Rivet analyses

Cross section for e+e− → KS0K±π∓ for energies from 1.4 to 2.1 GeV

Experiment: DM1 (DCI)

Inspire ID: 176801

Status: VALIDATED

Authors: - Peter Richardson

References: - Z.Phys. C52 (1991) 227-230, 1991

Beams: e+ e-

Beam energies: ANY

Run details: - e+e- to hadrons

Measurement of the cross section for e+e− → KS0K±π∓ for energies from 1.4 to 2.`x GeV.

Source code:DM1_1982_I176801.cc

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

namespace Rivet {


  /// @brief e+e- -> KS0 K+- pi-+
  class DM1_1982_I176801 : public Analysis {
  public:

    /// Constructor
    RIVET_DEFAULT_ANALYSIS_CTOR(DM1_1982_I176801);


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

    /// Book histograms and initialise projections before the run
    void init() {
      // Initialise and register projections
      declare(FinalState(), "FS");
      book(_nKKpi, "/TMP/nKKpi", refData(1, 1, 1));
    }


    /// Perform the per-event analysis
    void analyze(const Event& event) {
      const FinalState& fs = apply<FinalState>(event, "FS");

      map<long, int> nCount;
      int ntotal(0);
      for (const Particle& p : fs.particles()) {
        nCount[p.pid()] += 1;
        ++ntotal;
      }
      if (ntotal != 3) vetoEvent;
      if (nCount[310] == 1
          && ((nCount[211] == 1 && nCount[-321] == 1) || (nCount[-211] == 1 && nCount[321] == 1)))
        _nKKpi->fill(sqrtS() / MeV);
    }


    /// Normalise histograms etc., after the run
    void finalize() {
      scale(_nKKpi, crossSection() / sumOfWeights() / nanobarn);
      Estimate1DPtr mult;
      book(mult, 1, 1, 1);
      barchart(_nKKpi, mult);
    }

    /// @}


    /// @name Histograms
    /// @{
    Histo1DPtr _nKKpi;
    /// @}
  };


  RIVET_DECLARE_PLUGIN(DM1_1982_I176801);


}