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## Rivet analyses reference

Inspire ID: 142874
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Phys.Lett. B88 (1979) 171-176, 1979
Beams: e- e+
Beam energies: (11.0, 11.0); (13.8, 13.8); (15.0, 15.0); (15.8, 15.8) GeV
Run details:
Charged hadrom multiplcity at a range of energies, use with care as its not clear if $K_S^0$ decays are included of not, within the systematic error of 1.5
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/ChargedFinalState.hh" namespace Rivet { /// @brief Add a short analysis description here class JADE_1979_I142874 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(JADE_1979_I142874); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { // Initialise and register projections declare(ChargedFinalState(), "FS"); // Book histograms book(_nHadrons, "TMP/hadrons"); } /// Perform the per-event analysis void analyze(const Event& event) { const ChargedFinalState& fs = apply(event, "FS"); _nHadrons->fill(fs.particles().size()); } /// Normalise histograms etc., after the run void finalize() { double sigma = _nHadrons->val()/sumOfWeights(); double error = _nHadrons->err()/sumOfWeights(); Scatter2D temphisto(refData(2, 1, 1)); Scatter2DPtr mult; book(mult, 2, 1, 1); for (size_t b = 0; b < temphisto.numPoints(); b++) { const double x = temphisto.point(b).x(); pair ex = temphisto.point(b).xErrs(); pair ex2 = ex; if(ex2.first ==0.) ex2. first=0.0001; if(ex2.second==0.) ex2.second=0.0001; if (inRange(sqrtS()/GeV, x-ex2.first, x+ex2.second)) { mult->addPoint(x, sigma, ex, make_pair(error,error)); } else { mult->addPoint(x, 0., ex, make_pair(0.,.0)); } } } //@} /// @name Histograms //@{ CounterPtr _nHadrons; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(JADE_1979_I142874); }