1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 //---------------------------------------------------------------------
19 // Jet Control Plots class
20 // manages histograms with control plots of jet searching
21 // Stores the output of a jet algorithm
22 // Author: jgcn@mda.cinvestav.mx
23 //---------------------------------------------------------------------
31 #include "AliJetReader.h"
34 #include "AliJetControlPlots.h"
35 ClassImp(AliJetControlPlots)
37 ////////////////////////////////////////////////////////////////////////
39 AliJetControlPlots::AliJetControlPlots():
56 // Default constructor
59 fNJetsH = new TH1I("fNJetsH","Number of Jets",12,0,11);
60 SetProperties(fNJetsH,"Number of jets","Entries");
62 fMultH = new TH1I("fMultH","Multiplicity of Jets",22,0,21);
63 SetProperties(fMultH,"Multiplicity of jets","Entries");
65 fInJetH = new TH1D("fInJetH","Percentage of particles in jets",50,0,1);
66 SetProperties(fInJetH,"percentage of particles in jets","Entries");
69 fPtH = new TH1D("fPtH","Pt of Jets",50,0.,200.);
70 SetProperties(fPtH,"P_{t} [GeV]","Entries");
72 fEtaH = new TH1D("fEtaH","Pseudorapidity of Jets",30,-1.5,1.5);
73 SetProperties(fEtaH,"#eta","Entries");
75 fEneH = new TH1D("fEneH","Energy of Jets",50,0.,200.);
76 SetProperties(fEneH,"Energy [GeV]","Entries");
78 fPhiH = new TH1D("fPhiH","Azimuthal angle of Jets",
79 60,0.,2.0*TMath::Pi());
80 SetProperties(fPhiH,"#phi","Entries");
83 fFragH = new TH1D("fFragH","Leading Jet Fragmentation (selected tracks)",
85 SetProperties(fFragH,"x=E_{i}/E_{JET}","1/N_{JET}dN_{ch}/dx");
87 fFragrH = new TH1D("fFragrH","Leading Jet Fragmentation (rejected tracks)",
89 SetProperties(fFragrH,"x=E_{i}/E_{JET}","1/N_{JET}dN_{ch}/dx");
92 fFragLnH = new TH1D("fFragLnH","Leading Jet Fragmentation (selected tracks)",
94 SetProperties(fFragLnH,"#xi=ln(E_{JET}/E_{i})","1/N_{JET}dN_{ch}/d#xi");
96 fFragLnrH = new TH1D("fFragLnrH",
97 "Leading Jet Fragmentation (rejected tracks)",
99 SetProperties(fFragLnrH,"#xi=ln(E_{JET}/E_{i})","1/N_{JET}dN_{ch}/d#xi");
102 fShapeH = new TH1D("fShapeH","Leading Jet Shape (selected tracks)",
104 SetProperties(fShapeH,"r","1/N_{JET}#Sigma P_{T}(0,r)/P_{T}(0,R)");
106 fShaperH = new TH1D("fShaperH","Leading Jet Shape (rejected tracks)",
108 SetProperties(fShaperH,"r","1/N_{JET}#Sigma P_{T}(0,r)/P_{T}(0,R)");
111 ////////////////////////////////////////////////////////////////////////
113 AliJetControlPlots::~AliJetControlPlots()
131 ////////////////////////////////////////////////////////////////////////
133 void AliJetControlPlots::FillHistos(AliJet *j)
135 // Fills the histograms
136 Int_t nj = j->GetNJets();
140 // kinematics, occupancy and multiplicities
141 TArrayI mj = j->GetMultiplicities();
143 for (Int_t i=0;i<nj;i++) {
145 fMultH->Fill(mj[i],1);
146 fPtH->Fill(j->GetPt(i),1);
147 fEtaH->Fill(j->GetEta(i),1);
148 fEneH->Fill(j->GetE(i),1);
149 fPhiH->Fill(j->GetPhi(i),1);
151 fInJetH->Fill(((Double_t) mjTot)/((Double_t) j->GetNinput()),1);
153 // fragmentation of leading jet
154 TArrayI inJet = j->GetInJet();
155 TArrayF etain = j->GetEtaIn();
156 TArrayF ptin = j->GetPtIn();
157 for(Int_t i=0;i<(inJet.GetSize());i++) {
158 Float_t t1 = TMath::Tan(2.0*TMath::ATan(TMath::Exp(-etain[i])));
159 Float_t ene = ptin[i]*TMath::Sqrt(1.+1./(t1*t1));
161 fFragH->Fill((Float_t) ene/(j->GetE(0)),1);
162 fFragLnH->Fill((Float_t) TMath::Log((j->GetE(0))/ene),1);
164 if (inJet[i] == -1) {
165 fFragrH->Fill((Float_t) ene/(j->GetE(0)),1);
166 fFragLnrH->Fill((Float_t) TMath::Log((j->GetE(0))/ene),1);
170 // shape of leading jet
171 // * CAREFUL: depends on number of bins and bin sizes
172 // of shape histo. HARDWIRED at the moment *
173 // Plot against dr NOT dr/R_jet!!!
174 TArrayF phiin = j->GetPhiIn();
175 Float_t rptS[20], rptR[20];
176 for(Int_t i=0;i<20;i++) rptS[i]=rptR[i]=0.0;
178 for(Int_t i=0;i<inJet.GetSize();i++) {
179 if (inJet[i] == 1 || inJet[i] == -1) {
180 Float_t deta = etain[i] - j->GetEta(0);
181 Float_t dphi = phiin[i] - j->GetPhi(0);
182 if (dphi < -TMath::Pi()) dphi= -dphi - 2.0 * TMath::Pi();
183 if (dphi > TMath::Pi()) dphi = 2.0 * TMath::Pi() - dphi;
184 Float_t dr = TMath::Sqrt(deta * deta + dphi * dphi);
186 Int_t bin = (Int_t) TMath::Floor(dr/0.05);
187 if (inJet[i] == 1) rptS[bin]+=ptin[i]/(j->GetPt(0));
188 if (inJet[i] == -1) rptR[bin]+=ptin[i]/(j->GetPt(0));
194 for (Int_t i=0;i<20;i++) {
198 fShapeH->Fill(r,ptS);
199 fShaperH->Fill(r,ptR);
204 ////////////////////////////////////////////////////////////////////////
206 void AliJetControlPlots::Normalize()
208 // *CAREFUL: depends on histogram number of bins
209 if (fNJetT == 0) return;
210 fFragH->Scale(20.0/((Double_t) fNJetT));
211 fFragLnH->Scale(2.0/((Double_t) fNJetT));
212 fFragrH->Scale(20.0/((Double_t) fNJetT));
213 fFragLnrH->Scale(2.0/((Double_t) fNJetT));
214 fShapeH->Scale(1.0/((Double_t) fNJetT));
215 fShaperH->Scale(1.0/((Double_t) fNJetT));
218 ////////////////////////////////////////////////////////////////////////
220 void AliJetControlPlots::PlotHistos()
223 gStyle->SetOptStat(kFALSE);
224 gStyle->SetOptTitle(kFALSE);
226 TCanvas *c = new TCanvas("c","AliJetControlPlots",50,200,1200,700);
228 c->cd(1); fNJetsH->Draw("e1");
229 c->cd(2); fMultH->Draw("e1");
230 c->cd(3); fInJetH->Draw("e1");
231 c->cd(4); fPtH->Draw("e1");
232 c->cd(5); fEtaH->Draw("e1");
233 c->cd(6); fPhiH->Draw("e1");
234 c->cd(7); fEneH->Draw("e1");
235 c->cd(8); fFragLnH->Draw("e1");
236 c->cd(9); fFragLnrH->Draw("e1");
237 c->cd(10); fShapeH->Draw("e1");
238 c->cd(11); fShaperH->Draw("e1");
241 ////////////////////////////////////////////////////////////////////////
243 void AliJetControlPlots::SetProperties(TH1* h,const char* x, const char* y) const
245 // Sets the histogram style properties
246 h->SetMarkerStyle(20);
247 h->SetMarkerSize(.5);
248 h->SetMarkerColor(2);