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## Rivet analyses reference

### TASSO_1989_I279165

Jet masses in $e^+e^-$ between 14 and 44 GeV
Experiment: TASSO (Petra)
Inspire ID: 279165
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Z.Phys. C45 (1989) 11
Beams: e- e+
Beam energies: (7.0, 7.0); (11.0, 11.0); (17.4, 17.4); (21.8, 21.8) GeV
Run details:
• $e^+ e^- \to$ hadrons

Light, heavy jet masses and their difference at 14, 22, 34.8, and 43.5 measured by the TASSO experiment.

Source code: TASSO_1989_I279165.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 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/Beam.hh" #include "Rivet/Projections/Thrust.hh" #include "Rivet/Projections/Hemispheres.hh" #include "Rivet/Projections/ChargedFinalState.hh" namespace Rivet { /// @brief jet masses for 14, 22, 34.8 and 43,5 GeV class TASSO_1989_I279165 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(TASSO_1989_I279165); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { const ChargedFinalState cfs; declare(cfs, "CFS"); // Thrust const Thrust thrust(cfs); declare(thrust, "Thrust"); declare(Hemispheres(thrust), "Hemispheres"); int offset = 0; if (fuzzyEquals(sqrtS()/GeV,14.,1e-3 )) offset=1; else if(fuzzyEquals(sqrtS()/GeV, 22.0, 1e-2)) offset=2; else if(fuzzyEquals(sqrtS()/GeV,34.8,1e-3 )) offset=3; else if(fuzzyEquals(sqrtS()/GeV,43.5,1e-2)) offset=4; else MSG_ERROR("Beam energy " << sqrtS() << " not supported!"); // Book histograms book(_h_diff , 1, 1, offset); book(_h_heavy, 2, 1, offset); book(_h_light, 3, 1, offset); } /// Perform the per-event analysis void analyze(const Event& event) { const ChargedFinalState& cfs = apply(event, "CFS"); if (cfs.particles().size() < 3 ) vetoEvent; const Hemispheres& hemi = apply(event, "Hemispheres"); _h_heavy->fill(hemi.scaledM2high()); _h_light->fill(hemi.scaledM2low() ); _h_diff ->fill(hemi.scaledM2diff()); } /// Normalise histograms etc., after the run void finalize() { normalize(_h_diff ); normalize(_h_heavy); normalize(_h_light); } //@} /// @name Histograms //@{ Histo1DPtr _h_diff,_h_heavy,_h_light; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(TASSO_1989_I279165); }