Rivet analyses referenceCLEO_1983_I188805Measurement of the hadronic cross section between9.46 and 10.355 GeVExperiment: CLEO (CESR) Inspire ID: 188805 Status: VALIDATED Authors:
Beam energies: ANY Run details:
Measurement of the hadronic cross section between 9.46 and 10.355 GeV Source code: CLEO_1983_I188805.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_1983_I188805 : public Analysis {
10 public:
11
12 /// Constructor
13 RIVET_DEFAULT_ANALYSIS_CTOR(CLEO_1983_I188805);
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 histograms
23 book(_c_hadrons, "/TMP/sigma_hadrons");
24 }
25
26
27 /// Perform the per-event analysis
28 void analyze(const Event& event) {
29 const FinalState& fs = apply<FinalState>(event, "FS");
30
31 map<long,int> nCount;
32 int ntotal(0);
33 for (const Particle& p : fs.particles()) {
34 nCount[p.pid()] += 1;
35 ++ntotal;
36 }
37 // mu+mu- + photons
38 if(nCount[-13]==1 and nCount[13]==1 &&
39 ntotal==2+nCount[22])
40 vetoEvent;
41 // everything else
42 else
43 _c_hadrons->fill();
44 }
45
46
47 /// Normalise histograms etc., after the run
48 void finalize() {
49 // R
50 double fact = crossSection()/ sumOfWeights() /nanobarn;
51 double sig_h = _c_hadrons->val()*fact;
52 double err_h = _c_hadrons->err()*fact;
53 Scatter2D temphisto(refData(1, 1, 1));
54 Scatter2DPtr hadrons;
55 book(hadrons, 1,1,1);
56 for (size_t b = 0; b < temphisto.numPoints(); b++) {
57 const double x = temphisto.point(b).x();
58 pair<double,double> ex = temphisto.point(b).xErrs();
59 pair<double,double> ex2 = ex;
60 if(ex2.first ==0.) ex2. first=0.0001;
61 if(ex2.second==0.) ex2.second=0.0001;
62 if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) {
63 hadrons->addPoint(x, sig_h, ex, make_pair(err_h,err_h));
64 }
65 else {
66 hadrons->addPoint(x, 0., ex, make_pair(0.,.0));
67 }
68 }
69 }
70
71 //@}
72
73
74 /// @name Histograms
75 //@{
76 CounterPtr _c_hadrons;
77 //@}
78
79
80 };
81
82
83 // The hook for the plugin system
84 RIVET_DECLARE_PLUGIN(CLEO_1983_I188805);
85
86
87}
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