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## Rivet analyses reference

### HRS_1986_I18502

Charged Hadron multiplicity at 29 GeV
Experiment: HRS (PEP)
Inspire ID: 18502
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Phys.Rev. D34 (1986) 3304
Beams: e+ e-
Beam energies: (14.5, 14.5) GeV
Run details:
• Hadronic e+e- events at $\sqrt{s} = 29.$ GeV

The charged particle multiplicity distribution of hadronic $e^+e^-$ events, as measured at $\sqrt{s} = 29.$ GeV using the HRS detector at PEP.

Source code: HRS_1986_I18502.cc
 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 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/ChargedFinalState.hh" namespace Rivet { /// @brief Charged hadron multiplicity at 29 GeV from HRS experiment class HRS_1986_I18502 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(HRS_1986_I18502); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { const ChargedFinalState cfs; declare(cfs, "CFS"); _histChTot = bookHisto1D(1, 1, 1); _histAver = bookProfile1D(3, 1, 1); } /// Perform the per-event analysis void analyze(const Event& event) { const FinalState& cfs = apply(event, "CFS"); MSG_DEBUG("Total charged multiplicity = " << cfs.size()); _histChTot->fill(cfs.size(), event.weight()); _histAver->fill(_histAver->bin(0).xMid(),cfs.size(),event.weight()); } /// Normalise histograms etc., after the run void finalize() { scale(_histChTot, 200.0/sumOfWeights()); // bin width (2) and %age (100) } //@} private: /// @name Histograms //@{ Histo1DPtr _histChTot; Profile1DPtr _histAver; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(HRS_1986_I18502); }