1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/UnstableParticles.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Hadron Spectra in $e^+e^-$ collisions at 29 GeV
 9  class HRS_1987_I215848 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(HRS_1987_I215848);
14
15
16    /// @name Analysis methods
17    ///@{
18
19    /// Book histograms and initialise projections before the run
20    void init() {
21      declare(UnstableParticles(), "UFS");
22      book(_h_pi ,2,1,1);
23      book(_h_Kp ,3,1,1);
24      book(_h_p  ,4,1,1);
25      book(_h_K0 ,5,1,1);
26      book(_h_lam,6,1,1);
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()) {
34	double xE = 2.*p.E()/sqrtS();
35	const double beta = p.p3().mod() / p.E();
36	if(p.pid()==130 || p.pid()==310)
37	  _h_K0  ->fill(xE,1./beta);
38	else if(p.abspid()==321)
39	  _h_Kp  ->fill(xE,1./beta);
40	else if(p.abspid()==211)
41	  _h_pi ->fill(xE,1./beta);
42	else if(p.abspid()==2212)
43	  _h_p  ->fill(xE,1./beta);
44	else if(p.abspid()==3122)
45	  _h_lam->fill(xE,1./beta);
46      }
47    }
48
49
50    /// Normalise histograms etc., after the run
51    void finalize() {
52      scale(_h_pi , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
53      scale(_h_Kp , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
54      scale(_h_p  , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
55      scale(_h_K0 , crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
56      scale(_h_lam, crossSection()*sqr(sqrtS())/microbarn/sumOfWeights());
57    }
58
59    ///@}
60
61
62    /// @name Histograms
63    ///@{
64    Histo1DPtr _h_pi,_h_Kp,_h_p,_h_K0,_h_lam;
65    ///@}
66
67
68  };
69
70
71  RIVET_DECLARE_PLUGIN(HRS_1987_I215848);
72
73}