Rivet analyses

title: 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

```c++ // -- 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
RIVET_DEFAULT_ANALYSIS_CTOR(HRS_1986_I18502);


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

/// Book histograms and initialise projections before the run
void init() {
  const ChargedFinalState cfs;
  declare(cfs, "CFS");

  book(_histChTot, 1, 1, 1);
  book(_histAver, 3, 1, 1);
}


/// Perform the per-event analysis
void analyze(const Event& event) {
  const FinalState& cfs = apply<FinalState>(event, "CFS");
  MSG_DEBUG("Total charged multiplicity = " << cfs.size());
  _histChTot->fill(cfs.size());
  _histAver->fill(29, cfs.size());
}


/// Normalise histograms etc., after the run
void finalize() {
  scale(_histChTot, 100.0 / sumOfWeights()); // and %age (100)
}

/// @}

private:

/// @name Histograms
/// @{
BinnedHistoPtr<int> _histChTot;
BinnedProfilePtr<int> _histAver;
/// @}

};

RIVET_DECLARE_PLUGIN(HRS_1986_I18502);

} ```