[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 "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(char* filename = "galice_sim.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;
 
  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;
  }
  
  AliESD* esd = new AliESD();
  TTree* tree = (TTree*) esdFile->Get("esdTree");
  if (!tree) {
    Error("CheckESD", "no ESD tree found");
    return kFALSE;
  }
  tree->SetBranchAddress("ESD", &esd);
  
  
  runLoader->LoadHeader();
  nevents = runLoader->GetNumberOfEvents();
  
  AliMUONTrackParam trackParam;

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

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

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

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

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

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

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

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

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

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

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

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

      // condition for good track (Chi2Cut and PtCut)

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

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

	  muonTrack2->LorentzP(fV2);

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

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

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

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

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

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

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

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

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

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

// Loop over events for bg event

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

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

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

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

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

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

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

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

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

  return kTRUE;
}
Commit	Line	Data
5473f16a	1	#if !defined(__CINT__) \|\| defined(__MAKECINT__)
5473f16a	2	// ROOT includes
48d6b312	3	#include "TTree.h"
5473f16a	4	#include "TBranch.h"
	5	#include "TClonesArray.h"
	6	#include "TLorentzVector.h"
	7	#include "TFile.h"
	8	#include "TH1.h"
ac3c5325	9	#include "TH2.h"
5473f16a	10	#include "TParticle.h"
	11	#include "TTree.h"
	12	#include <Riostream.h>
8cde4af5	13	#include <TGeoManager.h>
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"
5473f16a	24	#include "AliESD.h"
0ff94351	25	#include "AliTracker.h"
5473f16a	26
5473f16a	27	// MUON includes
211c52eb	28	#include "AliMUONTrackParam.h"
37827b29	29	#include "AliMUONTrackExtrap.h"
5473f16a	30	#include "AliESDMuonTrack.h"
	31	#endif
	32	//
	33	// Macro MUONmassPlot.C for ESD
	34	// 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	// Arguments:
8cde4af5	45	// ExtrapToVertex (default -1)
	46	// <0: no extrapolation;
	47	// =0: extrapolation to (0,0,0);
	48	// >0: extrapolation to ESDVertex if available, else to (0,0,0)
5473f16a	49	// FirstEvent (default 0)
	50	// LastEvent (default 0)
	51	// ResType (default 553)
	52	// 553 for Upsilon, anything else for J/Psi
	53	// Chi2Cut (default 100)
	54	// to keep only tracks with chi2 per d.o.f. < Chi2Cut
	55	// PtCutMin (default 1)
	56	// to keep only tracks with transverse momentum > PtCutMin
	57	// PtCutMax (default 10000)
	58	// to keep only tracks with transverse momentum < PtCutMax
	59	// massMin (default 9.17 for Upsilon)
	60	// & massMax (default 9.77 for Upsilon)
	61	// to calculate the reconstruction efficiency for resonances with invariant mass
	62	// massMin < mass < massMax.
	63
	64	// Add parameters and histograms for analysis
	65
6b092dfc	66	Bool_t MUONmassPlot(char* filename = "galice_sim.root", Int_t ExtrapToVertex = -1, char* geoFilename = "geometry.root",
8cde4af5	67	Int_t FirstEvent = 0, Int_t LastEvent = 10000, char* esdFileName = "AliESDs.root", Int_t ResType = 553,
5473f16a	68	Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
	69	Float_t massMin = 9.17,Float_t massMax = 9.77)
	70	{
	71	cout << "MUONmassPlot " << endl;
	72	cout << "FirstEvent " << FirstEvent << endl;
	73	cout << "LastEvent " << LastEvent << endl;
	74	cout << "ResType " << ResType << endl;
	75	cout << "Chi2Cut " << Chi2Cut << endl;
	76	cout << "PtCutMin " << PtCutMin << endl;
	77	cout << "PtCutMax " << PtCutMax << endl;
	78	cout << "massMin " << massMin << endl;
	79	cout << "massMax " << massMax << endl;
	80
	81
	82	//Reset ROOT and connect tree file
	83	gROOT->Reset();
	84
5473f16a	85	// File for histograms and histogram booking
	86	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
	87	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325	88	TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
ac3c5325	89	TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a	90	TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
	91	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
	92	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325	93	TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a	94	TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
	95	TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
	96	TH1F *hInvMassRes;
6ab68e5f	97	TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a	98
	99	if (ResType == 553) {
	100	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
	101	} else {
	102	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
	103	}
	104
	105	TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
	106	TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
	107	TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
	108	TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325	109	TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
ac3c5325	110	TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a	111
	112
	113	// settings
	114	Int_t EventInMass = 0;
6678cd54	115	Int_t EventInMassMatch = 0;
	116	Int_t NbTrigger = 0;
	117
5473f16a	118	Float_t muonMass = 0.105658389;
	119	// Float_t UpsilonMass = 9.46037;
	120	// Float_t JPsiMass = 3.097;
	121
22ccc301	122	Int_t fCharge1, fCharge2;
5473f16a	123	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
5473f16a	124	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
5473f16a	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;
5473f16a	154	}
6b092dfc	155	/*
6b092dfc	156	runLoader->LoadgAlice();
5473f16a	157	if (!gAlice) {
	158	Error("MUONmass_ESD", "no galice object found");
	159	return kFALSE;
	160	}
6b092dfc	161	*/
5473f16a	162
	163	// open the ESD file
	164	TFile* esdFile = TFile::Open(esdFileName);
	165	if (!esdFile \|\| !esdFile->IsOpen()) {
	166	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	167	return kFALSE;
	168	}
	169
48d6b312	170	AliESD* esd = new AliESD();
	171	TTree* tree = (TTree*) esdFile->Get("esdTree");
	172	if (!tree) {
	173	Error("CheckESD", "no ESD tree found");
	174	return kFALSE;
	175	}
	176	tree->SetBranchAddress("ESD", &esd);
f9ebb3bd	177
f9ebb3bd	178
48d6b312	179
5473f16a	180	runLoader->LoadHeader();
5473f16a	181	nevents = runLoader->GetNumberOfEvents();
211c52eb	182
211c52eb	183	AliMUONTrackParam trackParam;
0ff94351	184
5473f16a	185	// Loop over events
	186	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	187
	188	// get current event
	189	runLoader->GetEvent(iEvent);
48d6b312	190
5473f16a	191	// get the event summary data
48d6b312	192	tree->GetEvent(iEvent);
5473f16a	193	if (!esd) {
48d6b312	194	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	195	return kFALSE;
	196	}
	197
f9ebb3bd	198	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	199	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
43939bd8	200	if (Vertex->GetNContributors()) {
211c52eb	201	fZVertex = Vertex->GetZv();
	202	fYVertex = Vertex->GetYv();
	203	fXVertex = Vertex->GetXv();
211c52eb	204	}
f9ebb3bd	205	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	206
48d6b312	207	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	208
5473f16a	209	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	210	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	211
37827b29	212	// set the magnetic field for track extrapolations
37827b29	213	AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
5473f16a	214	// loop over all reconstructed tracks (also first track of combination)
	215	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	216
8cde4af5	217	AliESDMuonTrack* muonTrack = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack)));
5473f16a	218
8cde4af5	219	// extrapolate to vertex if required and available
8cde4af5	220	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	221	trackParam.GetParamFromUncorrected(*muonTrack);
37827b29	222	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
8cde4af5	223	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	224	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	225	trackParam.GetParamFromUncorrected(*muonTrack);
8cde4af5	226	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
8cde4af5	227	trackParam.SetParamFor(*muonTrack); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	228	}
8cde4af5	229
22ccc301	230	fCharge1 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	231
	232	muonTrack->LorentzP(fV1);
8cde4af5	233
5473f16a	234	ntrackhits = muonTrack->GetNHit();
	235	fitfmin = muonTrack->GetChi2();
	236
	237	// transverse momentum
	238	Float_t pt1 = fV1.Pt();
	239
	240	// total momentum
	241	Float_t p1 = fV1.P();
	242
	243	// Rapidity
	244	Float_t rapMuon1 = fV1.Rapidity();
	245
	246	// chi2 per d.o.f.
	247	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	248	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
22ccc301	249	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge1);
5473f16a	250
	251	// condition for good track (Chi2Cut and PtCut)
	252
	253	if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
	254
	255	// fill histos hPtMuon and hChi2PerDof
	256	hPtMuon->Fill(pt1);
	257	hPMuon->Fill(p1);
	258	hChi2PerDof->Fill(ch1);
	259	hRapMuon->Fill(rapMuon1);
22ccc301	260	if (fCharge1 > 0) {
ac3c5325	261	hPtMuonPlus->Fill(pt1);
22ccc301	262	hThetaPhiPlus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	263	} else {
ac3c5325	264	hPtMuonMinus->Fill(pt1);
22ccc301	265	hThetaPhiMinus->Fill(fV1.Phi()180./TMath::Pi(),fV1.Theta()180./TMath::Pi());
ac3c5325	266	}
5473f16a	267	// loop over second track of combination
	268	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	269
8cde4af5	270	AliESDMuonTrack* muonTrack2 = new AliESDMuonTrack(*(esd->GetMuonTrack(iTrack2)));
	271
	272	// extrapolate to vertex if required and available
	273	if (ExtrapToVertex > 0 && Vertex->GetNContributors()) {
22ccc301	274	trackParam.GetParamFromUncorrected(*muonTrack2);
37827b29	275	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
8cde4af5	276	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
8cde4af5	277	} else if ((ExtrapToVertex > 0 && !Vertex->GetNContributors()) \|\| ExtrapToVertex == 0){
22ccc301	278	trackParam.GetParamFromUncorrected(*muonTrack2);
8cde4af5	279	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, 0., 0., 0.);
8cde4af5	280	trackParam.SetParamFor(*muonTrack2); // put the new parameters in this copy of AliESDMuonTrack
211c52eb	281	}
8cde4af5	282
8cde4af5	283	fCharge2 = Int_t(TMath::Sign(1.,muonTrack2->GetInverseBendingMomentum()));
5473f16a	284
22ccc301	285	muonTrack2->LorentzP(fV2);
5473f16a	286
8cde4af5	287	ntrackhits = muonTrack2->GetNHit();
8cde4af5	288	fitfmin = muonTrack2->GetChi2();
5473f16a	289
	290	// transverse momentum
	291	Float_t pt2 = fV2.Pt();
	292
	293	// chi2 per d.o.f.
	294	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	295
	296	// condition for good track (Chi2Cut and PtCut)
	297	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	298
	299	// condition for opposite charges
22ccc301	300	if ((fCharge1 * fCharge2) == -1) {
5473f16a	301
	302	// invariant mass
	303	fVtot = fV1 + fV2;
	304	Float_t invMass = fVtot.M();
	305
	306	// fill histos hInvMassAll and hInvMassRes
	307	hInvMassAll->Fill(invMass);
	308	hInvMassRes->Fill(invMass);
ac3c5325	309	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	310	Int_t ptTrig;
6678cd54	311	if (ResType == 553)
8d4fefab	312	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	313	else
8d4fefab	314	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	315
f57d136a	316	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	317	if (invMass > massMin && invMass < massMax) {
5473f16a	318	EventInMass++;
8cde4af5	319	if (muonTrack2->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	320	EventInMassMatch++;
6678cd54	321
5473f16a	322	hRapResonance->Fill(fVtot.Rapidity());
	323	hPtResonance->Fill(fVtot.Pt());
	324	}
	325
22ccc301	326	} // if (fCharge1 * fCharge2) == -1)
5473f16a	327	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
8cde4af5	328	delete muonTrack2;
5473f16a	329	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
5473f16a	330	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
8cde4af5	331	delete muonTrack;
5473f16a	332	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	333
	334	hNumberOfTrack->Fill(nTracks);
48d6b312	335	// esdFile->Delete();
5473f16a	336	} // for (Int_t iEvent = FirstEvent;
5473f16a	337
ac3c5325	338	// Loop over events for bg event
	339
	340	Double_t thetaPlus, phiPlus;
	341	Double_t thetaMinus, phiMinus;
	342	Float_t PtMinus, PtPlus;
	343
	344	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	345
	346	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	347	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	348	PtPlus = hPtMuonPlus->GetRandom();
	349	PtMinus = hPtMuonMinus->GetRandom();
	350
	351	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	352	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	353	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	354
	355	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	356	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	357
	358	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	359	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	360	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	361
	362	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	363	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	364
	365	// invariant mass
	366	fVtot = fV1 + fV2;
	367
	368	// fill histos hInvMassAll and hInvMassRes
	369	hInvMassBg->Fill(fVtot.M());
	370	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	371	}
	372
5473f16a	373	histoFile->Write();
	374	histoFile->Close();
	375
6678cd54	376	cout << endl;
5473f16a	377	cout << "EventInMass " << EventInMass << endl;
6678cd54	378	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	379	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	380
	381	return kTRUE;
	382	}
	383