Rivet analyses referenceMARKII_1985_I207785$K^0$ and $K^+$ production at 29 GeVExperiment: MARKII (PEP) Inspire ID: 207785 Status: VALIDATED Authors:
Beam energies: (14.5, 14.5) GeV Run details:
Rate and spectrum for $K^0$ and $K^+$ production at 29 GeV measured by the MARKII collaboration. Source code: MARKII_1985_I207785.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 K+/K0 specta at 29 GeV
10 class MARKII_1985_I207785 : public Analysis {
11 public:
12
13 /// Constructor
14 RIVET_DEFAULT_ANALYSIS_CTOR(MARKII_1985_I207785);
15
16
17 /// @name Analysis methods
18 ///@{
19
20 /// Book histograms and initialise projections before the run
21 void init() {
22 // Initialise and register projections
23 declare(UnstableParticles(), "UFS");
24 //Histograms
25 book(_h_K0,2,1,1);
26 book(_h_Kp,4,1,1);
27 }
28
29
30 /// Perform the per-event analysis
31 void analyze(const Event& event) {
32 const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
33 for (const Particle& p : ufs.particles(Cuts::abspid==321 or Cuts::abspid==310 or Cuts::abspid==130)) {
34 const double xp = 2.*p.p3().mod()/sqrtS();
35 const double beta = p.p3().mod() / p.E();
36 if(p.abspid()==321)
37 _h_Kp->fill(xp,1./beta);
38 else
39 _h_K0->fill(xp,1./beta);
40 }
41 }
42
43
44 /// Normalise histograms etc., after the run
45 void finalize() {
46 scale(_h_K0, 1./sumOfWeights());
47 scale(_h_Kp, 1./sumOfWeights());
48 }
49
50 ///@}
51
52
53 /// @name Histograms
54 ///@{
55 Histo1DPtr _h_K0,_h_Kp;
56 ///@}
57
58
59 };
60
61
62 RIVET_DECLARE_PLUGIN(MARKII_1985_I207785);
63
64}
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