[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>

// 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:
//   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.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;

  // 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 = esd->GetMuonTrack(iTrack);

      if (!Vertex->GetNContributors()) {
	//re-extrapolate to vertex, if not kown before.
	trackParam.GetParamFrom(*muonTrack);
	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
	trackParam.SetParamFor(*muonTrack);
      }
      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* muonTrack = esd->GetMuonTrack(iTrack2);

	  if (!Vertex->GetNContributors()) {
	    trackParam.GetParamFrom(*muonTrack);
	    AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
	    trackParam.SetParamFor(*muonTrack);
	  }

	  thetaX = muonTrack->GetThetaX();
	  thetaY = muonTrack->GetThetaY();

	  pYZ      =  1./TMath::Abs(muonTrack->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.,muonTrack->GetInverseBendingMomentum()));

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

	  ntrackhits = muonTrack->GetNHit();
	  fitfmin    = muonTrack->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 (muonTrack->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))
	} //  for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
      } // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
    } // 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>
	13
	14	// STEER includes
	15	#include "AliRun.h"
0ff94351	16	#include "AliLog.h"
5473f16a	17	#include "AliRunLoader.h"
	18	#include "AliHeader.h"
	19	#include "AliLoader.h"
	20	#include "AliStack.h"
0ff94351	21	#include "AliMagFMaps.h"
5473f16a	22	#include "AliESD.h"
0ff94351	23	#include "AliTracker.h"
5473f16a	24
5473f16a	25	// MUON includes
211c52eb	26	#include "AliMUONTrackParam.h"
37827b29	27	#include "AliMUONTrackExtrap.h"
5473f16a	28	#include "AliESDMuonTrack.h"
	29	#endif
	30	//
	31	// Macro MUONmassPlot.C for ESD
	32	// Ch. Finck, Subatech, April. 2004
	33	//
	34
	35	// macro to make invariant mass plots
	36	// for combinations of 2 muons with opposite charges,
	37	// from root file "MUON.tracks.root" containing the result of track reconstruction.
	38	// Histograms are stored on the "MUONmassPlot.root" file.
	39	// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
	40	// using Invariant Mass for rapidity.
	41
	42	// Arguments:
	43	// FirstEvent (default 0)
	44	// LastEvent (default 0)
	45	// ResType (default 553)
	46	// 553 for Upsilon, anything else for J/Psi
	47	// Chi2Cut (default 100)
	48	// to keep only tracks with chi2 per d.o.f. < Chi2Cut
	49	// PtCutMin (default 1)
	50	// to keep only tracks with transverse momentum > PtCutMin
	51	// PtCutMax (default 10000)
	52	// to keep only tracks with transverse momentum < PtCutMax
	53	// massMin (default 9.17 for Upsilon)
	54	// & massMax (default 9.77 for Upsilon)
	55	// to calculate the reconstruction efficiency for resonances with invariant mass
	56	// massMin < mass < massMax.
	57
	58	// Add parameters and histograms for analysis
	59
	60	Bool_t MUONmassPlot(char* filename = "galice.root", Int_t FirstEvent = 0, Int_t LastEvent = 10000,
	61	char* esdFileName = "AliESDs.root", Int_t ResType = 553,
	62	Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
	63	Float_t massMin = 9.17,Float_t massMax = 9.77)
	64	{
	65	cout << "MUONmassPlot " << endl;
	66	cout << "FirstEvent " << FirstEvent << endl;
	67	cout << "LastEvent " << LastEvent << endl;
	68	cout << "ResType " << ResType << endl;
	69	cout << "Chi2Cut " << Chi2Cut << endl;
	70	cout << "PtCutMin " << PtCutMin << endl;
	71	cout << "PtCutMax " << PtCutMax << endl;
	72	cout << "massMin " << massMin << endl;
	73	cout << "massMax " << massMax << endl;
	74
	75
	76	//Reset ROOT and connect tree file
	77	gROOT->Reset();
	78
5473f16a	79	// File for histograms and histogram booking
	80	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
	81	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325	82	TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
ac3c5325	83	TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a	84	TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
	85	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
	86	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325	87	TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a	88	TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
	89	TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
	90	TH1F *hInvMassRes;
6ab68e5f	91	TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a	92
	93	if (ResType == 553) {
	94	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
	95	} else {
	96	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
	97	}
	98
	99	TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
	100	TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
	101	TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
	102	TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325	103	TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
ac3c5325	104	TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a	105
	106
	107	// settings
	108	Int_t EventInMass = 0;
6678cd54	109	Int_t EventInMassMatch = 0;
	110	Int_t NbTrigger = 0;
	111
5473f16a	112	Float_t muonMass = 0.105658389;
	113	// Float_t UpsilonMass = 9.46037;
	114	// Float_t JPsiMass = 3.097;
	115
	116	Double_t thetaX, thetaY, pYZ;
	117	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
	118	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
	119	Int_t fCharge, fCharge2;
	120
	121	Int_t ntrackhits, nevents;
	122	Double_t fitfmin;
e3c6ae4c	123	Double_t fZVertex=0;
211c52eb	124	Double_t fYVertex=0;
211c52eb	125	Double_t fXVertex=0;
5473f16a	126
5473f16a	127	TLorentzVector fV1, fV2, fVtot;
cb75342e	128
0ff94351	129	// set mag field
	130	// waiting for mag field in CDB
	131	printf("Loading field map...\n");
b97b210c	132	AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
0ff94351	133	AliTracker::SetFieldMap(field, kFALSE);
cb75342e	134
5473f16a	135	// open run loader and load gAlice, kinematics and header
	136	AliRunLoader* runLoader = AliRunLoader::Open(filename);
	137	if (!runLoader) {
	138	Error("MUONmass_ESD", "getting run loader from file %s failed",
	139	filename);
	140	return kFALSE;
	141	}
	142
5473f16a	143	if (!gAlice) {
	144	Error("MUONmass_ESD", "no galice object found");
	145	return kFALSE;
	146	}
	147
	148
	149	// open the ESD file
	150	TFile* esdFile = TFile::Open(esdFileName);
	151	if (!esdFile \|\| !esdFile->IsOpen()) {
	152	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	153	return kFALSE;
	154	}
	155
48d6b312	156	AliESD* esd = new AliESD();
	157	TTree* tree = (TTree*) esdFile->Get("esdTree");
	158	if (!tree) {
	159	Error("CheckESD", "no ESD tree found");
	160	return kFALSE;
	161	}
	162	tree->SetBranchAddress("ESD", &esd);
f9ebb3bd	163
f9ebb3bd	164
48d6b312	165
5473f16a	166	runLoader->LoadHeader();
5473f16a	167	nevents = runLoader->GetNumberOfEvents();
211c52eb	168
211c52eb	169	AliMUONTrackParam trackParam;
0ff94351	170
5473f16a	171	// Loop over events
	172	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	173
	174	// get current event
	175	runLoader->GetEvent(iEvent);
48d6b312	176
5473f16a	177	// get the event summary data
48d6b312	178	tree->GetEvent(iEvent);
5473f16a	179	if (!esd) {
48d6b312	180	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	181	return kFALSE;
	182	}
	183
f9ebb3bd	184	// get the SPD reconstructed vertex (vertexer) and fill the histogram
43939bd8	185	AliESDVertex* Vertex = (AliESDVertex*) esd->GetVertex();
211c52eb	186
43939bd8	187	if (Vertex->GetNContributors()) {
211c52eb	188	fZVertex = Vertex->GetZv();
	189	fYVertex = Vertex->GetYv();
	190	fXVertex = Vertex->GetXv();
	191
	192	}
f9ebb3bd	193	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	194
48d6b312	195	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	196
5473f16a	197	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	198	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	199
37827b29	200	// set the magnetic field for track extrapolations
37827b29	201	AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
5473f16a	202	// loop over all reconstructed tracks (also first track of combination)
	203	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	204
	205	AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack);
	206
43939bd8	207	if (!Vertex->GetNContributors()) {
211c52eb	208	//re-extrapolate to vertex, if not kown before.
211c52eb	209	trackParam.GetParamFrom(*muonTrack);
37827b29	210	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
211c52eb	211	trackParam.SetParamFor(*muonTrack);
211c52eb	212	}
5473f16a	213	thetaX = muonTrack->GetThetaX();
	214	thetaY = muonTrack->GetThetaY();
	215
	216	pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
d3c448a1	217	fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
5473f16a	218	fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
	219	fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
	220	fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	221
	222	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	223	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	224
	225	ntrackhits = muonTrack->GetNHit();
	226	fitfmin = muonTrack->GetChi2();
	227
	228	// transverse momentum
	229	Float_t pt1 = fV1.Pt();
	230
	231	// total momentum
	232	Float_t p1 = fV1.P();
	233
	234	// Rapidity
	235	Float_t rapMuon1 = fV1.Rapidity();
	236
	237	// chi2 per d.o.f.
	238	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	239	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
	240	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
	241
	242	// condition for good track (Chi2Cut and PtCut)
	243
	244	if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
	245
	246	// fill histos hPtMuon and hChi2PerDof
	247	hPtMuon->Fill(pt1);
	248	hPMuon->Fill(p1);
	249	hChi2PerDof->Fill(ch1);
	250	hRapMuon->Fill(rapMuon1);
ac3c5325	251	if (fCharge > 0) {
	252	hPtMuonPlus->Fill(pt1);
	253	hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)180./3.1415);
	254	} else {
	255	hPtMuonMinus->Fill(pt1);
	256	hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)180./3.1415);
	257	}
5473f16a	258	// loop over second track of combination
	259	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	260
	261	AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack2);
	262
43939bd8	263	if (!Vertex->GetNContributors()) {
211c52eb	264	trackParam.GetParamFrom(*muonTrack);
37827b29	265	AliMUONTrackExtrap::ExtrapToVertex(&trackParam, fXVertex, fYVertex, fZVertex);
211c52eb	266	trackParam.SetParamFor(*muonTrack);
	267	}
	268
5473f16a	269	thetaX = muonTrack->GetThetaX();
	270	thetaY = muonTrack->GetThetaY();
	271
211c52eb	272	pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
d3c448a1	273	fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
5473f16a	274	fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
	275	fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
	276	fCharge2 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	277
	278	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	279	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	280
	281	ntrackhits = muonTrack->GetNHit();
	282	fitfmin = muonTrack->GetChi2();
	283
	284	// transverse momentum
	285	Float_t pt2 = fV2.Pt();
	286
	287	// chi2 per d.o.f.
	288	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	289
	290	// condition for good track (Chi2Cut and PtCut)
	291	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	292
	293	// condition for opposite charges
	294	if ((fCharge * fCharge2) == -1) {
	295
	296	// invariant mass
	297	fVtot = fV1 + fV2;
	298	Float_t invMass = fVtot.M();
	299
	300	// fill histos hInvMassAll and hInvMassRes
	301	hInvMassAll->Fill(invMass);
	302	hInvMassRes->Fill(invMass);
ac3c5325	303	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	304	Int_t ptTrig;
6678cd54	305	if (ResType == 553)
8d4fefab	306	ptTrig = 0x20;// mask for Hpt unlike sign pair
6678cd54	307	else
8d4fefab	308	ptTrig = 0x10;// mask for Lpt unlike sign pair
6678cd54	309
f57d136a	310	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	311	if (invMass > massMin && invMass < massMax) {
5473f16a	312	EventInMass++;
f57d136a	313	if (muonTrack->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	314	EventInMassMatch++;
6678cd54	315
5473f16a	316	hRapResonance->Fill(fVtot.Rapidity());
	317	hPtResonance->Fill(fVtot.Pt());
	318	}
	319
	320	} // if (fCharge * fCharge2) == -1)
	321	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
	322	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
	323	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
	324	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	325
	326	hNumberOfTrack->Fill(nTracks);
48d6b312	327	// esdFile->Delete();
5473f16a	328	} // for (Int_t iEvent = FirstEvent;
5473f16a	329
ac3c5325	330	// Loop over events for bg event
	331
	332	Double_t thetaPlus, phiPlus;
	333	Double_t thetaMinus, phiMinus;
	334	Float_t PtMinus, PtPlus;
	335
	336	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	337
	338	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	339	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	340	PtPlus = hPtMuonPlus->GetRandom();
	341	PtMinus = hPtMuonMinus->GetRandom();
	342
	343	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	344	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	345	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	346
	347	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	348	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	349
	350	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	351	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	352	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	353
	354	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	355	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	356
	357	// invariant mass
	358	fVtot = fV1 + fV2;
	359
	360	// fill histos hInvMassAll and hInvMassRes
	361	hInvMassBg->Fill(fVtot.M());
	362	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	363	}
	364
5473f16a	365	histoFile->Write();
	366	histoFile->Close();
	367
6678cd54	368	cout << endl;
5473f16a	369	cout << "EventInMass " << EventInMass << endl;
6678cd54	370	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	371	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	372
	373	return kTRUE;
	374	}
	375