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Rivet analyses reference

PLUTO_1977_I118873

$K^0$ spectra at $3.63$, $4.03$ and $4.5$ GeV
Experiment: PLUTO (DORIS)
Inspire ID: 118873
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Phys.Lett. B104 (1981) 79-83, 1981
Beams: e- e+
Beam energies: (1.8, 1.8); (2.0, 2.0); (2.2, 2.2) GeV
Run details:
• e+ e- to hadrons and e+ e- to mu+ mu- (for normalization)

The spectra for $K^0$ production at $3.63$, $4.03$ and $4.5$ GeV measured by the PLUTO experiment. The energy dependent cross section is not included as it is implemented in PLUTO_1981_I165122.

Source code: PLUTO_1977_I118873.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 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/Beam.hh" #include "Rivet/Projections/UnstableParticles.hh" namespace Rivet { /// @brief Kaon spectra at 3.63, 4.03 and 4.5 GeV class PLUTO_1977_I118873 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(PLUTO_1977_I118873); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { declare(Beam(), "Beams"); declare(UnstableParticles(), "UFS"); if (fuzzyEquals(sqrtS()/GeV, 3.63, 1E-3)) { book(_h_spectrum, 2, 1, 1); } else if (fuzzyEquals(sqrtS()/GeV, 4.03, 1E-3)) { book(_h_spectrum, 3, 1, 1); } else if (fuzzyEquals(sqrtS()/GeV, 4.5, 1E-3)) { book(_h_spectrum, 4, 1, 1); } else MSG_ERROR("Beam energy not supported!"); } /// Perform the per-event analysis void analyze(const Event& event) { // Get beams and average beam momentum const ParticlePair& beams = apply(event, "Beams").beams(); const double meanBeamMom = ( beams.first.p3().mod() + beams.second.p3().mod() ) / 2.0; MSG_DEBUG("Avg beam momentum = " << meanBeamMom); // unstable particles for (const Particle& p : apply(event, "UFS"). particles(Cuts::pid==PID::K0S)) { double xp = p.E()/meanBeamMom; double beta = p.p3().mod()/p.E(); _h_spectrum->fill(xp,1./beta); } } /// Normalise histograms etc., after the run void finalize() { scale(_h_spectrum, sqr(sqrtS())*crossSection()/nanobarn/sumOfWeights()); } //@} /// @name Histograms //@{ Histo1DPtr _h_spectrum; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(PLUTO_1977_I118873); }