[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;

  Double_t thetaX, thetaY, pYZ;
  Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
  Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
  Int_t fCharge, fCharge2;

  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.GetParamFrom(*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.GetParamFrom(*muonTrack);
	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
      }

      thetaX = muonTrack->GetThetaX();
      thetaY = muonTrack->GetThetaY();
      
      pYZ     =  1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
      fPzRec1  = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
      fPxRec1  = fPzRec1 * TMath::Tan(thetaX);
      fPyRec1  = fPzRec1 * TMath::Tan(thetaY);
      fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));

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

      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, fCharge);

      // 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 (fCharge > 0) {
	  hPtMuonPlus->Fill(pt1);
	  hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
	} else {
	  hPtMuonMinus->Fill(pt1);
	  hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)*180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)*180./3.1415);
	}
	// 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.GetParamFrom(*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.GetParamFrom(*muonTrack2);
	    AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
	    trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
	  }
	  
	  thetaX = muonTrack2->GetThetaX();
	  thetaY = muonTrack2->GetThetaY();

	  pYZ      =  1./TMath::Abs(muonTrack2->GetInverseBendingMomentum());
	  fPzRec2  = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
	  fPxRec2  = fPzRec2 * TMath::Tan(thetaX);
	  fPyRec2  = fPzRec2 * TMath::Tan(thetaY);
	  fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));

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

	  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 ((fCharge * 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 (fCharge * 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
	121	Double_t thetaX, thetaY, pYZ;
	122	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
	123	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
	124	Int_t fCharge, fCharge2;
	125
	126	Int_t ntrackhits, nevents;
	127	Double_t fitfmin;
e3c6ae4c	128	Double_t fZVertex=0;
211c52eb	129	Double_t fYVertex=0;
211c52eb	130	Double_t fXVertex=0;
5473f16a	131
5473f16a	132	TLorentzVector fV1, fV2, fVtot;
cb75342e	133
8cde4af5	134	// Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
	135	if (!gGeoManager) {
	136	TGeoManager::Import(geoFilename);
	137	if (!gGeoManager) {
	138	Error("MUONmass_ESD", "getting geometry from file %s failed", filename);
	139	return kFALSE;
	140	}
	141	}
	142
0ff94351	143	// set mag field
	144	// waiting for mag field in CDB
	145	printf("Loading field map...\n");
b97b210c	146	AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
0ff94351	147	AliTracker::SetFieldMap(field, kFALSE);
cb75342e	148
5473f16a	149	// open run loader and load gAlice, kinematics and header
	150	AliRunLoader* runLoader = AliRunLoader::Open(filename);
	151	if (!runLoader) {
8cde4af5	152	Error("MUONmass_ESD", "getting run loader from file %s failed", filename);
5473f16a	153	return kFALSE;
	154	}
	155
5473f16a	156	if (!gAlice) {
	157	Error("MUONmass_ESD", "no galice object found");
	158	return kFALSE;
	159	}
	160
	161
	162	// open the ESD file
	163	TFile* esdFile = TFile::Open(esdFileName);
	164	if (!esdFile \|\| !esdFile->IsOpen()) {
	165	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	166	return kFALSE;
	167	}
	168
48d6b312	169	AliESD* esd = new AliESD();
	170	TTree* tree = (TTree*) esdFile->Get("esdTree");
	171	if (!tree) {
	172	Error("CheckESD", "no ESD tree found");
	173	return kFALSE;
	174	}
	175	tree->SetBranchAddress("ESD", &esd);
f9ebb3bd	176
f9ebb3bd	177
48d6b312	178
5473f16a	179	runLoader->LoadHeader();
5473f16a	180	nevents = runLoader->GetNumberOfEvents();
211c52eb	181
211c52eb	182	AliMUONTrackParam trackParam;
0ff94351	183
5473f16a	184	// Loop over events
	185	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	186
	187	// get current event
	188	runLoader->GetEvent(iEvent);
48d6b312	189
5473f16a	190	// get the event summary data
48d6b312	191	tree->GetEvent(iEvent);
5473f16a	192	if (!esd) {
48d6b312	193	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	194	return kFALSE;
	195	}
	196
f9ebb3bd	197	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	198	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8	199	if (Vertex->GetNContributors()) {
211c52eb	200	fZVertex = Vertex->GetZv();
	201	fYVertex = Vertex->GetYv();
	202	fXVertex = Vertex->GetXv();
211c52eb	203	}
f9ebb3bd	204	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	205
48d6b312	206	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	207
5473f16a	208	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	209	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	210
37827b29	211	// set the magnetic field for track extrapolations
37827b29	212	AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
5473f16a	213	// loop over all reconstructed tracks (also first track of combination)
	214	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	215
8cde4af5	216	AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a	217
8cde4af5	218	// extrapolate to vertex if required and available
	219	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
	220	trackParam.GetParamFrom(*muonTrack);
37827b29	221	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
8cde4af5	222	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
	223	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
	224	trackParam.GetParamFrom(*muonTrack);
	225	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
	226	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	227	}
8cde4af5	228
5473f16a	229	thetaX = muonTrack->GetThetaX();
5473f16a	230	thetaY = muonTrack->GetThetaY();
8cde4af5	231
5473f16a	232	pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
d3c448a1	233	fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
5473f16a	234	fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
	235	fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
	236	fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	237
	238	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	239	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	240
	241	ntrackhits = muonTrack->GetNHit();
	242	fitfmin = muonTrack->GetChi2();
	243
	244	// transverse momentum
	245	Float_t pt1 = fV1.Pt();
	246
	247	// total momentum
	248	Float_t p1 = fV1.P();
	249
	250	// Rapidity
	251	Float_t rapMuon1 = fV1.Rapidity();
	252
	253	// chi2 per d.o.f.
	254	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	255	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
	256	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
	257
	258	// condition for good track (Chi2Cut and PtCut)
	259
	260	if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
	261
	262	// fill histos hPtMuon and hChi2PerDof
	263	hPtMuon->Fill(pt1);
	264	hPMuon->Fill(p1);
	265	hChi2PerDof->Fill(ch1);
	266	hRapMuon->Fill(rapMuon1);
ac3c5325	267	if (fCharge > 0) {
	268	hPtMuonPlus->Fill(pt1);
	269	hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)180./3.1415);
	270	} else {
	271	hPtMuonMinus->Fill(pt1);
	272	hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)180./3.1415);
	273	}
5473f16a	274	// loop over second track of combination
	275	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	276
8cde4af5	277	AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	278
	279	// extrapolate to vertex if required and available
	280	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
	281	trackParam.GetParamFrom(*muonTrack2);
37827b29	282	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
8cde4af5	283	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
	284	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
	285	trackParam.GetParamFrom(*muonTrack2);
	286	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
	287	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	288	}
8cde4af5	289
	290	thetaX = muonTrack2->GetThetaX();
	291	thetaY = muonTrack2->GetThetaY();
211c52eb	292
8cde4af5	293	pYZ = 1./TMath::Abs(muonTrack2->GetInverseBendingMomentum());
d3c448a1	294	fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
5473f16a	295	fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
5473f16a	296	fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
8cde4af5	297	fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a	298
	299	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	300	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	301
8cde4af5	302	ntrackhits = muonTrack2->GetNHit();
8cde4af5	303	fitfmin = muonTrack2->GetChi2();
5473f16a	304
	305	// transverse momentum
	306	Float_t pt2 = fV2.Pt();
	307
	308	// chi2 per d.o.f.
	309	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	310
	311	// condition for good track (Chi2Cut and PtCut)
	312	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	313
	314	// condition for opposite charges
	315	if ((fCharge * fCharge2) == -1) {
	316
	317	// invariant mass
	318	fVtot = fV1 + fV2;
	319	Float_t invMass = fVtot.M();
	320
	321	// fill histos hInvMassAll and hInvMassRes
	322	hInvMassAll->Fill(invMass);
	323	hInvMassRes->Fill(invMass);
ac3c5325	324	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	325	Int_t ptTrig;
6678cd54	326	if (ResType == 553)
8d4fefab	327	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	328	else
8d4fefab	329	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	330
f57d136a	331	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	332	if (invMass > massMin && invMass < massMax) {
5473f16a	333	EventInMass++;
8cde4af5	334	if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	335	EventInMassMatch++;
6678cd54	336
5473f16a	337	hRapResonance->Fill(fVtot.Rapidity());
	338	hPtResonance->Fill(fVtot.Pt());
	339	}
	340
	341	} // if (fCharge * fCharge2) == -1)
	342	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5	343	delete muonTrack2;
5473f16a	344	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
5473f16a	345	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5	346	delete muonTrack;
5473f16a	347	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	348
	349	hNumberOfTrack->Fill(nTracks);
48d6b312	350	// esdFile->Delete();
5473f16a	351	} // for (Int_t iEvent = FirstEvent;
5473f16a	352
ac3c5325	353	// Loop over events for bg event
	354
	355	Double_t thetaPlus, phiPlus;
	356	Double_t thetaMinus, phiMinus;
	357	Float_t PtMinus, PtPlus;
	358
	359	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	360
	361	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	362	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	363	PtPlus = hPtMuonPlus->GetRandom();
	364	PtMinus = hPtMuonMinus->GetRandom();
	365
	366	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	367	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	368	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	369
	370	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	371	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	372
	373	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	374	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	375	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	376
	377	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	378	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	379
	380	// invariant mass
	381	fVtot = fV1 + fV2;
	382
	383	// fill histos hInvMassAll and hInvMassRes
	384	hInvMassBg->Fill(fVtot.M());
	385	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	386	}
	387
5473f16a	388	histoFile->Write();
	389	histoFile->Close();
	390
6678cd54	391	cout << endl;
5473f16a	392	cout << "EventInMass " << EventInMass << endl;
6678cd54	393	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	394	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	395
	396	return kTRUE;
	397	}
	398