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
178
179
| // -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Projections/UnstableParticles.hh"
namespace Rivet {
/// @brief D D* and D* D* cross section
class BABAR_2009_I815035 : public Analysis {
public:
/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(BABAR_2009_I815035);
/// @name Analysis methods
///@{
/// Book histograms and initialise projections before the run
void init() {
// Initialise and register projections
declare(FinalState(), "FS");
declare(UnstableParticles(), "UFS");
// Book histograms
book(_c_D0_Dstar ,"/TMP/c_D0_Dstar" );
book(_c_Dplus_Dstar,"/TMP/c_Dplus_Dstar");
book(_c_D_Dstar ,"/TMP/c_D_Dstar" );
book(_c_Dstar_Dstar,"/TMP/c_Dstar_Dstar");
}
void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
for(const Particle &child : p.children()) {
if(child.children().empty()) {
nRes[child.pid()]-=1;
--ncount;
}
else
findChildren(child,nRes,ncount);
}
}
/// Perform the per-event analysis
void analyze(const Event& event) {
const FinalState& fs = apply<FinalState>(event, "FS");
// total hadronic and muonic cross sections
map<long,int> nCount;
int ntotal(0);
for (const Particle& p : fs.particles()) {
nCount[p.pid()] += 1;
++ntotal;
}
// unstable charm analysis
Particles ds = apply<UnstableParticles>(event, "UFS").particles(Cuts::abspid==411 or Cuts::abspid==413 or
Cuts::abspid==421 or Cuts::abspid==423);
for(unsigned int ix=0;ix<ds.size();++ix) {
const Particle& p1 = ds[ix];
int id1 = abs(p1.pid());
// check fs
bool fs = true;
for (const Particle & child : p1.children()) {
if(child.pid()==p1.pid()) {
fs = false;
break;
}
}
if(!fs) continue;
// find the children
map<long,int> nRes = nCount;
int ncount = ntotal;
findChildren(p1,nRes,ncount);
bool matched=false;
int sign = p1.pid()/id1;
// loop over the other fs particles
for(unsigned int iy=ix+1;iy<ds.size();++iy) {
const Particle& p2 = ds[iy];
fs = true;
for (const Particle & child : p2.children()) {
if(child.pid()==p2.pid()) {
fs = false;
break;
}
}
if(!fs) continue;
if(p2.pid()/abs(p2.pid())==sign) continue;
int id2 = abs(p2.pid());
if(!p2.parents().empty() && p2.parents()[0].pid()==p1.pid())
continue;
map<long,int> nRes2 = nRes;
int ncount2 = ncount;
findChildren(p2,nRes2,ncount2);
if(ncount2!=0) continue;
matched=true;
for(auto const & val : nRes2) {
if(val.second!=0) {
matched = false;
break;
}
}
if(matched) {
if((id1==421 && id2==423) || (id1==423 && id2==421)) {
_c_D0_Dstar->fill();
_c_D_Dstar ->fill();
}
else if((id1==411 && id2==413) || (id1==413 && id2==411)) {
_c_Dplus_Dstar->fill();
_c_D_Dstar ->fill();
}
else if((id1==413 && id2==413) || (id1==423 && id2==423)) {
_c_Dstar_Dstar->fill();
}
break;
}
}
if(matched) break;
}
}
/// Normalise histograms etc., after the run
void finalize() {
double fact = crossSection()/ sumOfWeights()/nanobarn;
for(unsigned int ih=1;ih<5;++ih) {
double sigma = 0.0, error = 0.0;
unsigned int ix=1,iy=ih;
if(ih==1) {
sigma = _c_D0_Dstar->val()*fact;
error = _c_D0_Dstar->err()*fact;
}
else if(ih==2) {
sigma = _c_Dplus_Dstar->val()*fact;
error = _c_Dplus_Dstar->err()*fact;
}
else if(ih==3) {
sigma = _c_D_Dstar->val()*fact;
error = _c_D_Dstar->err()*fact;
}
else if(ih==4) {
sigma = _c_Dstar_Dstar->val()*fact;
error = _c_Dstar_Dstar->err()*fact;
ix=2;
iy=1;
}
Scatter2D temphisto(refData(ix, 1, iy));
Scatter2DPtr mult;
book(mult, ix, 1, iy);
for (size_t b = 0; b < temphisto.numPoints(); b++) {
const double x = temphisto.point(b).x();
pair<double,double> ex = temphisto.point(b).xErrs();
pair<double,double> ex2 = ex;
if(ex2.first ==0.) ex2. first=0.0001;
if(ex2.second==0.) ex2.second=0.0001;
if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) {
mult ->addPoint(x, sigma, ex, make_pair(error,error));
}
else {
mult ->addPoint(x, 0., ex, make_pair(0.,.0));
}
}
}
}
///@}
/// @name Histograms
///@{
CounterPtr _c_D0_Dstar,_c_Dplus_Dstar,_c_D_Dstar, _c_Dstar_Dstar;
///@}
};
RIVET_DECLARE_PLUGIN(BABAR_2009_I815035);
}
|