[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 "AliRunLoader.h"
#include "AliHeader.h"
#include "AliLoader.h"
#include "AliStack.h"
#include "AliMagF.h"
#include "AliESD.h"

// MUON includes
#include "AliMUONTrackParam.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 off mag field 
  AliMagF::SetReadField(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->AliESD::GetVertex();

    if (Vertex) {
      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;
  
    // 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) {
	//re-extrapolate to vertex, if not kown before.
	trackParam.GetParamFrom(*muonTrack);
	trackParam.ExtrapToVertex(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) {
	    trackParam.GetParamFrom(*muonTrack);
	    trackParam.ExtrapToVertex(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 =  0x400;// mask for Hpt unlike sign pair
	      else 
		ptTrig =  0x200;// 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"
	16	#include "AliRunLoader.h"
	17	#include "AliHeader.h"
	18	#include "AliLoader.h"
	19	#include "AliStack.h"
cb75342e	20	#include "AliMagF.h"
5473f16a	21	#include "AliESD.h"
	22
	23	// MUON includes
211c52eb	24	#include "AliMUONTrackParam.h"
5473f16a	25	#include "AliESDMuonTrack.h"
	26	#endif
	27	//
	28	// Macro MUONmassPlot.C for ESD
	29	// Ch. Finck, Subatech, April. 2004
	30	//
	31
	32	// macro to make invariant mass plots
	33	// for combinations of 2 muons with opposite charges,
	34	// from root file "MUON.tracks.root" containing the result of track reconstruction.
	35	// Histograms are stored on the "MUONmassPlot.root" file.
	36	// introducing TLorentzVector for parameter calculations (Pt, P,rap,etc...)
	37	// using Invariant Mass for rapidity.
	38
	39	// Arguments:
	40	// FirstEvent (default 0)
	41	// LastEvent (default 0)
	42	// ResType (default 553)
	43	// 553 for Upsilon, anything else for J/Psi
	44	// Chi2Cut (default 100)
	45	// to keep only tracks with chi2 per d.o.f. < Chi2Cut
	46	// PtCutMin (default 1)
	47	// to keep only tracks with transverse momentum > PtCutMin
	48	// PtCutMax (default 10000)
	49	// to keep only tracks with transverse momentum < PtCutMax
	50	// massMin (default 9.17 for Upsilon)
	51	// & massMax (default 9.77 for Upsilon)
	52	// to calculate the reconstruction efficiency for resonances with invariant mass
	53	// massMin < mass < massMax.
	54
	55	// Add parameters and histograms for analysis
	56
	57	Bool_t MUONmassPlot(char* filename = "galice.root", Int_t FirstEvent = 0, Int_t LastEvent = 10000,
	58	char* esdFileName = "AliESDs.root", Int_t ResType = 553,
	59	Float_t Chi2Cut = 100., Float_t PtCutMin = 1., Float_t PtCutMax = 10000.,
	60	Float_t massMin = 9.17,Float_t massMax = 9.77)
	61	{
	62	cout << "MUONmassPlot " << endl;
	63	cout << "FirstEvent " << FirstEvent << endl;
	64	cout << "LastEvent " << LastEvent << endl;
	65	cout << "ResType " << ResType << endl;
	66	cout << "Chi2Cut " << Chi2Cut << endl;
	67	cout << "PtCutMin " << PtCutMin << endl;
	68	cout << "PtCutMax " << PtCutMax << endl;
	69	cout << "massMin " << massMin << endl;
	70	cout << "massMax " << massMax << endl;
	71
	72
	73	//Reset ROOT and connect tree file
	74	gROOT->Reset();
	75
5473f16a	76	// File for histograms and histogram booking
	77	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
	78	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
ac3c5325	79	TH1F *hPtMuonPlus = new TH1F("hPtMuonPlus", "Muon+ Pt (GeV/c)", 100, 0., 20.);
ac3c5325	80	TH1F *hPtMuonMinus = new TH1F("hPtMuonMinus", "Muon- Pt (GeV/c)", 100, 0., 20.);
5473f16a	81	TH1F *hPMuon = new TH1F("hPMuon", "Muon P (GeV/c)", 100, 0., 200.);
	82	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
	83	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 480, 0., 12.);
ac3c5325	84	TH1F *hInvMassBg = new TH1F("hInvMassBg", "Mu+Mu- invariant mass BG(GeV/c2)", 480, 0., 12.);
f57d136a	85	TH2F *hInvMassAll_vs_Pt = new TH2F("hInvMassAll_vs_Pt","hInvMassAll_vs_Pt",480,0.,12.,80,0.,20.);
	86	TH2F *hInvMassBgk_vs_Pt = new TH2F("hInvMassBgk_vs_Pt","hInvMassBgk_vs_Pt",480,0.,12.,80,0.,20.);
	87	TH1F *hInvMassRes;
6ab68e5f	88	TH1F *hPrimaryVertex = new TH1F("hPrimaryVertex","SPD reconstructed Z vertex",150,-15,15);
5473f16a	89
	90	if (ResType == 553) {
	91	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
	92	} else {
	93	hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 0., 5.);
	94	}
	95
	96	TH1F *hNumberOfTrack = new TH1F("hNumberOfTrack","nb of track /evt ",20,-0.5,19.5);
	97	TH1F *hRapMuon = new TH1F("hRapMuon"," Muon Rapidity",50,-4.5,-2);
	98	TH1F *hRapResonance = new TH1F("hRapResonance"," Resonance Rapidity",50,-4.5,-2);
	99	TH1F *hPtResonance = new TH1F("hPtResonance", "Resonance Pt (GeV/c)", 100, 0., 20.);
ac3c5325	100	TH2F *hThetaPhiPlus = new TH2F("hThetaPhiPlus", "Theta vs Phi +", 760, -190., 190., 400, 160., 180.);
ac3c5325	101	TH2F *hThetaPhiMinus = new TH2F("hThetaPhiMinus", "Theta vs Phi -", 760, -190., 190., 400, 160., 180.);
5473f16a	102
	103
	104	// settings
	105	Int_t EventInMass = 0;
6678cd54	106	Int_t EventInMassMatch = 0;
	107	Int_t NbTrigger = 0;
	108
5473f16a	109	Float_t muonMass = 0.105658389;
	110	// Float_t UpsilonMass = 9.46037;
	111	// Float_t JPsiMass = 3.097;
	112
	113	Double_t thetaX, thetaY, pYZ;
	114	Double_t fPxRec1, fPyRec1, fPzRec1, fE1;
	115	Double_t fPxRec2, fPyRec2, fPzRec2, fE2;
	116	Int_t fCharge, fCharge2;
	117
	118	Int_t ntrackhits, nevents;
	119	Double_t fitfmin;
e3c6ae4c	120	Double_t fZVertex=0;
211c52eb	121	Double_t fYVertex=0;
211c52eb	122	Double_t fXVertex=0;
5473f16a	123
5473f16a	124	TLorentzVector fV1, fV2, fVtot;
cb75342e	125
	126	// set off mag field
	127	AliMagF::SetReadField(kFALSE);
	128
5473f16a	129	// open run loader and load gAlice, kinematics and header
	130	AliRunLoader* runLoader = AliRunLoader::Open(filename);
	131	if (!runLoader) {
	132	Error("MUONmass_ESD", "getting run loader from file %s failed",
	133	filename);
	134	return kFALSE;
	135	}
	136
5473f16a	137	if (!gAlice) {
	138	Error("MUONmass_ESD", "no galice object found");
	139	return kFALSE;
	140	}
	141
	142
	143	// open the ESD file
	144	TFile* esdFile = TFile::Open(esdFileName);
	145	if (!esdFile \|\| !esdFile->IsOpen()) {
	146	Error("MUONmass_ESD", "opening ESD file %s failed", esdFileName);
	147	return kFALSE;
	148	}
	149
48d6b312	150	AliESD* esd = new AliESD();
	151	TTree* tree = (TTree*) esdFile->Get("esdTree");
	152	if (!tree) {
	153	Error("CheckESD", "no ESD tree found");
	154	return kFALSE;
	155	}
	156	tree->SetBranchAddress("ESD", &esd);
f9ebb3bd	157
f9ebb3bd	158
48d6b312	159
5473f16a	160	runLoader->LoadHeader();
5473f16a	161	nevents = runLoader->GetNumberOfEvents();
211c52eb	162
	163	AliMUONTrackParam trackParam;
	164
5473f16a	165	// Loop over events
	166	for (Int_t iEvent = FirstEvent; iEvent <= TMath::Min(LastEvent, nevents - 1); iEvent++) {
	167
	168	// get current event
	169	runLoader->GetEvent(iEvent);
48d6b312	170
5473f16a	171	// get the event summary data
48d6b312	172	tree->GetEvent(iEvent);
5473f16a	173	if (!esd) {
48d6b312	174	Error("CheckESD", "no ESD object found for event %d", iEvent);
5473f16a	175	return kFALSE;
	176	}
	177
f9ebb3bd	178	// get the SPD reconstructed vertex (vertexer) and fill the histogram
6ab68e5f	179	AliESDVertex* Vertex = (AliESDVertex*) esd->AliESD::GetVertex();
211c52eb	180
	181	if (Vertex) {
	182	fZVertex = Vertex->GetZv();
	183	fYVertex = Vertex->GetYv();
	184	fXVertex = Vertex->GetXv();
	185
	186	}
f9ebb3bd	187	hPrimaryVertex->Fill(fZVertex);
f9ebb3bd	188
48d6b312	189	Int_t nTracks = (Int_t)esd->GetNumberOfMuonTracks() ;
5473f16a	190
5473f16a	191	// printf("\n Nb of events analysed: %d\r",iEvent);
48d6b312	192	// cout << " number of tracks: " << nTracks <<endl;
5473f16a	193
	194	// loop over all reconstructed tracks (also first track of combination)
	195	for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
	196
	197	AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack);
	198
211c52eb	199	if (!Vertex) {
	200	//re-extrapolate to vertex, if not kown before.
	201	trackParam.GetParamFrom(*muonTrack);
	202	trackParam.ExtrapToVertex(fXVertex, fYVertex, fZVertex);
	203	trackParam.SetParamFor(*muonTrack);
	204	}
5473f16a	205	thetaX = muonTrack->GetThetaX();
	206	thetaY = muonTrack->GetThetaY();
	207
	208	pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
d3c448a1	209	fPzRec1 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
5473f16a	210	fPxRec1 = fPzRec1 * TMath::Tan(thetaX);
	211	fPyRec1 = fPzRec1 * TMath::Tan(thetaY);
	212	fCharge = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	213
	214	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	215	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	216
	217	ntrackhits = muonTrack->GetNHit();
	218	fitfmin = muonTrack->GetChi2();
	219
	220	// transverse momentum
	221	Float_t pt1 = fV1.Pt();
	222
	223	// total momentum
	224	Float_t p1 = fV1.P();
	225
	226	// Rapidity
	227	Float_t rapMuon1 = fV1.Rapidity();
	228
	229	// chi2 per d.o.f.
	230	Float_t ch1 = fitfmin / (2.0 * ntrackhits - 5);
	231	// printf(" px %f py %f pz %f NHits %d Norm.chi2 %f charge %d\n",
	232	// fPxRec1, fPyRec1, fPzRec1, ntrackhits, ch1, fCharge);
	233
	234	// condition for good track (Chi2Cut and PtCut)
	235
	236	if ((ch1 < Chi2Cut) && (pt1 > PtCutMin) && (pt1 < PtCutMax)) {
	237
	238	// fill histos hPtMuon and hChi2PerDof
	239	hPtMuon->Fill(pt1);
	240	hPMuon->Fill(p1);
	241	hChi2PerDof->Fill(ch1);
	242	hRapMuon->Fill(rapMuon1);
ac3c5325	243	if (fCharge > 0) {
	244	hPtMuonPlus->Fill(pt1);
	245	hThetaPhiPlus->Fill(TMath::ATan2(fPyRec1,fPxRec1)180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)180./3.1415);
	246	} else {
	247	hPtMuonMinus->Fill(pt1);
	248	hThetaPhiMinus->Fill(TMath::ATan2(fPyRec1,fPxRec1)180./TMath::Pi(),TMath::ATan2(pt1,fPzRec1)180./3.1415);
	249	}
5473f16a	250	// loop over second track of combination
	251	for (Int_t iTrack2 = iTrack + 1; iTrack2 < nTracks; iTrack2++) {
	252
	253	AliESDMuonTrack* muonTrack = esd->GetMuonTrack(iTrack2);
	254
211c52eb	255	if (!Vertex) {
	256	trackParam.GetParamFrom(*muonTrack);
	257	trackParam.ExtrapToVertex(fXVertex, fYVertex, fZVertex);
	258	trackParam.SetParamFor(*muonTrack);
	259	}
	260
5473f16a	261	thetaX = muonTrack->GetThetaX();
	262	thetaY = muonTrack->GetThetaY();
	263
211c52eb	264	pYZ = 1./TMath::Abs(muonTrack->GetInverseBendingMomentum());
d3c448a1	265	fPzRec2 = - pYZ / TMath::Sqrt(1.0 + TMath::Tan(thetaY)*TMath::Tan(thetaY));
5473f16a	266	fPxRec2 = fPzRec2 * TMath::Tan(thetaX);
	267	fPyRec2 = fPzRec2 * TMath::Tan(thetaY);
	268	fCharge2 = Int_t(TMath::Sign(1.,muonTrack->GetInverseBendingMomentum()));
	269
	270	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	271	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	272
	273	ntrackhits = muonTrack->GetNHit();
	274	fitfmin = muonTrack->GetChi2();
	275
	276	// transverse momentum
	277	Float_t pt2 = fV2.Pt();
	278
	279	// chi2 per d.o.f.
	280	Float_t ch2 = fitfmin / (2.0 * ntrackhits - 5);
	281
	282	// condition for good track (Chi2Cut and PtCut)
	283	if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax)) {
	284
	285	// condition for opposite charges
	286	if ((fCharge * fCharge2) == -1) {
	287
	288	// invariant mass
	289	fVtot = fV1 + fV2;
	290	Float_t invMass = fVtot.M();
	291
	292	// fill histos hInvMassAll and hInvMassRes
	293	hInvMassAll->Fill(invMass);
	294	hInvMassRes->Fill(invMass);
ac3c5325	295	hInvMassAll_vs_Pt->Fill(invMass,fVtot.Pt());
6678cd54	296	Int_t ptTrig;
	297	if (ResType == 553)
	298	ptTrig = 0x400;// mask for Hpt unlike sign pair
	299	else
	300	ptTrig = 0x200;// mask for Lpt unlike sign pair
	301
f57d136a	302	if (esd->GetTriggerMask() & ptTrig) NbTrigger++;
5473f16a	303	if (invMass > massMin && invMass < massMax) {
5473f16a	304	EventInMass++;
f57d136a	305	if (muonTrack->GetMatchTrigger() && (esd->GetTriggerMask() & ptTrig))// match with trigger
6678cd54	306	EventInMassMatch++;
6678cd54	307
5473f16a	308	hRapResonance->Fill(fVtot.Rapidity());
	309	hPtResonance->Fill(fVtot.Pt());
	310	}
	311
	312	} // if (fCharge * fCharge2) == -1)
	313	} // if ((ch2 < Chi2Cut) && (pt2 > PtCutMin) && (pt2 < PtCutMax))
	314	} // for (Int_t iTrack2 = iTrack + 1; iTrack2 < iTrack; iTrack2++)
	315	} // if (ch1 < Chi2Cut) && (pt1 > PtCutMin)&& (pt1 < PtCutMax) )
	316	} // for (Int_t iTrack = 0; iTrack < nrectracks; iTrack++)
	317
	318	hNumberOfTrack->Fill(nTracks);
48d6b312	319	// esdFile->Delete();
5473f16a	320	} // for (Int_t iEvent = FirstEvent;
5473f16a	321
ac3c5325	322	// Loop over events for bg event
	323
	324	Double_t thetaPlus, phiPlus;
	325	Double_t thetaMinus, phiMinus;
	326	Float_t PtMinus, PtPlus;
	327
	328	for (Int_t iEvent = 0; iEvent < hInvMassAll->Integral(); iEvent++) {
	329
	330	hThetaPhiPlus->GetRandom2(phiPlus, thetaPlus);
	331	hThetaPhiMinus->GetRandom2(phiMinus,thetaMinus);
	332	PtPlus = hPtMuonPlus->GetRandom();
	333	PtMinus = hPtMuonMinus->GetRandom();
	334
	335	fPxRec1 = PtPlus * TMath::Cos(TMath::Pi()/180.*phiPlus);
	336	fPyRec1 = PtPlus * TMath::Sin(TMath::Pi()/180.*phiPlus);
	337	fPzRec1 = PtPlus / TMath::Tan(TMath::Pi()/180.*thetaPlus);
	338
	339	fE1 = TMath::Sqrt(muonMass * muonMass + fPxRec1 * fPxRec1 + fPyRec1 * fPyRec1 + fPzRec1 * fPzRec1);
	340	fV1.SetPxPyPzE(fPxRec1, fPyRec1, fPzRec1, fE1);
	341
	342	fPxRec2 = PtMinus * TMath::Cos(TMath::Pi()/180.*phiMinus);
	343	fPyRec2 = PtMinus * TMath::Sin(TMath::Pi()/180.*phiMinus);
	344	fPzRec2 = PtMinus / TMath::Tan(TMath::Pi()/180.*thetaMinus);
	345
	346	fE2 = TMath::Sqrt(muonMass * muonMass + fPxRec2 * fPxRec2 + fPyRec2 * fPyRec2 + fPzRec2 * fPzRec2);
	347	fV2.SetPxPyPzE(fPxRec2, fPyRec2, fPzRec2, fE2);
	348
	349	// invariant mass
	350	fVtot = fV1 + fV2;
	351
	352	// fill histos hInvMassAll and hInvMassRes
	353	hInvMassBg->Fill(fVtot.M());
	354	hInvMassBgk_vs_Pt->Fill( fVtot.M(), fVtot.Pt() );
	355	}
	356
5473f16a	357	histoFile->Write();
	358	histoFile->Close();
	359
6678cd54	360	cout << endl;
5473f16a	361	cout << "EventInMass " << EventInMass << endl;
6678cd54	362	cout << "NbTrigger " << NbTrigger << endl;
6678cd54	363	cout << "EventInMass match with trigger " << EventInMassMatch << endl;
5473f16a	364
	365	return kTRUE;
	366	}
	367