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Rivet analyses reference

CLEO_2006_I700665

Hadronic cross section at 3.773 GeV
Experiment: CLEO (CESR)
Inspire ID: 1650066
Status: VALIDATED
Authors:
  • Peter Richardson
References:
  • Phys.Rev.Lett. 96 (2006) 092002, 2006
Beams: e- e+
Beam energies: ANY
Run details:
  • e+ e- to hadrons

Haronic cross section at 3.773 measured by CLEO.

Source code: CLEO_2006_I700665.cc
 1// -*- C++ -*-
 2#include "Rivet/Analysis.hh"
 3#include "Rivet/Projections/FinalState.hh"
 4
 5namespace Rivet {
 6
 7
 8  /// @brief Add a short analysis description here
 9  class CLEO_2006_I700665 : public Analysis {
10  public:
11
12    /// Constructor
13    RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_2006_I700665);
14
15
16    /// @name Analysis methods
17    /// @{
18
19    /// Book histograms and initialise projections before the run
20    void init() {
21      declare(FinalState(), "FS");
22      book(_c_hadrons, "/TMP/sigma_hadrons");
23    }
24
25
26    /// Perform the per-event analysis
27    void analyze(const Event& event) {
28      const FinalState& fs = apply<FinalState>(event, "FS");
29
30      map<long,int> nCount;
31      int ntotal(0);
32      for (const Particle& p : fs.particles()) {
33        nCount[p.pid()] += 1;
34        ++ntotal;
35      }
36      // mu+mu- + photons
37      if(nCount[-13]==1 and nCount[13]==1 &&
38         ntotal==2+nCount[22])
39        vetoEvent;
40      // everything else
41      else {
42        _c_hadrons->fill();
43      }
44    }
45
46
47    /// Normalise histograms etc., after the run
48    void finalize() {
49      double fact = crossSection()/ sumOfWeights() /nanobarn;
50      double sig_h = _c_hadrons->val()*fact;
51      double err_h = _c_hadrons->err()*fact;
52      Estimate1DPtr hadrons;
53      book(hadrons, 1, 1, 1);
54      for (auto& b : hadrons->bins()) {
55        if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
56          hadrons->bin(1).set(sig_h, err_h);
57        }
58      }
59    }
60
61    /// @}
62
63
64    /// @name Histograms
65    /// @{
66    CounterPtr _c_hadrons;
67    /// @}
68
69
70  };
71
72
73  RIVET_DECLARE_PLUGIN(CLEO_2006_I700665);
74
75
76}