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
| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/Thrust.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/Hemispheres.hh"
namespace Rivet {
/// @brief Thrust, heavy jet mass, and y3 at 58 GeV
class TOPAZ_1993_I361661 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(TOPAZ_1993_I361661);
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
const FinalState fs;
declare(fs, "FS");
declare(FastJets(fs, FastJets::DURHAM, 0.7), "DurhamJets");
const Thrust thrust(fs);
declare(thrust, "Thrust");
declare(Hemispheres(thrust), "Hemispheres");
// Book histograms
book(_h_thrust, 1, 1, 1);
book(_h_rho , 2, 1, 1);
book(_h_y23 , 3, 1, 1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// First, veto on leptonic events by requiring at least 4 charged FS particles
const FinalState& fs = apply<FinalState>(event, "FS");
const size_t numParticles = fs.particles().size();
// Even if we only generate hadronic events, we still need a cut on numCharged >= 2.
if (numParticles < 2) {
MSG_DEBUG("Failed leptonic event cut");
vetoEvent;
}
// thrust
const Thrust& thrust = apply<Thrust>(event, "Thrust");
_h_thrust->fill(-log(1.-thrust.thrust()));
// jet mass
const Hemispheres& hemi = apply<Hemispheres>(event, "Hemispheres");
_h_rho->fill(-log(hemi.scaledM2high()));
// Jets
const FastJets& durjet = apply<FastJets>(event, "DurhamJets");
if(numParticles>=3)
if (durjet.clusterSeq()) _h_y23->fill(-log(durjet.clusterSeq()->exclusive_ymerge_max(2)));
}
/// Normalise histograms etc., after the run
void finalize() {
normalize(_h_thrust);
normalize(_h_rho);
normalize(_h_y23);
}
//@}
/// @name Histograms
//@{
Histo1DPtr _h_thrust,_h_rho,_h_y23;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(TOPAZ_1993_I361661);
}
|