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## Rivet analyses reference

### DASP_1979_I132045

$\pi^\pm$, $p,\bar{p}$, and $K^\pm$ spectra for $E_{\text{CMS}}=3.67\to5.2$ GeV in $e^+e^-$ collisions
Experiment: DASP (Doris)
Inspire ID: 132045
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Nucl.Phys. B148 (1979) 189-227
Beams: e- e+
Beam energies: ANY
Run details:
• e+e- to hadrons between 3.6 and 5.2 GeV

Measurement of the pion, proton and kaon spectra in $e^+e^-$ collisions for a range of energies between 3.6 and 5.2 GeV

Source code: DASP_1979_I132045.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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/Beam.hh" #include "Rivet/Projections/FinalState.hh" namespace Rivet { /// @brief Add a short analysis description here class DASP_1979_I132045 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(DASP_1979_I132045); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { // Initialise and register projections declare(FinalState(), "FS"); // find the hists based on beam energies int ihist=-1; if (inRange(sqrtS()/GeV,3.6,3.67)) { ihist=0; } else if (inRange(sqrtS()/GeV,3.98,4.1)) { ihist=1; } else if (inRange(sqrtS()/GeV,4.1,4.24)) { ihist=2; } else if (inRange(sqrtS()/GeV,4.24,4.36)) { ihist=3; } else if (inRange(sqrtS()/GeV,4.36,4.46)) { ihist=4; } else if (inRange(sqrtS()/GeV,4.46,4.98)) { ihist=5; } else if (fuzzyEquals(sqrtS(), 5.0, 1E-3)) { ihist=6; } else if (fuzzyEquals(sqrtS(), 5.2, 1E-3)) { ihist=7; } else { MSG_ERROR("Beam energy not supported!"); } // Book histograms book(_h_pi_p , 1,1,1+ihist); book(_h_K_p , 2+ihist,1,1); book(_h_proton_p, 10+ihist,1,1); book(_h_pi_x , 18,1,1+ihist); book(_h_K_x , 19+ihist,1,1); book(_h_proton_x, 27+ihist,1,1); } /// Perform the per-event analysis void analyze(const Event& event) { for (const Particle& p : apply(event, "FS").particles()) { const int id = p.abspid(); const double modp = p.p3().mod(); const double xp = 2.*modp/sqrtS(); const double beta = modp / p.E(); if(id==211) { _h_pi_p->fill(modp); _h_pi_x->fill(xp ,1./beta); } else if(id==321) { _h_K_p->fill(modp); _h_K_x->fill(xp ,1./beta); } else if(id==2212) { _h_proton_p->fill(modp); _h_proton_x->fill(xp ,1./beta); } } } /// Normalise histograms etc., after the run void finalize() { double fact = crossSection()/nanobarn/sumOfWeights(); scale(_h_pi_p ,fact); scale(_h_K_p ,fact); scale(_h_proton_p ,fact); fact *= sqr(sqrtS()); scale(_h_pi_x ,fact); scale(_h_K_x ,fact); scale(_h_proton_x ,fact); } //@} /// @name Histograms //@{ Histo1DPtr _h_pi_p, _h_K_p, _h_proton_p; Histo1DPtr _h_pi_x, _h_K_x, _h_proton_x; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(DASP_1979_I132045); }