Error("MUONmass_ESD", "no galice object found");
	157	return kFALSE;
	158	}
	159
	160
	161	// open the ESD file
	162	TFile* esdFile = TFile::Open(esdFileName);
	163	if (!esdFile \|\| !esdFile->IsOpen()) {
	164	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	165	return kFALSE;
	166	}
	167
48d6b312	168	AliESD* esd = new AliESD();
	169	TTree* tree = (TTree*) esdFile->Get("esdTree");
	170	if (!tree) {
	171	Error("CheckESD", "no ESD tree found");
	172	return kFALSE;
	173	}
	174	tree->SetBranchAddress("ESD", &esd);
f9ebb3bd	175
f9ebb3bd	176
48d6b312	177
5473f16a	178	runLoader->LoadHeader();
5473f16a	179	nevents = runLoader->GetNumberOfEvents();
211c52eb	180
211c52eb	181	AliMUONTrackParam trackParam;
0ff94351	182
5473f16a	183	// Loop over events
	184	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	185
	186	// get current event
	187	runLoader->GetEvent(iEvent);
48d6b312	188
5473f16a	189	// get the event summary data
48d6b312	190	tree->GetEvent(iEvent);
5473f16a	191	if (!esd) {
48d6b312	192	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	193	return kFALSE;
	194	}
	195
f9ebb3bd	196	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	197	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8	198	if (Vertex->GetNContributors()) {
211c52eb	199	fZVertex = Vertex->GetZv();
	200	fYVertex = Vertex->GetYv();
	201	fXVertex = Vertex->GetXv();
211c52eb	202	}
f9ebb3bd	203	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	204
48d6b312	205	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	206
5473f16a	207	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	208	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	209
37827b29	210	// set the magnetic field for track extrapolations
37827b29	211	AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
5473f16a	212	// loop over all reconstructed tracks (also first track of combination)
	213	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	214
8cde4af5	215	AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a	216
8cde4af5	217	// extrapolate to vertex if required and available
8cde4af5	218	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	219	trackParam.GetParamFromUncorrected(*muonTrack);
37827b29	220	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
8cde4af5	221	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	222	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	223	trackParam.GetParamFromUncorrected(*muonTrack);
8cde4af5	224	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
8cde4af5	225	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	226	}
8cde4af5	227
22ccc301	228	fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	229
	230	muonTrack->LorentzP(fV1);
8cde4af5	231
5473f16a	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",
22ccc301	247	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
5473f16a	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);
22ccc301	258	if (fCharge1 > 0) {
ac3c5325	259	hPtMuonPlus->Fill(pt1);
22ccc301	260	hThetaPhiPlus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	261	} else {
ac3c5325	262	hPtMuonMinus->Fill(pt1);
22ccc301	263	hThetaPhiMinus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	264	}
5473f16a	265	// loop over second track of combination
	266	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	267
8cde4af5	268	AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	269
	270	// extrapolate to vertex if required and available
	271	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	272	trackParam.GetParamFromUncorrected(*muonTrack2);
37827b29	273	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
8cde4af5	274	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	275	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	276	trackParam.GetParamFromUncorrected(*muonTrack2);
8cde4af5	277	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
8cde4af5	278	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	279	}
8cde4af5	280
8cde4af5	281	fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a	282
22ccc301	283	muonTrack2->LorentzP(fV2);
5473f16a	284
8cde4af5	285	ntrackhits = muonTrack2->GetNHit();
8cde4af5	286	fitfmin = muonTrack2->GetChi2();
5473f16a	287
	288	// transverse momentum
	289	Float_t pt2 = fV2.Pt();
	290
	291	// chi2 per d.o.f.
	292	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	293
	294	// condition for good track (Chi2Cut and PtCut)
	295	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	296
	297	// condition for opposite charges
22ccc301	298	if ((fCharge1 * fCharge2) == -1) {
5473f16a	299
	300	// invariant mass
	301	fVtot = fV1 + fV2;
	302	Float_t invMass = fVtot.M();
	303
	304	// fill histos hInvMassAll and hInvMassRes
	305	hInvMassAll->Fill(invMass);
	306	hInvMassRes->Fill(invMass);
ac3c5325	307	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	308	Int_t ptTrig;
6678cd54	309	if (ResType == 553)
8d4fefab	310	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	311	else
8d4fefab	312	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	313
f57d136a	314	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	315	if (invMass > massMin && invMass < massMax) {
5473f16a	316	EventInMass++;
8cde4af5	317	if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	318	EventInMassMatch++;
6678cd54	319
5473f16a	320	hRapResonance->Fill(fVtot.Rapidity());
	321	hPtResonance->Fill(fVtot.Pt());
	322	}
	323
22ccc301	324	} // if (fCharge1 * fCharge2) == -1)
5473f16a	325	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5	326	delete muonTrack2;
5473f16a	327	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
5473f16a	328	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5	329	delete muonTrack;
5473f16a	330	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	331
	332	hNumberOfTrack->Fill(nTracks);
48d6b312	333	// esdFile->Delete();
5473f16a	334	} // for (Int_t iEvent = FirstEvent;
5473f16a	335
ac3c5325	336	// Loop over events for bg event
	337
	338	Double_t thetaPlus, phiPlus;
	339	Double_t thetaMinus, phiMinus;
	340	Float_t PtMinus, PtPlus;
	341
	342	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	343
	344	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	345	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	346	PtPlus = hPtMuonPlus->GetRandom();
	347	PtMinus = hPtMuonMinus->GetRandom();
	348
	349	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	350	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	351	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	352
	353	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	354	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	355
	356	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	357	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	358	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	359
	360	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	361	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	362
	363	// invariant mass
	364	fVtot = fV1 + fV2;
	365
	366	// fill histos hInvMassAll and hInvMassRes
	367	hInvMassBg->Fill(fVtot.M());
	368	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	369	}
	370
5473f16a	371	histoFile->Write();
	372	histoFile->Close();
	373
6678cd54	374	cout << endl;
5473f16a	375	cout << "EventInMass " << EventInMass << endl;
6678cd54	376	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	377	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	378
	379	return kTRUE;
	380	}
	381