Rivet analyses referenceCLEOC_2008_I777917Measurement of charm final-states, the total hadronic cross section and $R$ for energies between 3.92 and 4.26 GeVExperiment: CLEOC (CESR) Inspire ID: 777917 Status: VALIDATED Authors:
Beam energies: ANY Run details:
Measurement of charm final-states, the total hadronic cross section and $R$ for energies between 3.92 and 4.26 GeV The muonic cross section is also outputted to the yoda file so that ratio $R$ can be recalcuated if runs are combined. Source code: CLEOC_2008_I777917.cc 1#// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/FinalState.hh"
4#include "Rivet/Projections/UnstableParticles.hh"
5
6namespace Rivet {
7
8
9 /// @brief Charm cross sections 3.92 and 4.26 GeV
10 class CLEOC_2008_I777917 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(CLEOC_2008_I777917);
15
16
17 /// @name Analysis methods
18 /// @{
19
20 /// Book histograms and initialise projections before the run
21 void init() {
22
23 // Initialise and register projections
24 declare(FinalState(), "FS");
25 declare(UnstableParticles(), "UFS");
26 for(unsigned int ix=0;ix<3;++ix)
27 for(unsigned int iy=0;iy<3;++iy)
28 book(_sigma_DD[ix][iy],1+ix,1,1+iy);
29 for(unsigned int ix=0;ix<2;++ix) {
30 book(_sigma_DDpi[ix],4,1,1+ix);
31 book(_sigma_DDX [ix],5,1,1+ix);
32 }
33 book(_sigma_R[0],"TMP/hadron",refData<YODA::BinnedEstimate<int>>(6,1,1));
34 book(_sigma_R[1],"TMP/muon",refData<YODA::BinnedEstimate<int>>(6,1,1));
35 book(_sigma_cc,6,1,1);
36 }
37
38 void findChildren(const Particle & p,map<long,int> & nRes, int &ncount) {
39 for (const Particle &child : p.children()) {
40 if(child.children().empty()) {
41 nRes[child.pid()]-=1;
42 --ncount;
43 }
44 else
45 findChildren(child,nRes,ncount);
46 }
47 }
48
49
50 /// Perform the per-event analysis
51 void analyze(const Event& event) {
52 const FinalState& fs = apply<FinalState>(event, "FS");
53 // total hadronic and muonic cross sections
54 map<long,int> nCount;
55 int ntotal(0);
56 for (const Particle& p : fs.particles()) {
57 nCount[p.pid()] += 1;
58 ++ntotal;
59 }
60 // mu+mu- + photons
61 if(nCount[-13]==1 and nCount[13]==1 &&
62 ntotal==2+nCount[22]) {
63 _sigma_R[1]->fill(round(sqrtS()/MeV));
64 return;
65 }
66 else
67 _sigma_R[0] ->fill(round(sqrtS()/MeV));
68 // identified final state with D mesons
69 const FinalState& ufs = apply<UnstableParticles>(event, "UFS");
70 for(unsigned int ix=0;ix<ufs.particles().size();++ix) {
71 const Particle& p1 = ufs.particles()[ix];
72 int id1 = abs(p1.pid());
73 if(id1 != 411 && id1 != 413 && id1 != 421 && id1 != 423 &&
74 id1 != 431 && id1 != 433)
75 continue;
76 // check fs
77 bool fs = true;
78 for (const Particle & child : p1.children()) {
79 if(child.pid()==p1.pid()) {
80 fs = false;
81 break;
82 }
83 }
84 if(!fs) continue;
85 // find the children
86 map<long,int> nRes = nCount;
87 int ncount = ntotal;
88 findChildren(p1,nRes,ncount);
89 bool matched=false;
90 int sign = p1.pid()/id1;
91 // loop over the other fs particles
92 for(unsigned int iy=ix+1;iy<ufs.particles().size();++iy) {
93 const Particle& p2 = ufs.particles()[iy];
94 fs = true;
95 for (const Particle & child : p2.children()) {
96 if(child.pid()==p2.pid()) {
97 fs = false;
98 break;
99 }
100 }
101 if(!fs) continue;
102 if(p2.pid()/abs(p2.pid())==sign) continue;
103 int id2 = abs(p2.pid());
104 if(id2 != 411 && id2 != 413 && id2 != 421 && id2 != 423 &&
105 id2 != 431 && id2 != 433)
106 continue;
107 if(!p2.parents().empty() && p2.parents()[0].pid()==p1.pid())
108 continue;
109 if((id1==411 || id1==421 || id1==431) && (id2==411 || id2==421 || id2==431 )) {
110 _sigma_DDX[1]->fill(round(sqrtS()/MeV));
111 _sigma_cc->fill(round(sqrtS()/MeV));
112 }
113 map<long,int> nRes2 = nRes;
114 int ncount2 = ncount;
115 findChildren(p2,nRes2,ncount2);
116 if(ncount2==0) {
117 matched=true;
118 for(auto const & val : nRes2) {
119 if(val.second!=0) {
120 matched = false;
121 break;
122 }
123 }
124 if(matched) {
125 if(id1==411 && id2==411) {
126 _sigma_DD[1][0]->fill(round(sqrtS()/MeV));
127 _sigma_DDX[0] ->fill(round(sqrtS()/MeV));
128 }
129 else if(id1==421&& id2==421) {
130 _sigma_DD[0][0]->fill(round(sqrtS()/MeV));
131 _sigma_DDX[0] ->fill(round(sqrtS()/MeV));
132 }
133 else if(id1==431&& id2==431) {
134 _sigma_DD[2][0]->fill(round(sqrtS()/MeV));
135 }
136 else if(id1==413 && id2==413) {
137 _sigma_DD[1][2]->fill(round(sqrtS()/MeV));
138 }
139 else if(id1==423&& id2==423) {
140 _sigma_DD[0][2]->fill(round(sqrtS()/MeV));
141 }
142 else if(id1==433&& id2==433) {
143 _sigma_DD[2][2]->fill(round(sqrtS()/MeV));
144 }
145 else if((id1==421 && id2==423) ||
146 (id1==423 && id2==421)) {
147 _sigma_DD[0][1]->fill(round(sqrtS()/MeV));
148 }
149 else if((id1==411 && id2==413) ||
150 (id1==413 && id2==411)) {
151 _sigma_DD[1][1]->fill(round(sqrtS()/MeV));
152 }
153 else if((id1==431 && id2==433) ||
154 (id1==433 && id2==431)) {
155 _sigma_DD[2][1]->fill(round(sqrtS()/MeV));
156 }
157 }
158 }
159 else if(ncount2==1) {
160 int ipi=0;
161 if(nRes2[111]==1 && nRes2[211]==0 && nRes[-211]==0 )
162 ipi = 111;
163 else if(nRes2[111]==0 && nRes2[211]==1 && nRes[-211]==0 )
164 ipi = 211;
165 else if(nRes2[111]==0 && nRes2[211]==0 && nRes[-211]==1 )
166 ipi =-211;
167 if(ipi==0) continue;
168 matched=true;
169 for(auto const & val : nRes2) {
170 if(val.first==ipi)
171 continue;
172 else if(val.second!=0) {
173 matched = false;
174 break;
175 }
176 }
177 if(matched) {
178 bool Ddecay = false;
179 Particle mother = p1;
180 while (!mother.parents().empty()) {
181 mother = mother.parents()[0];
182 if(PID::isCharmMeson(mother.pid()) && mother.pid()!=p1.pid()) {
183 Ddecay = true;
184 break;
185 }
186 }
187 mother = p2;
188 while (!mother.parents().empty()) {
189 mother = mother.parents()[0];
190 if(PID::isCharmMeson(mother.pid()) && mother.pid()!=p1.pid()) {
191 Ddecay = true;
192 break;
193 }
194 }
195 if(Ddecay) continue;
196 if((id1==413 || id1==423 ) &&
197 (id2==413 || id2==423 )) {
198 _sigma_DDpi[1]->fill(round(sqrtS()/MeV));
199 }
200 else if((id1==411 || id1==421 ) &&
201 (id2==413 || id2==423 )) {
202 _sigma_DDpi[0]->fill(round(sqrtS()/MeV));
203 }
204 else if((id1==413 || id1==423 ) &&
205 (id2==411 || id2==421 )) {
206 _sigma_DDpi[0]->fill(round(sqrtS()/MeV));
207 }
208 }
209 }
210 }
211 }
212 }
213
214 /// Normalise histograms etc., after the run
215 void finalize() {
216 // cross sections
217 double fact = crossSection()/picobarn/ sumOfWeights();
218 for(unsigned int ix=0;ix<3;++ix)
219 for(unsigned int iy=0;iy<3;++iy)
220 scale(_sigma_DD[ix][iy],fact);
221 for(unsigned int ix=0;ix<2;++ix) {
222 scale(_sigma_DDpi[ix],fact);
223 scale(_sigma_DDX [ix],fact*1e-3); // this one in nb
224 }
225 BinnedEstimatePtr<int> tmp;
226 book(tmp,6,1,2);
227 divide(_sigma_R[0],_sigma_R[1],tmp);
228 scale(_sigma_cc,fact*1e-3);
229 }
230
231 /// @}
232
233
234 /// @name Histograms
235 /// @{
236 BinnedHistoPtr<int> _sigma_DD[3][3];
237 BinnedHistoPtr<int> _sigma_DDpi[2];
238 BinnedHistoPtr<int> _sigma_DDX[2];
239 BinnedHistoPtr<int> _sigma_R[2],_sigma_cc;
240 /// @}
241
242
243 };
244
245
246 RIVET_DECLARE_PLUGIN(CLEOC_2008_I777917);
247
248
249}
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