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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief BABAR tau lepton to three charged hadrons
///
/// @author Peter Richardson
class BABAR_2007_S7266081 : public Analysis {
public:
RIVET_DEFAULT_ANALYSIS_CTOR(BABAR_2007_S7266081);
void init() {
declare(UnstableParticles(), "UFS");
book(_hist_pipipi_pipipi , 1, 1, 1);
book(_hist_pipipi_pipi , 2, 1, 1);
book(_hist_Kpipi_Kpipi , 3, 1, 1);
book(_hist_Kpipi_Kpi , 4, 1, 1);
book(_hist_Kpipi_pipi , 5, 1, 1);
book(_hist_KpiK_KpiK , 6, 1, 1);
book(_hist_KpiK_KK , 7, 1, 1);
book(_hist_KpiK_piK , 8, 1, 1);
book(_hist_KKK_KKK , 9, 1, 1);
book(_hist_KKK_KK ,10, 1, 1);
book(_weight_total, "/TMP/weight_total");
book(_weight_pipipi, "/TMP/weight_pipipi");
book(_weight_Kpipi, "/TMP/weight_Kpipi");
book(_weight_KpiK, "/TMP/weight_KpiK");
book(_weight_KKK, "/TMP/weight_KKK");
book(tmp11, 11, 1, 1, true);
book(tmp12, 12, 1, 1, true);
book(tmp13, 13, 1, 1, true);
book(tmp14, 14, 1, 1, true);
}
void analyze(const Event& e) {
// Find the taus
Particles taus;
for(const Particle& p : apply<UnstableParticles>(e, "UFS").particles(Cuts::pid==PID::TAU)) {
_weight_total->fill();
Particles pip, pim, Kp, Km;
unsigned int nstable = 0;
// Find the decay products we want
findDecayProducts(p, nstable, pip, pim, Kp, Km);
if (p.pid() < 0) {
swap(pip, pim);
swap(Kp, Km );
}
if (nstable != 4) continue;
// pipipi
if (pim.size() == 2 && pip.size() == 1) {
_weight_pipipi->fill();
_hist_pipipi_pipipi->
fill((pip[0].momentum()+pim[0].momentum()+pim[1].momentum()).mass());
_hist_pipipi_pipi->
fill((pip[0].momentum()+pim[0].momentum()).mass());
_hist_pipipi_pipi->
fill((pip[0].momentum()+pim[1].momentum()).mass());
}
else if (pim.size() == 1 && pip.size() == 1 && Km.size() == 1) {
_weight_Kpipi->fill();
_hist_Kpipi_Kpipi->
fill((pim[0].momentum()+pip[0].momentum()+Km[0].momentum()).mass());
_hist_Kpipi_Kpi->
fill((pip[0].momentum()+Km[0].momentum()).mass());
_hist_Kpipi_pipi->
fill((pim[0].momentum()+pip[0].momentum()).mass());
}
else if (Kp.size() == 1 && Km.size() == 1 && pim.size() == 1) {
_weight_KpiK->fill();
_hist_KpiK_KpiK->
fill((Kp[0].momentum()+Km[0].momentum()+pim[0].momentum()).mass());
_hist_KpiK_KK->
fill((Kp[0].momentum()+Km[0].momentum()).mass());
_hist_KpiK_piK->
fill((Kp[0].momentum()+pim[0].momentum()).mass());
}
else if (Kp.size() == 1 && Km.size() == 2) {
_weight_KKK->fill();
_hist_KKK_KKK->
fill((Kp[0].momentum()+Km[0].momentum()+Km[1].momentum()).mass());
_hist_KKK_KK->
fill((Kp[0].momentum()+Km[0].momentum()).mass());
_hist_KKK_KK->
fill((Kp[0].momentum()+Km[1].momentum()).mass());
}
}
}
void finalize() {
if (_weight_pipipi->val() > 0.) {
scale(_hist_pipipi_pipipi, 1.0 / *_weight_pipipi);
scale(_hist_pipipi_pipi , 0.5 / *_weight_pipipi);
}
if (_weight_Kpipi->val() > 0.) {
scale(_hist_Kpipi_Kpipi , 1.0 / *_weight_Kpipi);
scale(_hist_Kpipi_Kpi , 1.0 / *_weight_Kpipi);
scale(_hist_Kpipi_pipi , 1.0 / *_weight_Kpipi);
}
if (_weight_KpiK->val() > 0.) {
scale(_hist_KpiK_KpiK , 1.0 / *_weight_KpiK);
scale(_hist_KpiK_KK , 1.0 / *_weight_KpiK);
scale(_hist_KpiK_piK , 1.0 / *_weight_KpiK);
}
if (_weight_KKK->val() > 0.) {
scale(_hist_KKK_KKK , 1.0 / *_weight_KKK);
scale(_hist_KKK_KK , 0.5 / *_weight_KKK);
}
tmp11->point(0).setY(100*_weight_pipipi->val()/_weight_total->val(), 100*sqrt(double(_weight_pipipi->val()))/_weight_total->val());
tmp12->point(0).setY(100*_weight_Kpipi->val()/_weight_total->val(), 100*sqrt(double(_weight_Kpipi->val()))/_weight_total->val());
tmp13->point(0).setY(100*_weight_KpiK->val()/_weight_total->val(), 100*sqrt(double(_weight_KpiK->val()))/_weight_total->val());
tmp14->point(0).setY(100*_weight_KKK->val()/_weight_total->val(), 100*sqrt(double(_weight_KKK->val()))/_weight_total->val());
}
private:
Scatter2DPtr tmp11, tmp12, tmp13, tmp14;
// Histograms
Histo1DPtr _hist_pipipi_pipipi, _hist_pipipi_pipi;
Histo1DPtr _hist_Kpipi_Kpipi, _hist_Kpipi_Kpi, _hist_Kpipi_pipi;
Histo1DPtr _hist_KpiK_KpiK, _hist_KpiK_KK, _hist_KpiK_piK;
Histo1DPtr _hist_KKK_KKK, _hist_KKK_KK;
// Weights counters
CounterPtr _weight_total, _weight_pipipi, _weight_Kpipi, _weight_KpiK, _weight_KKK;
void findDecayProducts(const Particle &mother,
unsigned int & nstable,
Particles& pip, Particles& pim,
Particles& Kp, Particles& Km) {
for (const Particle &p : mother.children()) {
long id = p.pid();
if (id == PID::PI0 )
++nstable;
else if (id == PID::K0S)
++nstable;
else if (id == PID::PIPLUS) {
pip.push_back(p);
++nstable;
}
else if (id == PID::PIMINUS) {
pim.push_back(p);
++nstable;
}
else if (id == PID::KPLUS) {
Kp.push_back(p);
++nstable;
}
else if (id == PID::KMINUS) {
Km.push_back(p);
++nstable;
}
else if (!p.children().empty()) {
findDecayProducts(p, nstable, pip, pim, Kp, Km);
}
else ++nstable;
}
}
};
RIVET_DECLARE_ALIASED_PLUGIN(BABAR_2007_S7266081, BABAR_2007_I756323);
}
|