[u/mrichter/AliRoot.git] / MUON / MUONmassPlot.C

// macro to make invariant mass plots
// for combinations of 2 muons with opposite charges,
// from root file "MUONtrackReco.root" containing the result of track reconstruction,
// generated by the macro "MUONrecoNtuple.C".
// Histograms are stored on the "MUONmassPlot.root" file.
// A model for macros using the Ntuple in the file "MUONtrackReco.root"
// may be found in "MUONtrackRecoModel.C":
// it has been obtained by reading with Root a file "MUONtrackReco.root",
// and executing the command:
// MUONtrackReco->MakeCode("MUONtrackRecoModel.C")

// Arguments:
//   FirstEvent (default 0)
//   LastEvent (default 0)
//   ResType (default 553)
//      553 for Upsilon, anything else for J/Psi
//   NSigma (default 3)
//      the number of combinations is counted around the resonance mass
//      within +/- NSigma times the nominal sigma's
//      (0.099 GeV for Upsilon, 0.0615 GeV for J/Psi)
//   Chi2Cut (default 100)
//      to keep only tracks with chi2 per d.o.f. < Chi2Cut
//   PtCut (default 1)
//      to keep only tracks with transverse momentum > PtCut

void MUONmassPlot(Int_t FirstEvent = 0, Int_t LastEvent = 0, Int_t ResType = 553, Float_t Nsig = 3., Float_t Chi2Cut = 100., Float_t PtCut = 1.)
{
  cout << "MUONmassPlot" << endl;
  cout << "FirstEvent" << FirstEvent << endl;
  cout << "LastEvent" << LastEvent << endl;
  cout << "ResType" << ResType << endl;
  cout << "Nsig" << Nsig << endl;
  cout << "Chi2Cut" << Chi2Cut << endl;
  cout << "PtCut" << PtCut << endl;

  //////////////////////////////////////////////////////////
  //   This file has been automatically generated 
  //     (Thu Sep 21 14:53:11 2000 by ROOT version2.25/02)
  //   from TTree MUONtrackReco/MUONtrackReco
  //   found on file: MUONtrackReco.root
  //////////////////////////////////////////////////////////


  //Reset ROOT and connect tree file
  gROOT->Reset();
  TFile *f = (TFile*)gROOT->GetListOfFiles()->FindObject("MUONtrackReco.root");
  if (!f) {
    f = new TFile("MUONtrackReco.root");
  }
  TTree *MUONtrackReco = (TTree*)gDirectory->Get("MUONtrackReco");

//Declaration of leaves types
  Int_t           fEvent;
  UInt_t          fUniqueID;
  UInt_t          fBits;
  Int_t           Tracks_;
  Int_t           Tracks_fCharge[5];
  Float_t         Tracks_fPxRec[5];
  Float_t         Tracks_fPyRec[5];
  Float_t         Tracks_fPzRec[5];
  Float_t         Tracks_fZRec[5];
  Float_t         Tracks_fZRec1[5];
  Int_t           Tracks_fNHits[5];
  Float_t         Tracks_fChi2[5];
  Float_t         Tracks_fPxGen[5];
  Float_t         Tracks_fPyGen[5];
  Float_t         Tracks_fPzGen[5];
  UInt_t          Tracks_fUniqueID[5];
  UInt_t          Tracks_fBits[5];

  //Set branch addresses
  //MUONtrackReco->SetBranchAddress("Header",&Header);
  MUONtrackReco->SetBranchAddress("fEvent",&fEvent);
  MUONtrackReco->SetBranchAddress("fUniqueID",&fUniqueID);
  MUONtrackReco->SetBranchAddress("fBits",&fBits);
  MUONtrackReco->SetBranchAddress("Tracks_",&Tracks_);
  MUONtrackReco->SetBranchAddress("Tracks.fCharge",Tracks_fCharge);
  MUONtrackReco->SetBranchAddress("Tracks.fPxRec",Tracks_fPxRec);
  MUONtrackReco->SetBranchAddress("Tracks.fPyRec",Tracks_fPyRec);
  MUONtrackReco->SetBranchAddress("Tracks.fPzRec",Tracks_fPzRec);
  MUONtrackReco->SetBranchAddress("Tracks.fZRec",Tracks_fZRec);
  MUONtrackReco->SetBranchAddress("Tracks.fZRec1",Tracks_fZRec1);
  MUONtrackReco->SetBranchAddress("Tracks.fNHits",Tracks_fNHits);
  MUONtrackReco->SetBranchAddress("Tracks.fChi2",Tracks_fChi2);
  MUONtrackReco->SetBranchAddress("Tracks.fPxGen",Tracks_fPxGen);
  MUONtrackReco->SetBranchAddress("Tracks.fPyGen",Tracks_fPyGen);
  MUONtrackReco->SetBranchAddress("Tracks.fPzGen",Tracks_fPzGen);
  MUONtrackReco->SetBranchAddress("Tracks.fUniqueID",Tracks_fUniqueID);
  MUONtrackReco->SetBranchAddress("Tracks.fBits",Tracks_fBits);

//     This is the loop skeleton
//       To read only selected branches, Insert statements like:
// MUONtrackReco->SetBranchStatus("*",0);  // disable all branches
// TTreePlayer->SetBranchStatus("branchname",1);  // activate branchname

  Int_t nentries = MUONtrackReco->GetEntries();

  Int_t nbytes = 0;
  //   for (Int_t i=0; i<nentries;i++) {
  //      nbytes += MUONtrackReco->GetEntry(i);
  //   }

  /////////////////////////////////////////////////////////////////
  // Here comes the specialized part for MUONmassPlot
  /////////////////////////////////////////////////////////////////

  // 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 *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
  TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 240, 0., 12.);
  if (ResType = 553) TH1F *hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
  else TH1F *hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 1., 5.);

  // Loop over events
  for (Int_t event = FirstEvent; event <= TMath::Min(LastEvent, nentries - 1); event++) {
    // get current event
    nbytes += MUONtrackReco->GetEntry(event);
    // loop over all reconstructed tracks (also first track of combination)
    for (Int_t t1 = 0; t1 < Tracks_; t1++) {
      // transverse momentum
      Float_t pt1 = TMath::Sqrt(Tracks_fPxRec[t1] * Tracks_fPxRec[t1] + Tracks_fPyRec[t1] * Tracks_fPyRec[t1]);
      // chi2 per d.o.f.
      Float_t ch1 = Tracks_fChi2[t1] / (2.0 * Tracks_fNHits[t1] - 5);
      // condition for good track (Chi2Cut and PtCut)
      if ((ch1 < Chi2Cut) && (pt1 > PtCut)) {
	// fill histos hPtMuon and hChi2PerDof
	hPtMuon->Fill(pt1);
	hChi2PerDof->Fill(ch1);
	// loop over second track of combination
	for (Int_t t2 = t1 + 1; t2 < Tracks_; t2++) {
	  // transverse momentum
	  Float_t pt2 = TMath::Sqrt(Tracks_fPxRec[t2] * Tracks_fPxRec[t2] + Tracks_fPyRec[t2] * Tracks_fPyRec[t2]);
	  // chi2 per d.o.f.
	  Float_t ch2 = Tracks_fChi2[t2] / (2.0 * Tracks_fNHits[t2] - 5);
	  // condition for good track (Chi2Cut and PtCut)
	  if ((ch2 < Chi2Cut) && (pt2 > PtCut)) {
	    // condition for opposite charges
	    if ((Tracks_fCharge[t1] * Tracks_fCharge[t2]) == -1) {
	      // invariant mass
	      Float_t invMass = MuPlusMuMinusMass(Tracks_fPxRec[t1], Tracks_fPyRec[t1], Tracks_fPzRec[t1], Tracks_fPxRec[t2], Tracks_fPyRec[t2], Tracks_fPzRec[t2]);
	      // fill histos hInvMassAll and hInvMassRes
	      hInvMassAll->Fill(invMass);
	      hInvMassRes->Fill(invMass);
	    } //if ((Tracks_fCharge[t1] * Tracks_fCharge[t2]) == -1)
	  } // if ((Tracks_fChi2[t2] < Chi2Cut) && (pt2 > PtCut))
	} // for (Int_t t2 = t1 + 1; t2 < Tracks_; t2++)
      } // if ((Tracks_fChi2[t1] < Chi2Cut) && (pt1 > PtCut))
    } // for (Int_t t1 = 0; t1 < Tracks_; t1++)
  } // for (Int_t event = FirstEvent;

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

Float_t MuPlusMuMinusMass(Float_t Px1, Float_t Py1, Float_t Pz1, Float_t Px2, Float_t Py2, Float_t Pz2)
{
  Float_t muonMass = 0.10566;
  Float_t e1 = TMath::Sqrt(muonMass * muonMass + Px1 * Px1 + Py1 * Py1 + Pz1 * Pz1);
  Float_t e2 = TMath::Sqrt(muonMass * muonMass + Px2 * Px2 + Py2 * Py2 + Pz2 * Pz2);
  return (TMath::Sqrt(2.0 * (muonMass * muonMass + e1 * e2 - Px1 * Px2 - Py1 * Py2 - Pz1 * Pz2)));
}
Commit	Line	Data
c2a319d4	1	// macro to make invariant mass plots
	2	// for combinations of 2 muons with opposite charges,
	3	// from root file "MUONtrackReco.root" containing the result of track reconstruction,
	4	// generated by the macro "MUONrecoNtuple.C".
	5	// Histograms are stored on the "MUONmassPlot.root" file.
	6	// A model for macros using the Ntuple in the file "MUONtrackReco.root"
	7	// may be found in "MUONtrackRecoModel.C":
	8	// it has been obtained by reading with Root a file "MUONtrackReco.root",
	9	// and executing the command:
	10	// MUONtrackReco->MakeCode("MUONtrackRecoModel.C")
	11
	12	// Arguments:
	13	// FirstEvent (default 0)
	14	// LastEvent (default 0)
	15	// ResType (default 553)
	16	// 553 for Upsilon, anything else for J/Psi
	17	// NSigma (default 3)
	18	// the number of combinations is counted around the resonance mass
	19	// within +/- NSigma times the nominal sigma's
	20	// (0.099 GeV for Upsilon, 0.0615 GeV for J/Psi)
	21	// Chi2Cut (default 100)
	22	// to keep only tracks with chi2 per d.o.f. < Chi2Cut
	23	// PtCut (default 1)
	24	// to keep only tracks with transverse momentum > PtCut
	25
	26	void MUONmassPlot(Int_t FirstEvent = 0, Int_t LastEvent = 0, Int_t ResType = 553, Float_t Nsig = 3., Float_t Chi2Cut = 100., Float_t PtCut = 1.)
	27	{
	28	cout << "MUONmassPlot" << endl;
	29	cout << "FirstEvent" << FirstEvent << endl;
	30	cout << "LastEvent" << LastEvent << endl;
	31	cout << "ResType" << ResType << endl;
	32	cout << "Nsig" << Nsig << endl;
	33	cout << "Chi2Cut" << Chi2Cut << endl;
	34	cout << "PtCut" << PtCut << endl;
	35
	36	//////////////////////////////////////////////////////////
	37	// This file has been automatically generated
	38	// (Thu Sep 21 14:53:11 2000 by ROOT version2.25/02)
	39	// from TTree MUONtrackReco/MUONtrackReco
	40	// found on file: MUONtrackReco.root
	41	//////////////////////////////////////////////////////////
	42
	43
	44	//Reset ROOT and connect tree file
	45	gROOT->Reset();
	46	TFile f = (TFile)gROOT->GetListOfFiles()->FindObject("MUONtrackReco.root");
	47	if (!f) {
	48	f = new TFile("MUONtrackReco.root");
	49	}
	50	TTree MUONtrackReco = (TTree)gDirectory->Get("MUONtrackReco");
	51
	52	//Declaration of leaves types
	53	Int_t fEvent;
	54	UInt_t fUniqueID;
	55	UInt_t fBits;
	56	Int_t Tracks_;
	57	Int_t Tracks_fCharge[5];
	58	Float_t Tracks_fPxRec[5];
	59	Float_t Tracks_fPyRec[5];
	60	Float_t Tracks_fPzRec[5];
	61	Float_t Tracks_fZRec[5];
	62	Float_t Tracks_fZRec1[5];
	63	Int_t Tracks_fNHits[5];
	64	Float_t Tracks_fChi2[5];
65	Float_t Tracks_fPxGen[5];
66	Float_t Tracks_fPyGen[5];
67	Float_t Tracks_fPzGen[5];
68	UInt_t Tracks_fUniqueID[5];
69	UInt_t Tracks_fBits[5];
70
71	//Set branch addresses
72	//MUONtrackReco->SetBranchAddress("Header",&Header);
73	MUONtrackReco->SetBranchAddress("fEvent",&fEvent);
74	MUONtrackReco->SetBranchAddress("fUniqueID",&fUniqueID);
75	MUONtrackReco->SetBranchAddress("fBits",&fBits);
76	MUONtrackReco->SetBranchAddress("Tracks_",&Tracks_);
77	MUONtrackReco->SetBranchAddress("Tracks.fCharge",Tracks_fCharge);
78	MUONtrackReco->SetBranchAddress("Tracks.fPxRec",Tracks_fPxRec);
79	MUONtrackReco->SetBranchAddress("Tracks.fPyRec",Tracks_fPyRec);
80	MUONtrackReco->SetBranchAddress("Tracks.fPzRec",Tracks_fPzRec);
81	MUONtrackReco->SetBranchAddress("Tracks.fZRec",Tracks_fZRec);
82	MUONtrackReco->SetBranchAddress("Tracks.fZRec1",Tracks_fZRec1);
83	MUONtrackReco->SetBranchAddress("Tracks.fNHits",Tracks_fNHits);
84	MUONtrackReco->SetBranchAddress("Tracks.fChi2",Tracks_fChi2);
85	MUONtrackReco->SetBranchAddress("Tracks.fPxGen",Tracks_fPxGen);
86	MUONtrackReco->SetBranchAddress("Tracks.fPyGen",Tracks_fPyGen);
87	MUONtrackReco->SetBranchAddress("Tracks.fPzGen",Tracks_fPzGen);
88	MUONtrackReco->SetBranchAddress("Tracks.fUniqueID",Tracks_fUniqueID);
89	MUONtrackReco->SetBranchAddress("Tracks.fBits",Tracks_fBits);
90
91	// This is the loop skeleton
92	// To read only selected branches, Insert statements like:
93	// MUONtrackReco->SetBranchStatus("*",0); // disable all branches
94	// TTreePlayer->SetBranchStatus("branchname",1); // activate branchname
95
96	Int_t nentries = MUONtrackReco->GetEntries();
97
98	Int_t nbytes = 0;
99	// for (Int_t i=0; i<nentries;i++) {
100	// nbytes += MUONtrackReco->GetEntry(i);
101	// }
102
103	/////////////////////////////////////////////////////////////////
104	// Here comes the specialized part for MUONmassPlot
105	/////////////////////////////////////////////////////////////////
106
107	// File for histograms and histogram booking
108	TFile *histoFile = new TFile("MUONmassPlot.root", "RECREATE");
109	TH1F *hPtMuon = new TH1F("hPtMuon", "Muon Pt (GeV/c)", 100, 0., 20.);
110	TH1F *hChi2PerDof = new TH1F("hChi2PerDof", "Muon track chi2/d.o.f.", 100, 0., 20.);
111	TH1F *hInvMassAll = new TH1F("hInvMassAll", "Mu+Mu- invariant mass (GeV/c2)", 240, 0., 12.);
112	if (ResType = 553) TH1F *hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around Upsilon", 60, 8., 11.);
113	else TH1F *hInvMassRes = new TH1F("hInvMassRes", "Mu+Mu- invariant mass (GeV/c2) around J/Psi", 80, 1., 5.);
114
115	// Loop over events
116	for (Int_t event = FirstEvent; event <= TMath::Min(LastEvent, nentries - 1); event++) {
117	// get current event
118	nbytes += MUONtrackReco->GetEntry(event);
119	// loop over all reconstructed tracks (also first track of combination)
120	for (Int_t t1 = 0; t1 < Tracks_; t1++) {
121	// transverse momentum
122	Float_t pt1 = TMath::Sqrt(Tracks_fPxRec[t1] * Tracks_fPxRec[t1] + Tracks_fPyRec[t1] * Tracks_fPyRec[t1]);
123	// chi2 per d.o.f.
124	Float_t ch1 = Tracks_fChi2[t1] / (2.0 * Tracks_fNHits[t1] - 5);
125	// condition for good track (Chi2Cut and PtCut)
126	if ((ch1 < Chi2Cut) && (pt1 > PtCut)) {
127	// fill histos hPtMuon and hChi2PerDof
128	hPtMuon->Fill(pt1);
129	hChi2PerDof->Fill(ch1);
130	// loop over second track of combination
131	for (Int_t t2 = t1 + 1; t2 < Tracks_; t2++) {
132	// transverse momentum
133	Float_t pt2 = TMath::Sqrt(Tracks_fPxRec[t2] * Tracks_fPxRec[t2] + Tracks_fPyRec[t2] * Tracks_fPyRec[t2]);
134	// chi2 per d.o.f.
135	Float_t ch2 = Tracks_fChi2[t2] / (2.0 * Tracks_fNHits[t2] - 5);
136	// condition for good track (Chi2Cut and PtCut)
137	if ((ch2 < Chi2Cut) && (pt2 > PtCut)) {
138	// condition for opposite charges
139	if ((Tracks_fCharge[t1] * Tracks_fCharge[t2]) == -1) {
140	// invariant mass
141	Float_t invMass = MuPlusMuMinusMass(Tracks_fPxRec[t1], Tracks_fPyRec[t1], Tracks_fPzRec[t1], Tracks_fPxRec[t2], Tracks_fPyRec[t2], Tracks_fPzRec[t2]);
142	// fill histos hInvMassAll and hInvMassRes
143	hInvMassAll->Fill(invMass);
144	hInvMassRes->Fill(invMass);
145	} //if ((Tracks_fCharge[t1] * Tracks_fCharge[t2]) == -1)
146	} // if ((Tracks_fChi2[t2] < Chi2Cut) && (pt2 > PtCut))
147	} // for (Int_t t2 = t1 + 1; t2 < Tracks_; t2++)
148	} // if ((Tracks_fChi2[t1] < Chi2Cut) && (pt1 > PtCut))
149	} // for (Int_t t1 = 0; t1 < Tracks_; t1++)
150	} // for (Int_t event = FirstEvent;
151
152	histoFile->Write();
153	histoFile->Close();
154	}
155
156	Float_t MuPlusMuMinusMass(Float_t Px1, Float_t Py1, Float_t Pz1, Float_t Px2, Float_t Py2, Float_t Pz2)
157	{
158	Float_t muonMass = 0.10566;
159	Float_t e1 = TMath::Sqrt(muonMass * muonMass + Px1 * Px1 + Py1 * Py1 + Pz1 * Pz1);
160	Float_t e2 = TMath::Sqrt(muonMass * muonMass + Px2 * Px2 + Py2 * Py2 + Pz2 * Pz2);
161	return (TMath::Sqrt(2.0 * (muonMass * muonMass + e1 * e2 - Px1 * Px2 - Py1 * Py2 - Pz1 * Pz2)));
162	}