Rivet analyses

Inclusive η production rate for energies between 3.99 and 5.01 GeV

Experiment: DASP (DORIS)

Inspire ID: 132410

Status: VALIDATED

Authors: - Peter Richardson

References: - Phys.Lett. B80 (1979) 412-418, 1979

Beams: e- e+

Beam energies: ANY

Run details: - e+e- to hadrons between 3.99 and 5.01 GeV

Measurement of the rate for inclusive η production rate for energies between 3.99 and 5.01 GeV by the DASP experiment.

Source code:DASP_1979_I132410.cc

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

namespace Rivet {


  /// @brief inclusive eta production
  class DASP_1979_I132410 : public Analysis {
  public:

    /// Constructor
    RIVET_DEFAULT_ANALYSIS_CTOR(DASP_1979_I132410);


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

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

      // Initialise and register projections
      declare(UnstableParticles(), "UFS");

      // Book histograms
      book(_c_eta, "/TMP/neta");

    }


    /// Perform the per-event analysis
    void analyze(const Event& event) {
      const UnstableParticles& ufs = apply<UnstableParticles>(event, "UFS");
      _c_eta->fill(ufs.particles(Cuts::pid==221).size());
    }


    /// Normalise histograms etc., after the run
    void finalize() {
      scale(_c_eta,1./sumOfWeights()*crossSection()/nanobarn);
      Estimate1DPtr mult;
      book(mult, 1, 1, 1);
      for (auto& b : mult->bins()) {
        if (inRange(sqrtS()/GeV, b.xMin(), b.xMax())) {
          b.set(_c_eta->val(), _c_eta->err());
        }
      }
    }

    /// @}


    /// @name Histograms
    /// @{
    CounterPtr _c_eta;
    /// @}


  };


  RIVET_DECLARE_PLUGIN(DASP_1979_I132410);


}