1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief R for energies between 3.1 and 4.8 GeV
 9  class PLUTO_1977_I110272 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(PLUTO_1977_I110272);
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      book(_c_muons  ,"/TMP/sigma_muons");
27
28    }
29
30
31    /// Perform the per-event analysis
32    void analyze(const Event& event) {
33      const FinalState& fs = apply<FinalState>(event, "FS");
34
35      map<long,int> nCount;
36      int ntotal(0);
37      for (const Particle& p : fs.particles()) {
38	nCount[p.pid()] += 1;
39	++ntotal;
40      }
41      // mu+mu- + photons
42      if(nCount[-13]==1 and nCount[13]==1 &&
43	 ntotal==2+nCount[22])
44	_c_muons->fill();
45      // everything else
46      else
47	_c_hadrons->fill();
48    }
49
50
51    /// Normalise histograms etc., after the run
52    void finalize() {
53      Estimate0D R = *_c_hadrons/ *_c_muons;
54      double fact = crossSection()/ sumOfWeights() /picobarn;
55      double sig_h = _c_hadrons->val()*fact;
56      double err_h = _c_hadrons->err()*fact;
57      double sig_m = _c_muons  ->val()*fact;
58      double err_m = _c_muons  ->err()*fact;
59      Estimate1DPtr hadrons;
60      book(hadrons, "sigma_hadrons");
61      Estimate1DPtr muons;
62      book(muons,   "sigma_muons"  );
63      Estimate1DPtr mult;
64      book(mult, 2, 1, 1);
65      for (auto& b : mult->bins()) {
66        if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
67          b.set(R.val(), R.errPos());
68          hadrons->bin(b.index()).set(sig_h, err_h);
69          muons  ->bin(b.index()).set(sig_m, err_m);
70        }
71      }
72    }
73
74    /// @}
75
76
77    /// @name Histograms
78    /// @{
79    CounterPtr _c_hadrons, _c_muons;
80    /// @}
81
82
83  };
84
85
86  RIVET_DECLARE_PLUGIN(PLUTO_1977_I110272);
87
88
89}