-
Notifications
You must be signed in to change notification settings - Fork 0
/
LcPlusMinus.C
153 lines (127 loc) · 4.95 KB
/
LcPlusMinus.C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/* ************************************************** *
* Not so simple macro for plotting of invarant mass *
* of the Lambda_c baryon from an ntuple *
* ************************************************** */
#include <iostream>
#include <cmath>
#include "TStyle.h"
#include "TCanvas.h"
#include "TH1D.h"
#include "TFile.h"
#include "TNtuple.h"
#include "TCut.h"
#include "TF1.h"
#include "TLegend.h"
#include "TColor.h"
#include "TROOT.h"
#include "TText.h"
#include "TString.h"
using std::cout;
using std::endl;
void LcPlusMinus()
{
gStyle->SetOptStat(0);
gStyle->SetLabelFont(132, "x");
gStyle->SetLabelFont(132, "y");
gStyle->SetTitleFont(132, "x");
gStyle->SetTitleFont(132, "y");
gStyle->SetLegendFont(132);
TFile *f = new TFile("centralityWeightpicoHFLambdaCMaker.root");
TNtuple *secondary = static_cast<TNtuple*>(f->Get("secondary"));
TCanvas *C = new TCanvas("C", "mass plot", 500, 500);
TH1D* sig = new TH1D("sig", "", 40, 2.1, 2.5);
TH1D* bkg = new TH1D("bkg", "", 40, 2.1, 2.5);
sig->Sumw2();
bkg->Sumw2();
// -- set cuts
const int LcPlus = (0 <<2) | (1 <<1) | 1; // K,p,pi
const int LcMinus = (1 <<2) | (0 <<1) | 0;
TCut sigCut = Form("charges == %d || charges == %d", LcPlus, LcMinus);
TCut LcPlusCut = Form("charges == %d", LcPlus);
TCut LcMinusCut = Form("charges == %d", LcMinus);
const int protonMap = 1 <<1;
TCut protonCut = Form("(charges & %d) != 0", protonMap);
TCut centralityCut = "centrality > 0.1 && centrality < 7"; // centrality 10 - 80 %
TCut ptCut = "pt > 3";
TCut allCuts = centralityCut && ptCut;
TCut centralityWeight = "centralityCorrection";
// -- fill the histograms
secondary->Project("sig", "m", (allCuts && LcMinusCut)*centralityWeight );
secondary->Project("bkg", "m", (allCuts && LcMinusCut && "m <= 2.25 || m >= 2.32")*centralityWeight );
// bkg->Scale(1./3.);
TF1 *line = new TF1("line", "[0] + [1]*x");
TF1 *gaussPlusLine = new TF1("gaussPlusLine", "[0] + [1]*x + [2]*TMath::Gaus(x,[3],[4],1)");
bkg->Fit(line, "", "", 2.1, 2.5);
double offset = line->GetParameter(0);
double slope = line->GetParameter(1);
// const double LcMass = 2.28646;
const double LcMass = 2.28295;
gaussPlusLine->FixParameter(0,offset);
gaussPlusLine->FixParameter(1,slope);
gaussPlusLine->FixParameter(3,LcMass);
gaussPlusLine->SetParameter(2,1);
gaussPlusLine->FixParameter(4,1.10012e-02);
sig->Fit(gaussPlusLine, "", "", 2.1, 2.5);
// -- Drawing
sig->GetXaxis()->SetTitle("#font[12]{m}_{p^{-}K^{+}#pi^{-}} (GeV/#font[12]{c}^{2})");
sig->GetXaxis()->CenterTitle();
sig->GetXaxis()->SetLabelSize(0.04);
sig->GetXaxis()->SetTitleSize(0.055);
sig->GetXaxis()->SetTitleOffset(0.8);
// sig->GetXaxis()->SetTickLength(0.001);
sig->GetYaxis()->SetTitle("#font[12]{N}/(10 MeV/#font[12]{c}^{2})");
sig->GetYaxis()->CenterTitle();
sig->GetYaxis()->SetLabelSize(0.04);
sig->GetYaxis()->SetTitleSize(0.055);
sig->GetYaxis()->SetTitleOffset(0.8);
// sig->GetYaxis()->SetRangeUser(17, 95);
sig->SetMarkerStyle(20);
sig->SetLineColor(kBlack);
bkg->SetMarkerStyle(20);
bkg->SetMarkerColor(kBlue-7);
bkg->SetLineColor(kBlue-7);
bkg->GetFunction("line")->SetLineColor(kRed);
bkg->GetFunction("line")->SetLineStyle(2);
bkg->GetFunction("line")->SetNpx(10000);
sig->GetFunction("gaussPlusLine")->SetLineColor(kRed);
sig->GetFunction("gaussPlusLine")->SetNpx(10000);
sig->Draw("E");
bkg->Draw("Esame");
TLegend *leg = new TLegend(0.6,0.7,0.89,0.89);
leg->SetFillStyle(0);
leg->SetBorderSize(0);
leg->SetHeader("#bar{#Lambda_{c}}");
leg->AddEntry(sig, "Signal", "pl");
leg->AddEntry(bkg, "Side band", "pl");
leg->Draw();
TLegend *dataSet = new TLegend(0., 0.8, 0.6, 0.89);
dataSet->SetFillStyle(0);
dataSet->SetBorderSize(0);
dataSet->AddEntry("", "#font[22]{Au+Au 200 GeV, 10-80%}","");
dataSet->AddEntry("","#font[12]{p}_{T} > 3 GeV/#font[12]{c}","");
dataSet->Draw();
// -- yield calculation
const float min = 2.27;
const float max = 2.30;
// -- get part of the Gauss curve
TF1 *normGaus = new TF1("normGaus", "TMath::Gaus(x,[0],[1],1)");
double mean = gaussPlusLine->GetParameter(3);
double width= gaussPlusLine->GetParameter(4);
normGaus->SetParameter(0,mean);
normGaus->SetParameter(1,width);
double norm = normGaus->Integral(min, max);
int minBin = sig->FindBin(min) + 1;
int maxBin = sig->FindBin(max);
cout << "integral from " << sig->GetBinCenter(minBin) - 0.005 << " to " << sig->GetBinCenter(maxBin) + 0.005 << endl;
float NSig = sig->Integral(minBin,maxBin);
float NBkg = 100.*line->Integral(min, max);
float offsetError = line->GetParError(0)/offset;
float slopeError = line->GetParError(0)/slope;
float Nlc = (NSig - NBkg)/norm;
float error = std::sqrt(NSig + NBkg*NBkg*offsetError*offsetError)/norm;
cout << "N Sig = " << NSig << endl;
cout << "N Bkg = " << NBkg << endl;
cout << "norm = " << norm << endl;
cout << "N Lambda_c = " << round(Nlc) << endl;
cout << "sigma = " << round(error) << endl;
}