Rivet analyses referenceBABAR_2009_I797507Measurement of $R_b$ for energies between 10.541 and 11.206 GeVExperiment: BABAR (PEP-II) Inspire ID: 797507 Status: VALIDATED Authors:
Beam energies: (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.3, 5.3); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.4, 5.4); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.5, 5.5); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6); (5.6, 5.6) GeV Run details:
Measurement of $R_b$ in $e^+e^-$ collisions by BaBar for energies between 10.541 and 11.206 GeV. The individual bottom hadronic and muonic cross sections are also outputted to the yoda file so that ratio $R$ can be recalculated if runs are combined. Source code: BABAR_2009_I797507.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 measurement of R_b between 10.541 and 11.206 GeV
10 class BABAR_2009_I797507 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(BABAR_2009_I797507);
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
27 // Book histograms
28 book(_c_hadrons, "/TMP/sigma_hadrons", refData<YODA::BinnedEstimate<string>>(1,1,1));
29 book(_c_muons, "/TMP/sigma_muons" , refData<YODA::BinnedEstimate<string>>(1,1,1));
30 for (const string& en : _c_hadrons.binning().edges<0>()) {
31 double end = std::stod(en)*GeV;
32 if(isCompatibleWithSqrtS(end)) {
33 _ecms = en;
34 break;
35 }
36 }
37 if(_ecms.empty()) MSG_ERROR("Beam energy incompatible with analysis.");
38 }
39
40
41 /// Perform the per-event analysis
42 void analyze(const Event& event) {
43 const FinalState& fs = apply<FinalState>(event, "FS");
44 map<long,int> nCount;
45 int ntotal(0);
46 for (const Particle& p : fs.particles()) {
47 nCount[p.pid()] += 1;
48 ++ntotal;
49 }
50 bool isBottom(false);
51 const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
52 for (const Particle& p : ufs.particles()) {
53 if (PID::isBottomHadron(p.pid())) {
54 isBottom = true;
55 break;
56 }
57 }
58
59 // mu+mu- + photons
60 if(nCount[-13]==1 and nCount[13]==1 &&
61 ntotal==2+nCount[22])
62 _c_muons->fill(_ecms);
63 // everything else
64 else if(isBottom) {
65 _c_hadrons->fill(_ecms);
66 }
67 }
68
69
70 /// Normalise histograms etc., after the run
71 void finalize() {
72 BinnedEstimatePtr<string> mult;
73 book(mult, 1, 1, 1);
74 divide(_c_hadrons,_c_muons,mult);
75 }
76
77 /// @}
78
79
80 /// @name Histograms
81 /// @{
82 BinnedHistoPtr<string> _c_hadrons, _c_muons;
83 string _ecms;
84 /// @}
85
86
87 };
88
89
90 RIVET_DECLARE_PLUGIN(BABAR_2009_I797507);
91
92
93}
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