Rivet analyses referenceCMD3_2016_I1385598Cross section for $e^+e^-\to p\bar{p}$ between the threshold and 2 GeVExperiment: CMD3 (VEPP-2M) Inspire ID: 1385598 Status: VALIDATED Authors:
Beam energies: ANY Run details:
1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/FinalState.hh"
4
5
6namespace Rivet {
7
8
9 /// @brief Add a short analysis description here
10 class CMD3_2016_I1385598 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(CMD3_2016_I1385598);
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
26 // Book histograms
27 book(_nproton, "TMP/proton");
28
29 }
30
31
32 /// Perform the per-event analysis
33 void analyze(const Event& event) {
34 const FinalState& fs = apply<FinalState>(event, "FS");
35 if (fs.particles().size() != 2) vetoEvent;
36 for (const Particle& p : fs.particles()) {
37 if (p.abspid() != PID::PROTON) vetoEvent;
38 }
39 _nproton->fill();
40 }
41
42
43 /// Normalise histograms etc., after the run
44 void finalize() {
45 scale(_nproton, crossSection()/ sumOfWeights() /nanobarn);
46 BinnedEstimatePtr<string> mult;
47 book(mult, 1, 1, 6);
48 for (auto& b : mult->bins()) {
49 const double sqrts = std::stod(b.xEdge().substr(0, 4));
50 if (isCompatibleWithSqrtS(sqrts*MeV)) {
51 b.set(_nproton->val(), _nproton->err());
52 }
53 }
54 }
55
56 /// @}
57
58
59 /// @name Histograms
60 /// @{
61 CounterPtr _nproton;
62 /// @}
63
64
65 };
66
67
68 RIVET_DECLARE_PLUGIN(CMD3_2016_I1385598);
69
70
71}
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