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
| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/Thrust.hh"
namespace Rivet {
/// Event shapes at 7 TeV
class CMS_2011_S8957746 : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(CMS_2011_S8957746);
/// Initialization, called once before running
void init() {
// Projections
const FastJets jets(FinalState((Cuts::etaIn(-5.0, 5.0))), FastJets::ANTIKT, 0.5);
declare(jets, "Jets");
// Book histograms
book(_hist_T_90 ,1, 1, 1);
book(_hist_m_90 ,2, 1, 1);
book(_hist_T_125 ,3, 1, 1);
book(_hist_m_125 ,4, 1, 1);
book(_hist_T_200 ,5, 1, 1);
book(_hist_m_200 ,6, 1, 1);
}
void analyze(const Event& event) {
const double weight = 1.0;
const Jets& jets = apply<FastJets>(event, "Jets").jetsByPt(30.0*GeV);
if (jets.size() < 2 ||
fabs(jets[0].eta()) >= 1.3 ||
fabs(jets[1].eta()) >= 1.3 ||
jets[0].pT() < 90*GeV) {
vetoEvent;
}
std::vector<Vector3> momenta;
for (const Jet& j : jets) {
if (j.abseta() < 1.3) {
Vector3 mom = j.p3();
mom.setZ(0.0);
momenta.push_back(mom);
}
}
if (momenta.size() == 2) {
// We need to use a ghost so that Thrust.calc() doesn't return 1.
momenta.push_back(Vector3(1e-10*MeV, 0., 0.));
}
Thrust thrust;
thrust.calc(momenta);
// The lowest bin also includes the underflow:
const double T = max(log(1-thrust.thrust()), -12.0);
const double M = max(log(thrust.thrustMajor()), -6.0);
if (jets[0].pT()/GeV > 200) {
_hist_T_200->fill(T, weight);
_hist_m_200->fill(M, weight);
} else if (jets[0].pT()/GeV > 125) {
_hist_T_125->fill(T, weight);
_hist_m_125->fill(M, weight);
} else if (jets[0].pT()/GeV > 90) {
_hist_T_90->fill(T, weight);
_hist_m_90->fill(M, weight);
}
}
void finalize() {
normalize(_hist_T_90);
normalize(_hist_m_90);
normalize(_hist_T_125);
normalize(_hist_m_125);
normalize(_hist_T_200);
normalize(_hist_m_200);
}
private:
/// @{
Histo1DPtr _hist_T_90;
Histo1DPtr _hist_m_90;
Histo1DPtr _hist_T_125;
Histo1DPtr _hist_m_125;
Histo1DPtr _hist_T_200;
Histo1DPtr _hist_m_200;
/// @}
};
RIVET_DECLARE_ALIASED_PLUGIN(CMS_2011_S8957746, CMS_2011_I886332);
}
|