Rivet analyses referenceMARKII_1982_I178416Charged particle momentum distributions 5.2, 6.2 and 29 GeVExperiment: MARKII (PEP) Inspire ID: 178416 Status: VALIDATED Authors:
Beams: e- e+ Beam energies: (2.5, 2.5); (1.0, 1.0); (3.2, 3.2); (14.5, 14.5) GeV Run details:
Charged particle momentum distributions for 5.2, 6.2 and 29 GeV. Beam energy must be specified as analysis option "ENERGY" when rivet-merging samples. Source code: MARKII_1982_I178416.cc 1// -*- C++ -*-
2#include "Rivet/Analysis.hh"
3#include "Rivet/Projections/ChargedFinalState.hh"
4
5namespace Rivet {
6
7
8 /// @brief Charged particle spectra at 5.2, 6.5 and 29 GeV
9 class MARKII_1982_I178416 : public Analysis {
10 public:
11
12 /// Constructor
13 RIVET_DEFAULT_ANALYSIS_CTOR(MARKII_1982_I178416);
14
15
16 /// @name Analysis methods
17 ///@{
18
19 /// Book histograms and initialise projections before the run
20 void init() {
21 const ChargedFinalState fs;
22 declare(fs, "FS");
23 unsigned int iloc(0);
24 if(isCompatibleWithSqrtS(5.2))
25 iloc = 1;
26 else if(isCompatibleWithSqrtS(6.5))
27 iloc = 2;
28 else if(isCompatibleWithSqrtS(29.0))
29 iloc = 3;
30 else
31 MSG_ERROR("Beam energy incompatible with analysis.");
32 assert(iloc!=0);
33 book(_h_x,1,1,iloc);
34 }
35
36
37 /// Perform the per-event analysis
38 void analyze(const Event& event) {
39 const ChargedFinalState& fs = apply<ChargedFinalState>(event, "FS");
40 if(fs.particles().size()==2 &&
41 abs(fs.particles()[0].pid())==13 &&
42 abs(fs.particles()[1].pid())==13) vetoEvent;
43 for (const Particle& p : fs.particles()) {
44 const Vector3 mom3 = p.p3();
45 double pp = mom3.mod();
46 double x = 2.*pp/sqrtS();
47 _h_x->fill(x);
48 }
49 }
50
51
52 /// Normalise histograms etc., after the run
53 void finalize() {
54 scale(_h_x,crossSection()*sqr(sqrtS())/sumOfWeights()/microbarn);
55 }
56
57 ///@}
58
59
60 /// @name Histograms
61 ///@{
62 Histo1DPtr _h_x;
63 ///@}
64
65
66 };
67
68
69 RIVET_DECLARE_PLUGIN(MARKII_1982_I178416);
70
71}
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