Rivet analyses

Charged particle multiplicity for energies between 2.6 and 7.8 GeV

Experiment: MARKI (SPEAR)

Inspire ID: 169326

Status: VALIDATED

Authors: - Peter Richardson

References: - Phys.Rev. D26 (1982) 969, 1982

Beams: e- e+

Beam energies: (1.3, 1.3); (1.4, 1.4); (1.5, 1.5); (1.6, 1.6); (1.6, 1.6); (1.6, 1.6); (1.7, 1.7); (1.7, 1.7); (1.8, 1.8); (1.8, 1.8); (1.8, 1.8); (1.8, 1.8); (1.9, 1.9); (1.9, 1.9); (1.9, 1.9); (1.9, 1.9); (2.0, 2.0); (2.0, 2.0); (2.0, 2.0); (2.0, 2.0); (2.1, 2.1); (2.1, 2.1); (2.1, 2.1); (2.1, 2.1); (2.2, 2.2); (2.2, 2.2); (2.2, 2.2); (2.2, 2.2); (2.3, 2.3); (2.3, 2.3); (2.3, 2.3); (2.4, 2.4); (2.4, 2.4); (2.5, 2.5); (2.5, 2.5); (2.6, 2.6); (2.6, 2.6); (2.7, 2.7); (2.8, 2.8); (2.8, 2.8); (2.9, 2.9); (2.9, 2.9); (2.9, 2.9); (2.9, 2.9); (3.0, 3.0); (3.0, 3.0); (3.0, 3.0); (3.0, 3.0); (3.0, 3.0); (3.1, 3.1); (3.1, 3.1); (3.1, 3.1); (3.1, 3.1); (3.2, 3.2); (3.2, 3.2); (3.2, 3.2); (3.2, 3.2); (3.3, 3.3); (3.3, 3.3); (3.3, 3.3); (3.4, 3.4); (3.4, 3.4); (3.4, 3.4); (3.4, 3.4); (3.5, 3.5); (3.5, 3.5); (3.5, 3.5); (3.5, 3.5); (3.5, 3.5); (3.6, 3.6); (3.6, 3.6); (3.6, 3.6); (3.6, 3.6); (3.7, 3.7); (3.7, 3.7); (3.7, 3.7); (3.8, 3.8); (3.9, 3.9)GeV

Run details: - e+e- to hadrons

Charged particle multiplicity for energies between 2.6 and 7.8 GeV.

Source code:MARKI_1982_I169326.cc

// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/ChargedFinalState.hh"

namespace Rivet {


  /// @brief Charged multiplicity
  class MARKI_1982_I169326 : public Analysis {
  public:

    /// Constructor
    RIVET_DEFAULT_ANALYSIS_CTOR(MARKI_1982_I169326);


    /// @name Analysis methods
    /// @{

    /// Book histograms and initialise projections before the run
    void init() {

      // Initialise and register projections
      declare(ChargedFinalState(), "FS");

      // Book histograms
      book(_nHadrons, 6, 1, 1);
      for (const string& en : _nHadrons.binning().edges<0>()) {
        const double eval = stod(en)*GeV;
        if (isCompatibleWithSqrtS(eval)) {
          _sqs = en; break;
        }
      }
      raiseBeamErrorIf(_sqs.empty());
    }


    /// Perform the per-event analysis
    void analyze(const Event& event) {
      _nHadrons->fill(_sqs, apply<ChargedFinalState>(event, "FS").particles().size());
    }


    /// Normalise histograms etc., after the run
    void finalize() {}
    /// @}


    /// @name Histograms
    /// @{
    BinnedProfilePtr<string> _nHadrons;
    string _sqs = "";
    /// @}


  };


  RIVET_DECLARE_PLUGIN(MARKI_1982_I169326);


}