[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>
#include <TROOT.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 "AliESDEvent.h"
#include "AliESDVertex.h"
#include "AliTracker.h"

// MUON includes
#include "AliMUONTrackParam.h"
#include "AliMUONTrackExtrap.h"
#include "AliESDMuonTrack.h"
#endif

/// \ingroup macros
/// \file MUONmassPlot_ESD.C
/// \brief Macro MUONefficiency.C for ESD
///
/// \author 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.
///
/// Add parameters and histograms for analysis 

Bool_t MUONmassPlot(char* filename = "generated/galice.root", Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.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)
{
/// \param ExtrapToVertex (default -1)
///   -	<0: no extrapolation;
///   -	=0: extrapolation to (0,0,0);
///   -	>0: extrapolation to ESDVertex if available, else to (0,0,0)
/// \param FirstEvent (default 0)
/// \param LastEvent (default 0)
/// \param ResType    553 for Upsilon, anything else for J/Psi (default 553)
/// \param Chi2Cut    to keep only tracks with chi2 per d.o.f. < Chi2Cut (default 100)
/// \param PtCutMin   to keep only tracks with transverse momentum > PtCutMin (default 1)
/// \param PtCutMax   to keep only tracks with transverse momentum < PtCutMax (default 10000)
/// \param massMin   (default 9.17 for Upsilon) 
/// \param massMax   (default 9.77 for Upsilon);  
///         to calculate the reconstruction efficiency for resonances with invariant mass
///         massMin < mass < massMax.

  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;
  Double_t errXVtx=0;
  Double_t errYVtx=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;
  }
/*  
  runLoader->LoadgAlice();
  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;
  }
  
  AliESDEvent* esd = new AliESDEvent();
  TTree* tree = (TTree*) esdFile->Get("esdTree");
  if (!tree) {
    Error("CheckESD", "no ESD tree found");
    return kFALSE;
  }
//  tree->SetBranchAddress("ESD", &esd);
  esd->ReadFromTree(tree);
  

  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();
      errXVtx = Vertex->GetXRes();
      errYVtx = Vertex->GetYRes();
    }
    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, errXVtx, errYVtx);
	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., 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, errXVtx, errYVtx);
	    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., 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>
21939432	14	#include <TROOT.h>
5473f16a	15
	16	// STEER includes
	17	#include "AliRun.h"
0ff94351	18	#include "AliLog.h"
5473f16a	19	#include "AliRunLoader.h"
	20	#include "AliHeader.h"
	21	#include "AliLoader.h"
	22	#include "AliStack.h"
0ff94351	23	#include "AliMagFMaps.h"
1c2bdf00	24	#include "AliESDEvent.h"
995a61aa	25	#include "AliESDVertex.h"
0ff94351	26	#include "AliTracker.h"
5473f16a	27
5473f16a	28	// MUON includes
211c52eb	29	#include "AliMUONTrackParam.h"
37827b29	30	#include "AliMUONTrackExtrap.h"
5473f16a	31	#include "AliESDMuonTrack.h"
5473f16a	32	#endif
5473f16a	33
e54bf126	34	/// \ingroup macros
	35	/// \file MUONmassPlot_ESD.C
	36	/// \brief Macro MUONefficiency.C for ESD
	37	///
	38	/// \author Ch. Finck, Subatech, April. 2004
	39	///
	40	///
	41	/// Macro to make invariant mass plots
	42	/// for combinations of 2 muons with opposite charges,
	43	/// from root file "MUON.tracks.root" containing the result of track reconstruction.
	44	/// Histograms are stored on the "MUONmassPlot.root" file.
	45	/// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
	46	/// using Invariant Mass for rapidity.
	47	///
	48	/// Add parameters and histograms for analysis
5473f16a	49
690d2205	50	Bool_t MUONmassPlot(char* filename = "generated/galice.root", Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root",
8cde4af5	51	Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553,
5473f16a	52	Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
	53	Float_t massMin = 9.17,Float_t massMax = 9.77)
	54	{
e54bf126	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 FirstEvent (default 0)
	60	/// \param LastEvent (default 0)
	61	/// \param ResType 553 for Upsilon, anything else for J/Psi (default 553)
	62	/// \param Chi2Cut to keep only tracks with chi2 per d.o.f. < Chi2Cut (default 100)
	63	/// \param PtCutMin to keep only tracks with transverse momentum > PtCutMin (default 1)
	64	/// \param PtCutMax to keep only tracks with transverse momentum < PtCutMax (default 10000)
	65	/// \param massMin (default 9.17 for Upsilon)
	66	/// \param massMax (default 9.77 for Upsilon);
	67	/// to calculate the reconstruction efficiency for resonances with invariant mass
	68	/// massMin < mass < massMax.
	69
5473f16a	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;
690d2205	130	Double_t errXVtx=0;
690d2205	131	Double_t errYVtx=0;
5473f16a	132
5473f16a	133	TLorentzVector fV1, fV2, fVtot;
cb75342e	134
8cde4af5	135	// Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
	136	if (!gGeoManager) {
	137	TGeoManager::Import(geoFilename);
	138	if (!gGeoManager) {
	139	Error("MUONmass_ESD", "getting geometry from file %s failed", filename);
	140	return kFALSE;
	141	}
	142	}
	143
0ff94351	144	// set mag field
	145	// waiting for mag field in CDB
	146	printf("Loading field map...\n");
b97b210c	147	AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
0ff94351	148	AliTracker::SetFieldMap(field, kFALSE);
cb75342e	149
5473f16a	150	// open run loader and load gAlice, kinematics and header
	151	AliRunLoader* runLoader = AliRunLoader::Open(filename);
	152	if (!runLoader) {
8cde4af5	153	Error("MUONmass_ESD", "getting run loader from file %s failed", filename);
5473f16a	154	return kFALSE;
5473f16a	155	}
6b092dfc	156	/*
6b092dfc	157	runLoader->LoadgAlice();
5473f16a	158	if (!gAlice) {
	159	Error("MUONmass_ESD", "no galice object found");
	160	return kFALSE;
	161	}
6b092dfc	162	*/
5473f16a	163
	164	// open the ESD file
	165	TFile* esdFile = TFile::Open(esdFileName);
	166	if (!esdFile \|\| !esdFile->IsOpen()) {
	167	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	168	return kFALSE;
	169	}
	170
1c2bdf00	171	AliESDEvent* esd = new AliESDEvent();
48d6b312	172	TTree* tree = (TTree*) esdFile->Get("esdTree");
	173	if (!tree) {
	174	Error("CheckESD", "no ESD tree found");
	175	return kFALSE;
	176	}
8b4a9b89	177	// tree->SetBranchAddress("ESD", &esd);
8b4a9b89	178	esd->ReadFromTree(tree);
f9ebb3bd	179
48d6b312	180
5473f16a	181	runLoader->LoadHeader();
5473f16a	182	nevents = runLoader->GetNumberOfEvents();
211c52eb	183
211c52eb	184	AliMUONTrackParam trackParam;
0ff94351	185
5473f16a	186	// Loop over events
	187	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	188
	189	// get current event
	190	runLoader->GetEvent(iEvent);
48d6b312	191
5473f16a	192	// get the event summary data
48d6b312	193	tree->GetEvent(iEvent);
5473f16a	194	if (!esd) {
48d6b312	195	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	196	return kFALSE;
	197	}
	198
f9ebb3bd	199	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	200	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8	201	if (Vertex->GetNContributors()) {
211c52eb	202	fZVertex = Vertex->GetZv();
	203	fYVertex = Vertex->GetYv();
	204	fXVertex = Vertex->GetXv();
690d2205	205	errXVtx = Vertex->GetXRes();
690d2205	206	errYVtx = Vertex->GetYRes();
211c52eb	207	}
f9ebb3bd	208	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	209
48d6b312	210	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	211
5473f16a	212	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	213	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	214
37827b29	215	// set the magnetic field for track extrapolations
37827b29	216	AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
5473f16a	217	// loop over all reconstructed tracks (also first track of combination)
	218	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	219
8cde4af5	220	AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a	221
8cde4af5	222	// extrapolate to vertex if required and available
8cde4af5	223	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	224	trackParam.GetParamFromUncorrected(*muonTrack);
690d2205	225	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
8cde4af5	226	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	227	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	228	trackParam.GetParamFromUncorrected(*muonTrack);
690d2205	229	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
8cde4af5	230	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	231	}
8cde4af5	232
22ccc301	233	fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	234
	235	muonTrack->LorentzP(fV1);
8cde4af5	236
5473f16a	237	ntrackhits = muonTrack->GetNHit();
	238	fitfmin = muonTrack->GetChi2();
	239
	240	// transverse momentum
	241	Float_t pt1 = fV1.Pt();
	242
	243	// total momentum
	244	Float_t p1 = fV1.P();
	245
	246	// Rapidity
	247	Float_t rapMuon1 = fV1.Rapidity();
	248
	249	// chi2 per d.o.f.
	250	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	251	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
22ccc301	252	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
5473f16a	253
	254	// condition for good track (Chi2Cut and PtCut)
	255
	256	if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
	257
	258	// fill histos hPtMuon and hChi2PerDof
	259	hPtMuon->Fill(pt1);
	260	hPMuon->Fill(p1);
	261	hChi2PerDof->Fill(ch1);
	262	hRapMuon->Fill(rapMuon1);
22ccc301	263	if (fCharge1 > 0) {
ac3c5325	264	hPtMuonPlus->Fill(pt1);
22ccc301	265	hThetaPhiPlus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	266	} else {
ac3c5325	267	hPtMuonMinus->Fill(pt1);
22ccc301	268	hThetaPhiMinus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	269	}
5473f16a	270	// loop over second track of combination
	271	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	272
8cde4af5	273	AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	274
	275	// extrapolate to vertex if required and available
	276	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	277	trackParam.GetParamFromUncorrected(*muonTrack2);
690d2205	278	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
8cde4af5	279	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	280	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	281	trackParam.GetParamFromUncorrected(*muonTrack2);
690d2205	282	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
8cde4af5	283	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	284	}
8cde4af5	285
8cde4af5	286	fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a	287
22ccc301	288	muonTrack2->LorentzP(fV2);
5473f16a	289
8cde4af5	290	ntrackhits = muonTrack2->GetNHit();
8cde4af5	291	fitfmin = muonTrack2->GetChi2();
5473f16a	292
	293	// transverse momentum
	294	Float_t pt2 = fV2.Pt();
	295
	296	// chi2 per d.o.f.
	297	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	298
	299	// condition for good track (Chi2Cut and PtCut)
	300	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	301
	302	// condition for opposite charges
22ccc301	303	if ((fCharge1 * fCharge2) == -1) {
5473f16a	304
	305	// invariant mass
	306	fVtot = fV1 + fV2;
	307	Float_t invMass = fVtot.M();
	308
	309	// fill histos hInvMassAll and hInvMassRes
	310	hInvMassAll->Fill(invMass);
	311	hInvMassRes->Fill(invMass);
ac3c5325	312	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	313	Int_t ptTrig;
6678cd54	314	if (ResType == 553)
8d4fefab	315	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	316	else
8d4fefab	317	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	318
f57d136a	319	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	320	if (invMass > massMin && invMass < massMax) {
5473f16a	321	EventInMass++;
8cde4af5	322	if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	323	EventInMassMatch++;
6678cd54	324
5473f16a	325	hRapResonance->Fill(fVtot.Rapidity());
	326	hPtResonance->Fill(fVtot.Pt());
	327	}
	328
22ccc301	329	} // if (fCharge1 * fCharge2) == -1)
5473f16a	330	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5	331	delete muonTrack2;
5473f16a	332	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
5473f16a	333	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5	334	delete muonTrack;
5473f16a	335	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	336
	337	hNumberOfTrack->Fill(nTracks);
48d6b312	338	// esdFile->Delete();
5473f16a	339	} // for (Int_t iEvent = FirstEvent;
5473f16a	340
ac3c5325	341	// Loop over events for bg event
	342
	343	Double_t thetaPlus, phiPlus;
	344	Double_t thetaMinus, phiMinus;
	345	Float_t PtMinus, PtPlus;
	346
	347	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	348
	349	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	350	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	351	PtPlus = hPtMuonPlus->GetRandom();
	352	PtMinus = hPtMuonMinus->GetRandom();
	353
	354	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	355	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	356	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	357
	358	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	359	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	360
	361	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	362	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	363	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	364
	365	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	366	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	367
	368	// invariant mass
	369	fVtot = fV1 + fV2;
	370
	371	// fill histos hInvMassAll and hInvMassRes
	372	hInvMassBg->Fill(fVtot.M());
	373	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	374	}
	375
5473f16a	376	histoFile->Write();
	377	histoFile->Close();
	378
6678cd54	379	cout << endl;
5473f16a	380	cout << "EventInMass " << EventInMass << endl;
6678cd54	381	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	382	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	383
	384	return kTRUE;
	385	}
	386