[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 "AliLog.h"
#include "AliCDBManager.h"
#include "AliESDEvent.h"
#include "AliESDVertex.h"
#include "AliESDMuonTrack.h"

// MUON includes
#include "AliMUONCDB.h"
#include "AliMUONTrackParam.h"
#include "AliMUONTrackExtrap.h"
#include "AliMUONESDInterface.h"
#endif

/// \ingroup macros
/// \file MUONmassPlot_ESD.C
/// \brief Macro MUONmassPlot_ESD.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(const char* esdFileName = "AliESDs.root", const char* geoFilename = "geometry.root",
		    const char* ocdbPath = "local://$ALICE_ROOT/OCDB",
		    Int_t FirstEvent = 0, Int_t LastEvent = 10000, Int_t ExtrapToVertex = -1,
		    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 FirstEvent (default 0)
  /// \param LastEvent (default 10000)
  /// \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 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;
  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", geoFilename);
      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("MUONmass_ESD", "no ESD tree found");
    return kFALSE;
  }
  esd->ReadFromTree(tree);
  
  // get run number
  if (tree->GetEvent(0) <= 0) {
    Error("MUONmass_ESD", "no ESD object found for event 0");
    return kFALSE;
  }
  Int_t runNumber = esd->GetRunNumber();
  
  // load necessary data from OCDB
  AliCDBManager::Instance()->SetDefaultStorage(ocdbPath);
  AliCDBManager::Instance()->SetRun(runNumber);
  if (!AliMUONCDB::LoadField()) return kFALSE;
  
  // set the magnetic field for track extrapolations
  AliMUONTrackExtrap::SetField();
  
  AliMUONTrackParam trackParam;

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

    // get the event summary data
    if (tree->GetEvent(iEvent) <= 0) {
      Error("MUONmass_ESD", "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;
  
    // loop over all reconstructed tracks (also first track of combination)
    for (Int_t iTrack = 0; iTrack <  nTracks;  iTrack++) {

      // skip ghosts
      if (!esd->GetMuonTrack(iTrack)->ContainTrackerData()) continue;
      
      AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));

      // extrapolate to vertex if required and available
      if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
	AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
	AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
      } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
	AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
	AliMUONESDInterface::SetParamAtVertex(trackParam, *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++) {
	  
	  // skip ghosts
	  if (!esd->GetMuonTrack(iTrack2)->ContainTrackerData()) continue;
	  
	  AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	  
	  // extrapolate to vertex if required and available
	  if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
	    AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
	    AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
	    AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
	  } else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) || ExtrapToVertex == 0){
	    AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
	    AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
	    AliMUONESDInterface::SetParamAtVertex(trackParam, *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
5473f16a	16	// STEER includes
0ff94351	17	#include "AliLog.h"
a99c3449	18	#include "AliCDBManager.h"
1c2bdf00	19	#include "AliESDEvent.h"
995a61aa	20	#include "AliESDVertex.h"
103e6575	21	#include "AliESDMuonTrack.h"
5473f16a	22
5473f16a	23	// MUON includes
a99c3449	24	#include "AliMUONCDB.h"
211c52eb	25	#include "AliMUONTrackParam.h"
37827b29	26	#include "AliMUONTrackExtrap.h"
103e6575	27	#include "AliMUONESDInterface.h"
5473f16a	28	#endif
5473f16a	29
e54bf126	30	/// \ingroup macros
e54bf126	31	/// \file MUONmassPlot_ESD.C
a99c3449	32	/// \brief Macro MUONmassPlot_ESD.C for ESD
e54bf126	33	///
	34	/// \author Ch. Finck, Subatech, April. 2004
	35	///
	36	///
	37	/// Macro to make invariant mass plots
	38	/// for combinations of 2 muons with opposite charges,
	39	/// from root file "MUON.tracks.root" containing the result of track reconstruction.
	40	/// Histograms are stored on the "MUONmassPlot.root" file.
	41	/// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
	42	/// using Invariant Mass for rapidity.
	43	///
	44	/// Add parameters and histograms for analysis
5473f16a	45
a99c3449	46	Bool_t MUONmassPlot(const char* esdFileName = "AliESDs.root", const char* geoFilename = "geometry.root",
	47	const char* ocdbPath = "local://$ALICE_ROOT/OCDB",
	48	Int_t FirstEvent = 0, Int_t LastEvent = 10000, Int_t ExtrapToVertex = -1,
	49	Int_t ResType = 553, Float_t Chi2Cut = 100., Float_t PtCutMin = 1.,
	50	Float_t PtCutMax = 10000., Float_t massMin = 9.17,Float_t massMax = 9.77)
5473f16a	51	{
a99c3449	52	/// \param FirstEvent (default 0)
	53	/// \param LastEvent (default 10000)
	54	/// \param ExtrapToVertex (default -1)
	55	/// - <0: no extrapolation;
	56	/// - =0: extrapolation to (0,0,0);
	57	/// - >0: extrapolation to ESDVertex if available, else to (0,0,0)
	58	/// \param ResType 553 for Upsilon, anything else for J/Psi (default 553)
	59	/// \param Chi2Cut to keep only tracks with chi2 per d.o.f. < Chi2Cut (default 100)
	60	/// \param PtCutMin to keep only tracks with transverse momentum > PtCutMin (default 1)
	61	/// \param PtCutMax to keep only tracks with transverse momentum < PtCutMax (default 10000)
	62	/// \param massMin (default 9.17 for Upsilon)
	63	/// \param massMax (default 9.77 for Upsilon);
	64	/// to calculate the reconstruction efficiency for resonances with invariant mass
	65	/// massMin < mass < massMax.
e54bf126	66
5473f16a	67	cout << "MUONmassPlot " << endl;
	68	cout << "FirstEvent " << FirstEvent << endl;
	69	cout << "LastEvent " << LastEvent << endl;
	70	cout << "ResType " << ResType << endl;
	71	cout << "Chi2Cut " << Chi2Cut << endl;
	72	cout << "PtCutMin " << PtCutMin << endl;
	73	cout << "PtCutMax " << PtCutMax << endl;
	74	cout << "massMin " << massMin << endl;
	75	cout << "massMax " << massMax << endl;
	76
	77
	78	//Reset ROOT and connect tree file
	79	gROOT->Reset();
	80
5473f16a	81	// File for histograms and histogram booking
	82	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
	83	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325	84	TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
ac3c5325	85	TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a	86	TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
	87	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
	88	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325	89	TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a	90	TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
	91	TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
	92	TH1F *hInvMassRes;
6ab68e5f	93	TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a	94
	95	if (ResType == 553) {
	96	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
	97	} else {
	98	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
	99	}
	100
	101	TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
	102	TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
	103	TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
	104	TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325	105	TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
ac3c5325	106	TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a	107
	108
	109	// settings
	110	Int_t EventInMass = 0;
6678cd54	111	Int_t EventInMassMatch = 0;
	112	Int_t NbTrigger = 0;
	113
5473f16a	114	Float_t muonMass = 0.105658389;
	115	// Float_t UpsilonMass = 9.46037;
	116	// Float_t JPsiMass = 3.097;
	117
22ccc301	118	Int_t fCharge1, fCharge2;
5473f16a	119	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
5473f16a	120	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
5473f16a	121
a99c3449	122	Int_t ntrackhits;
5473f16a	123	Double_t fitfmin;
e3c6ae4c	124	Double_t fZVertex=0;
211c52eb	125	Double_t fYVertex=0;
211c52eb	126	Double_t fXVertex=0;
690d2205	127	Double_t errXVtx=0;
690d2205	128	Double_t errYVtx=0;
5473f16a	129
5473f16a	130	TLorentzVector fV1, fV2, fVtot;
a99c3449	131
8cde4af5	132	// Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
	133	if (!gGeoManager) {
	134	TGeoManager::Import(geoFilename);
	135	if (!gGeoManager) {
cec5541f	136	Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
8cde4af5	137	return kFALSE;
	138	}
	139	}
	140
5473f16a	141	// open the ESD file
	142	TFile* esdFile = TFile::Open(esdFileName);
	143	if (!esdFile \|\| !esdFile->IsOpen()) {
	144	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	145	return kFALSE;
	146	}
1c2bdf00	147	AliESDEvent* esd = new AliESDEvent();
48d6b312	148	TTree* tree = (TTree*) esdFile->Get("esdTree");
48d6b312	149	if (!tree) {
a99c3449	150	Error("MUONmass_ESD", "no ESD tree found");
48d6b312	151	return kFALSE;
48d6b312	152	}
8b4a9b89	153	esd->ReadFromTree(tree);
f9ebb3bd	154
a99c3449	155	// get run number
	156	if (tree->GetEvent(0) <= 0) {
	157	Error("MUONmass_ESD", "no ESD object found for event 0");
	158	return kFALSE;
	159	}
	160	Int_t runNumber = esd->GetRunNumber();
	161
	162	// load necessary data from OCDB
	163	AliCDBManager::Instance()->SetDefaultStorage(ocdbPath);
	164	AliCDBManager::Instance()->SetRun(runNumber);
	165	if (!AliMUONCDB::LoadField()) return kFALSE;
	166
	167	// set the magnetic field for track extrapolations
	168	AliMUONTrackExtrap::SetField();
211c52eb	169
211c52eb	170	AliMUONTrackParam trackParam;
0ff94351	171
5473f16a	172	// Loop over events
a99c3449	173	Int_t nevents = (Int_t)tree->GetEntries();
5473f16a	174	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
5473f16a	175
5473f16a	176	// get the event summary data
a99c3449	177	if (tree->GetEvent(iEvent) <= 0) {
a99c3449	178	Error("MUONmass_ESD", "no ESD object found for event %d", iEvent);
5473f16a	179	return kFALSE;
5473f16a	180	}
a99c3449	181
f9ebb3bd	182	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	183	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8	184	if (Vertex->GetNContributors()) {
211c52eb	185	fZVertex = Vertex->GetZv();
	186	fYVertex = Vertex->GetYv();
	187	fXVertex = Vertex->GetXv();
690d2205	188	errXVtx = Vertex->GetXRes();
690d2205	189	errYVtx = Vertex->GetYRes();
211c52eb	190	}
f9ebb3bd	191	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	192
48d6b312	193	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	194
5473f16a	195	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	196	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	197
	198	// loop over all reconstructed tracks (also first track of combination)
	199	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	200
b1fea02e	201	// skip ghosts
	202	if (!esd->GetMuonTrack(iTrack)->ContainTrackerData()) continue;
	203
8cde4af5	204	AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a	205
8cde4af5	206	// extrapolate to vertex if required and available
8cde4af5	207	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
103e6575	208	AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
690d2205	209	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
103e6575	210	AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	211	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
103e6575	212	AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack, trackParam);
690d2205	213	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
103e6575	214	AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	215	}
8cde4af5	216
22ccc301	217	fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	218
	219	muonTrack->LorentzP(fV1);
8cde4af5	220
5473f16a	221	ntrackhits = muonTrack->GetNHit();
	222	fitfmin = muonTrack->GetChi2();
	223
	224	// transverse momentum
	225	Float_t pt1 = fV1.Pt();
	226
	227	// total momentum
	228	Float_t p1 = fV1.P();
	229
	230	// Rapidity
	231	Float_t rapMuon1 = fV1.Rapidity();
	232
	233	// chi2 per d.o.f.
	234	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	235	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
22ccc301	236	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
5473f16a	237
	238	// condition for good track (Chi2Cut and PtCut)
	239
a99c3449	240	// if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
5473f16a	241
	242	// fill histos hPtMuon and hChi2PerDof
	243	hPtMuon->Fill(pt1);
	244	hPMuon->Fill(p1);
	245	hChi2PerDof->Fill(ch1);
	246	hRapMuon->Fill(rapMuon1);
22ccc301	247	if (fCharge1 > 0) {
ac3c5325	248	hPtMuonPlus->Fill(pt1);
22ccc301	249	hThetaPhiPlus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	250	} else {
ac3c5325	251	hPtMuonMinus->Fill(pt1);
22ccc301	252	hThetaPhiMinus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	253	}
5473f16a	254	// loop over second track of combination
	255	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	256
b1fea02e	257	// skip ghosts
	258	if (!esd->GetMuonTrack(iTrack2)->ContainTrackerData()) continue;
	259
8cde4af5	260	AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	261
	262	// extrapolate to vertex if required and available
	263	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
103e6575	264	AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
690d2205	265	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
103e6575	266	AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	267	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
103e6575	268	AliMUONESDInterface::GetParamAtFirstCluster(*muonTrack2, trackParam);
690d2205	269	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
103e6575	270	AliMUONESDInterface::SetParamAtVertex(trackParam, *muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	271	}
8cde4af5	272
8cde4af5	273	fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a	274
22ccc301	275	muonTrack2->LorentzP(fV2);
5473f16a	276
8cde4af5	277	ntrackhits = muonTrack2->GetNHit();
8cde4af5	278	fitfmin = muonTrack2->GetChi2();
5473f16a	279
	280	// transverse momentum
	281	Float_t pt2 = fV2.Pt();
	282
	283	// chi2 per d.o.f.
	284	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	285
	286	// condition for good track (Chi2Cut and PtCut)
a99c3449	287	// if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
5473f16a	288
5473f16a	289	// condition for opposite charges
22ccc301	290	if ((fCharge1 * fCharge2) == -1) {
5473f16a	291
	292	// invariant mass
	293	fVtot = fV1 + fV2;
	294	Float_t invMass = fVtot.M();
	295
	296	// fill histos hInvMassAll and hInvMassRes
	297	hInvMassAll->Fill(invMass);
	298	hInvMassRes->Fill(invMass);
ac3c5325	299	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	300	Int_t ptTrig;
6678cd54	301	if (ResType == 553)
8d4fefab	302	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	303	else
8d4fefab	304	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	305
f57d136a	306	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	307	if (invMass > massMin && invMass < massMax) {
5473f16a	308	EventInMass++;
8cde4af5	309	if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	310	EventInMassMatch++;
6678cd54	311
5473f16a	312	hRapResonance->Fill(fVtot.Rapidity());
	313	hPtResonance->Fill(fVtot.Pt());
	314	}
	315
22ccc301	316	} // if (fCharge1 * fCharge2) == -1)
a99c3449	317	// } // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5	318	delete muonTrack2;
5473f16a	319	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
a99c3449	320	// } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5	321	delete muonTrack;
5473f16a	322	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	323
	324	hNumberOfTrack->Fill(nTracks);
48d6b312	325	// esdFile->Delete();
5473f16a	326	} // for (Int_t iEvent = FirstEvent;
5473f16a	327
ac3c5325	328	// Loop over events for bg event
	329
	330	Double_t thetaPlus, phiPlus;
	331	Double_t thetaMinus, phiMinus;
	332	Float_t PtMinus, PtPlus;
	333
	334	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	335
	336	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	337	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	338	PtPlus = hPtMuonPlus->GetRandom();
	339	PtMinus = hPtMuonMinus->GetRandom();
	340
	341	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	342	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	343	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	344
	345	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	346	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	347
	348	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	349	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	350	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	351
	352	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	353	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	354
	355	// invariant mass
	356	fVtot = fV1 + fV2;
	357
	358	// fill histos hInvMassAll and hInvMassRes
	359	hInvMassBg->Fill(fVtot.M());
	360	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	361	}
	362
5473f16a	363	histoFile->Write();
	364	histoFile->Close();
	365
6678cd54	366	cout << endl;
5473f16a	367	cout << "EventInMass " << EventInMass << endl;
6678cd54	368	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	369	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	370
	371	return kTRUE;
	372	}
	373