rivet is hosted by Hepforge, IPPP Durham

## Rivet analyses reference

### OPAL_2008_I754316

Jet production in Photon-Photon collisions at $E_{\text{CMS}}=206$ GeV
Experiment: OPAL (LEP)
Inspire ID: 754316
Status: VALIDATED
Authors:
• Peter Richardson
References:
• Phys.Lett. B658 (2008) 185-192, 2008
Beams: e+ e-
Beam energies: ANY
Run details:
• e+ e- > gamma gamma events, needs direct, resolved and double resolved.

Jet production in $\gamma\gamma$ collisons where the photons are radiation from incoming electrons and positrons

Source code: OPAL_2008_I754316.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 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/GammaGammaFinalState.hh" #include "Rivet/Projections/FastJets.hh" namespace Rivet { /// @brief Add a short analysis description here class OPAL_2008_I754316 : public Analysis { public: /// Constructor DEFAULT_RIVET_ANALYSIS_CTOR(OPAL_2008_I754316); /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { // get the hadronic final state const GammaGammaKinematics& gammakin = declare(GammaGammaKinematics(), "Kinematics"); const FinalState & fs = declare(GammaGammaFinalState(gammakin), "FS"); declare(FastJets(fs, FastJets::KT,1.),"Jets"); // Book histograms book(_h_y1,1, 1, 1); book(_h_y2,2, 1, 1); } /// Perform the per-event analysis void analyze(const Event& event) { Jets jets = apply(event, "Jets").jetsByPt(Cuts::pT > 5*GeV and Cuts::abseta < 1.5); if(jets.empty()) vetoEvent; for(const Jet & jet : jets) { _h_y2->fill(jet.pT()); if(abs(jet.eta())<1.0) _h_y1->fill(jet.pT()); } } /// Normalise histograms etc., after the run void finalize() { scale(_h_y1, crossSection()/picobarn/sumOfWeights()); scale(_h_y2, crossSection()/picobarn/sumOfWeights()); } //@} /// @name Histograms //@{ Histo1DPtr _h_y1, _h_y2; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(OPAL_2008_I754316); }