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
| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/IdentifiedFinalState.hh"
#include "Rivet/Projections/VetoedFinalState.hh"
#include "Rivet/Projections/MissingMomentum.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/LeadingParticlesFinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
class ATLAS_2012_I1082009 : public Analysis {
public:
/// @name Constructors etc.
//@{
/// Constructor
ATLAS_2012_I1082009()
: Analysis("ATLAS_2012_I1082009")
{ }
//@}
public:
/// @name Analysis methods
//@{
/// Book histograms and initialise projections before the run
void init() {
// Input for the jets: No neutrinos, no muons
VetoedFinalState veto;
veto.addVetoPairId(PID::MUON);
veto.vetoNeutrinos();
FastJets jets(veto, FastJets::ANTIKT, 0.6);
declare(jets, "jets");
// unstable final-state for D*
declare(UnstableParticles(), "UFS");
book(_weight25_30, "_weight_25_30");
book(_weight30_40, "_weight_30_40");
book(_weight40_50, "_weight_40_50");
book(_weight50_60, "_weight_50_60");
book(_weight60_70, "_weight_60_70");
book(_weight25_70, "_weight_25_70");
book(_h_pt25_30 , 8,1,1);
book(_h_pt30_40 , 9,1,1);
book(_h_pt40_50 ,10,1,1);
book(_h_pt50_60 ,11,1,1);
book(_h_pt60_70 ,12,1,1);
book(_h_pt25_70 ,13,1,1);
}
/// Perform the per-event analysis
void analyze(const Event& event) {
// get the jets
Jets jets;
for (const Jet& jet : apply<FastJets>(event, "jets").jetsByPt(25.0*GeV)) {
if ( jet.abseta() < 2.5 ) jets.push_back(jet);
}
// get the D* mesons
const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
Particles Dstar;
for (const Particle& p : ufs.particles()) {
const int id = p.abspid();
if(id==413) Dstar.push_back(p);
}
// loop over the jobs
for (const Jet& jet : jets ) {
double perp = jet.perp();
bool found = false;
double z(0.);
if(perp<25.||perp>70.) continue;
for(const Particle & p : Dstar) {
if(p.perp()<7.5) continue;
if(deltaR(p, jet.momentum())<0.6) {
Vector3 axis = jet.p3().unit();
z = axis.dot(p.p3())/jet.E();
if(z<0.3) continue;
found = true;
break;
}
}
_weight25_70->fill();
if(found) _h_pt25_70->fill(z);
if(perp>=25.&&perp<30.) {
_weight25_30->fill();
if(found) _h_pt25_30->fill(z);
}
else if(perp>=30.&&perp<40.) {
_weight30_40->fill();
if(found) _h_pt30_40->fill(z);
}
else if(perp>=40.&&perp<50.) {
_weight40_50->fill();
if(found) _h_pt40_50->fill(z);
}
else if(perp>=50.&&perp<60.) {
_weight50_60->fill();
if(found) _h_pt50_60->fill(z);
}
else if(perp>=60.&&perp<70.) {
_weight60_70->fill();
if(found) _h_pt60_70->fill(z);
}
}
}
/// Normalise histograms etc., after the run
void finalize() {
scale(_h_pt25_30,1./ *_weight25_30);
scale(_h_pt30_40,1./ *_weight30_40);
scale(_h_pt40_50,1./ *_weight40_50);
scale(_h_pt50_60,1./ *_weight50_60);
scale(_h_pt60_70,1./ *_weight60_70);
scale(_h_pt25_70,1./ *_weight25_70);
}
//@}
private:
/// @name Histograms
//@{
CounterPtr _weight25_30,_weight30_40,_weight40_50;
CounterPtr _weight50_60,_weight60_70,_weight25_70;
Histo1DPtr _h_pt25_30;
Histo1DPtr _h_pt30_40;
Histo1DPtr _h_pt40_50;
Histo1DPtr _h_pt50_60;
Histo1DPtr _h_pt60_70;
Histo1DPtr _h_pt25_70;
//@}
};
// The hook for the plugin system
RIVET_DECLARE_PLUGIN(ATLAS_2012_I1082009);
}
|