[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
//
// 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(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)
{
  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"
	32	#endif
	33	//
	34	// Macro MUONmassPlot.C for ESD
	35	// 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	// Arguments:
8cde4af5	46	// ExtrapToVertex (default -1)
	47	// <0: no extrapolation;
	48	// =0: extrapolation to (0,0,0);
	49	// >0: extrapolation to ESDVertex if available, else to (0,0,0)
5473f16a	50	// FirstEvent (default 0)
	51	// LastEvent (default 0)
	52	// ResType (default 553)
	53	// 553 for Upsilon, anything else for J/Psi
	54	// Chi2Cut (default 100)
	55	// to keep only tracks with chi2 per d.o.f. < Chi2Cut
	56	// PtCutMin (default 1)
	57	// to keep only tracks with transverse momentum > PtCutMin
	58	// PtCutMax (default 10000)
	59	// to keep only tracks with transverse momentum < PtCutMax
	60	// massMin (default 9.17 for Upsilon)
	61	// & massMax (default 9.77 for Upsilon)
	62	// to calculate the reconstruction efficiency for resonances with invariant mass
	63	// massMin < mass < massMax.
	64
	65	// Add parameters and histograms for analysis
	66
690d2205	67	Bool_t MUONmassPlot(char* filename = "generated/galice.root", Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root",
8cde4af5	68	Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553,
5473f16a	69	Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
	70	Float_t massMin = 9.17,Float_t massMax = 9.77)
	71	{
	72	cout << "MUONmassPlot " << endl;
	73	cout << "FirstEvent " << FirstEvent << endl;
	74	cout << "LastEvent " << LastEvent << endl;
	75	cout << "ResType " << ResType << endl;
	76	cout << "Chi2Cut " << Chi2Cut << endl;
	77	cout << "PtCutMin " << PtCutMin << endl;
	78	cout << "PtCutMax " << PtCutMax << endl;
	79	cout << "massMin " << massMin << endl;
	80	cout << "massMax " << massMax << endl;
	81
	82
	83	//Reset ROOT and connect tree file
	84	gROOT->Reset();
	85
5473f16a	86	// File for histograms and histogram booking
	87	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
	88	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325	89	TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
ac3c5325	90	TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a	91	TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
	92	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
	93	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325	94	TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a	95	TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
	96	TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
	97	TH1F *hInvMassRes;
6ab68e5f	98	TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a	99
	100	if (ResType == 553) {
	101	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
	102	} else {
	103	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
	104	}
	105
	106	TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
	107	TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
	108	TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
	109	TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325	110	TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
ac3c5325	111	TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a	112
	113
	114	// settings
	115	Int_t EventInMass = 0;
6678cd54	116	Int_t EventInMassMatch = 0;
	117	Int_t NbTrigger = 0;
	118
5473f16a	119	Float_t muonMass = 0.105658389;
	120	// Float_t UpsilonMass = 9.46037;
	121	// Float_t JPsiMass = 3.097;
	122
22ccc301	123	Int_t fCharge1, fCharge2;
5473f16a	124	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
5473f16a	125	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
5473f16a	126
	127	Int_t ntrackhits, nevents;
	128	Double_t fitfmin;
e3c6ae4c	129	Double_t fZVertex=0;
211c52eb	130	Double_t fYVertex=0;
211c52eb	131	Double_t fXVertex=0;
690d2205	132	Double_t errXVtx=0;
690d2205	133	Double_t errYVtx=0;
5473f16a	134
5473f16a	135	TLorentzVector fV1, fV2, fVtot;
cb75342e	136
8cde4af5	137	// Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
	138	if (!gGeoManager) {
	139	TGeoManager::Import(geoFilename);
	140	if (!gGeoManager) {
	141	Error("MUONmass_ESD", "getting geometry from file %s failed", filename);
	142	return kFALSE;
	143	}
	144	}
	145
0ff94351	146	// set mag field
	147	// waiting for mag field in CDB
	148	printf("Loading field map...\n");
b97b210c	149	AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
0ff94351	150	AliTracker::SetFieldMap(field, kFALSE);
cb75342e	151
5473f16a	152	// open run loader and load gAlice, kinematics and header
	153	AliRunLoader* runLoader = AliRunLoader::Open(filename);
	154	if (!runLoader) {
8cde4af5	155	Error("MUONmass_ESD", "getting run loader from file %s failed", filename);
5473f16a	156	return kFALSE;
5473f16a	157	}
6b092dfc	158	/*
6b092dfc	159	runLoader->LoadgAlice();
5473f16a	160	if (!gAlice) {
	161	Error("MUONmass_ESD", "no galice object found");
	162	return kFALSE;
	163	}
6b092dfc	164	*/
5473f16a	165
	166	// open the ESD file
	167	TFile* esdFile = TFile::Open(esdFileName);
	168	if (!esdFile \|\| !esdFile->IsOpen()) {
	169	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	170	return kFALSE;
	171	}
	172
1c2bdf00	173	AliESDEvent* esd = new AliESDEvent();
48d6b312	174	TTree* tree = (TTree*) esdFile->Get("esdTree");
	175	if (!tree) {
	176	Error("CheckESD", "no ESD tree found");
	177	return kFALSE;
	178	}
8b4a9b89	179	// tree->SetBranchAddress("ESD", &esd);
8b4a9b89	180	esd->ReadFromTree(tree);
f9ebb3bd	181
48d6b312	182
5473f16a	183	runLoader->LoadHeader();
5473f16a	184	nevents = runLoader->GetNumberOfEvents();
211c52eb	185
211c52eb	186	AliMUONTrackParam trackParam;
0ff94351	187
5473f16a	188	// Loop over events
	189	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	190
	191	// get current event
	192	runLoader->GetEvent(iEvent);
48d6b312	193
5473f16a	194	// get the event summary data
48d6b312	195	tree->GetEvent(iEvent);
5473f16a	196	if (!esd) {
48d6b312	197	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	198	return kFALSE;
	199	}
	200
f9ebb3bd	201	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	202	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8	203	if (Vertex->GetNContributors()) {
211c52eb	204	fZVertex = Vertex->GetZv();
	205	fYVertex = Vertex->GetYv();
	206	fXVertex = Vertex->GetXv();
690d2205	207	errXVtx = Vertex->GetXRes();
690d2205	208	errYVtx = Vertex->GetYRes();
211c52eb	209	}
f9ebb3bd	210	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	211
48d6b312	212	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	213
5473f16a	214	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	215	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	216
37827b29	217	// set the magnetic field for track extrapolations
37827b29	218	AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
5473f16a	219	// loop over all reconstructed tracks (also first track of combination)
	220	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	221
8cde4af5	222	AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a	223
8cde4af5	224	// extrapolate to vertex if required and available
8cde4af5	225	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	226	trackParam.GetParamFromUncorrected(*muonTrack);
690d2205	227	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
8cde4af5	228	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	229	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	230	trackParam.GetParamFromUncorrected(*muonTrack);
690d2205	231	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
8cde4af5	232	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	233	}
8cde4af5	234
22ccc301	235	fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	236
	237	muonTrack->LorentzP(fV1);
8cde4af5	238
5473f16a	239	ntrackhits = muonTrack->GetNHit();
	240	fitfmin = muonTrack->GetChi2();
	241
	242	// transverse momentum
	243	Float_t pt1 = fV1.Pt();
	244
	245	// total momentum
	246	Float_t p1 = fV1.P();
	247
	248	// Rapidity
	249	Float_t rapMuon1 = fV1.Rapidity();
	250
	251	// chi2 per d.o.f.
	252	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	253	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
22ccc301	254	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
5473f16a	255
	256	// condition for good track (Chi2Cut and PtCut)
	257
	258	if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
	259
	260	// fill histos hPtMuon and hChi2PerDof
	261	hPtMuon->Fill(pt1);
	262	hPMuon->Fill(p1);
	263	hChi2PerDof->Fill(ch1);
	264	hRapMuon->Fill(rapMuon1);
22ccc301	265	if (fCharge1 > 0) {
ac3c5325	266	hPtMuonPlus->Fill(pt1);
22ccc301	267	hThetaPhiPlus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	268	} else {
ac3c5325	269	hPtMuonMinus->Fill(pt1);
22ccc301	270	hThetaPhiMinus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	271	}
5473f16a	272	// loop over second track of combination
	273	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	274
8cde4af5	275	AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	276
	277	// extrapolate to vertex if required and available
	278	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	279	trackParam.GetParamFromUncorrected(*muonTrack2);
690d2205	280	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex, errXVtx, errYVtx);
8cde4af5	281	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	282	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	283	trackParam.GetParamFromUncorrected(*muonTrack2);
690d2205	284	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0., 0., 0.);
8cde4af5	285	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	286	}
8cde4af5	287
8cde4af5	288	fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a	289
22ccc301	290	muonTrack2->LorentzP(fV2);
5473f16a	291
8cde4af5	292	ntrackhits = muonTrack2->GetNHit();
8cde4af5	293	fitfmin = muonTrack2->GetChi2();
5473f16a	294
	295	// transverse momentum
	296	Float_t pt2 = fV2.Pt();
	297
	298	// chi2 per d.o.f.
	299	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	300
	301	// condition for good track (Chi2Cut and PtCut)
	302	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	303
	304	// condition for opposite charges
22ccc301	305	if ((fCharge1 * fCharge2) == -1) {
5473f16a	306
	307	// invariant mass
	308	fVtot = fV1 + fV2;
	309	Float_t invMass = fVtot.M();
	310
	311	// fill histos hInvMassAll and hInvMassRes
	312	hInvMassAll->Fill(invMass);
	313	hInvMassRes->Fill(invMass);
ac3c5325	314	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	315	Int_t ptTrig;
6678cd54	316	if (ResType == 553)
8d4fefab	317	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	318	else
8d4fefab	319	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	320
f57d136a	321	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	322	if (invMass > massMin && invMass < massMax) {
5473f16a	323	EventInMass++;
8cde4af5	324	if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	325	EventInMassMatch++;
6678cd54	326
5473f16a	327	hRapResonance->Fill(fVtot.Rapidity());
	328	hPtResonance->Fill(fVtot.Pt());
	329	}
	330
22ccc301	331	} // if (fCharge1 * fCharge2) == -1)
5473f16a	332	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5	333	delete muonTrack2;
5473f16a	334	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
5473f16a	335	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5	336	delete muonTrack;
5473f16a	337	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	338
	339	hNumberOfTrack->Fill(nTracks);
48d6b312	340	// esdFile->Delete();
5473f16a	341	} // for (Int_t iEvent = FirstEvent;
5473f16a	342
ac3c5325	343	// Loop over events for bg event
	344
	345	Double_t thetaPlus, phiPlus;
	346	Double_t thetaMinus, phiMinus;
	347	Float_t PtMinus, PtPlus;
	348
	349	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	350
	351	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	352	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	353	PtPlus = hPtMuonPlus->GetRandom();
	354	PtMinus = hPtMuonMinus->GetRandom();
	355
	356	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	357	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	358	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	359
	360	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	361	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	362
	363	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	364	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	365	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	366
	367	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	368	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	369
	370	// invariant mass
	371	fVtot = fV1 + fV2;
	372
	373	// fill histos hInvMassAll and hInvMassRes
	374	hInvMassBg->Fill(fVtot.M());
	375	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	376	}
	377
5473f16a	378	histoFile->Write();
	379	histoFile->Close();
	380
6678cd54	381	cout << endl;
5473f16a	382	cout << "EventInMass " << EventInMass << endl;
6678cd54	383	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	384	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	385
	386	return kTRUE;
	387	}
	388