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## Rivet analyses reference

### CDF_2000_S4266730

Inclusive jet cross section differential in dijet mass
Experiment: CDF (Tevatron Run 1)
Inspire ID: 511377
Status: VALIDATED
Authors:
• Frank Siegert
References:
Beams: p- p+
Beam energies: (900.0, 900.0) GeV
Run details:
• Dijet events at Tevatron with $\sqrt{s}=1.8$ TeV

Measurement of the cross section for production of two or more jets as a function of dijet mass in the range 180 to 1000 GeV. It is based on an integrated luminosity of $86 \mathrm{pb}^{-1}$.

Source code: CDF_2000_S4266730.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 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Projections/FinalState.hh" #include "Rivet/Projections/FastJets.hh" namespace Rivet { /// @brief CDF dijet cross-section, differential in dijet mass class CDF_2000_S4266730 : public Analysis { public: /// @name Constructors etc. //@{ /// Constructor CDF_2000_S4266730() : Analysis("CDF_2000_S4266730") { } //@} public: /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { FinalState fs((Cuts::etaIn(-4.2, 4.2))); declare(FastJets(fs, FastJets::CDFJETCLU, 0.7), "Jets"); book(_h_mjj ,1, 1, 1); } /// Perform the per-event analysis void analyze(const Event& event) { Jets jets = apply(event, "Jets").jets(cmpMomByEt); if (jets.size() < 2) vetoEvent; FourMomentum jet1 = jets[0].momentum(); FourMomentum jet2 = jets[1].momentum(); double eta1 = jet1.eta(); double eta2 = jet2.eta(); if (fabs(eta1) > 2.0 || fabs(eta2) > 2.0) vetoEvent; if (fabs(tanh((eta1-eta2)/2)) > 2.0/3.0) vetoEvent; double mjj = FourMomentum(jet1+jet2).mass()/GeV; if (mjj < 180) vetoEvent; _h_mjj->fill(mjj); } /// Normalise histograms etc., after the run void finalize() { scale(_h_mjj, crossSection()/picobarn/sumOfWeights()); } //@} private: /// Histogram Histo1DPtr _h_mjj; }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(CDF_2000_S4266730); }