Rivet analyses referenceCLEO_1983_I188803Measurement of hadronic cross section at the $\Upsilon(1S)$, 9.461 GeVExperiment: CLEO (CESR) Inspire ID: 188803 Status: VALIDATED Authors:
Beam energies: ANY Run details:
Measurement of the hadronic cross section in $e^+e^-$ collisions by CLEO at the $\Upsilon(1S)$, 9.461 GeV. Source code: CLEO_1983_I188803.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/FinalState.hh"
4
5namespace Rivet {
6
7
8 /// @brief Add a short analysis description here
9 class CLEO_1983_I188803 : public Analysis {
10 public:
11
12 /// Constructor
13 RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_1983_I188803);
14
15
16 /// @name Analysis methods
17 /// @{
18
19 /// Book histograms and initialise projections before the run
20 void init() {
21 // Initialise and register projections
22 declare(FinalState(), "FS");
23
24 // Book histograms
25 book(_c_hadrons, "/TMP/sigma_hadrons");
26 }
27
28
29 /// Perform the per-event analysis
30 void analyze(const Event& event) {
31 const FinalState& fs = apply<FinalState>(event, "FS");
32
33 map<long,int> nCount;
34 int ntotal(0);
35 for (const Particle& p : fs.particles()) {
36 nCount[p.pid()] += 1;
37 ++ntotal;
38 }
39 // mu+mu- + photons
40 if(nCount[-13]==1 and nCount[13]==1 &&
41 ntotal==2+nCount[22])
42 vetoEvent;
43 // everything else
44 else
45 _c_hadrons->fill();
46 }
47
48
49 /// Normalise histograms etc., after the run
50 void finalize() {
51 double fact = crossSection()/ sumOfWeights() /nanobarn;
52 double sig_h = _c_hadrons->val()*fact;
53 double err_h = _c_hadrons->err()*fact;
54 Estimate1DPtr mult;
55 book(mult, 2, 1, 1);
56 for (auto& b : mult->bins()) {
57 if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
58 b.set(sig_h, err_h);
59 }
60 }
61 }
62
63 /// @}
64
65
66 /// @name Histograms
67 /// @{
68 CounterPtr _c_hadrons;
69 /// @}
70
71
72 };
73
74
75 RIVET_DECLARE_PLUGIN(CLEO_1983_I188803);
76
77
78}
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