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## Rivet analyses reference

### CDF_2001_S4517016

Two jet triply-differential cross-section
Experiment: CDF (Tevatron Run 1)
Inspire ID: 538041
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

A measurement of the two-jet differential cross section, $\mathrm{d}^3\sigma/\mathrm{d}E_T \, \mathrm{d}\eta_1 \, \mathrm{d}\eta_2$, based on an integrated luminosity of $86 \mathrm{pb}^{-1}$. The differential cross section is measured as a function of the transverse energy, $E_\perp$, of a jet in the pseudorapidity region $0.1 < |\eta_1| < 0.7$ for four different pseudorapidity bins of a second jet restricted to $0.1 < |\eta_2| < 3.0$.

Source code: CDF_2001_S4517016.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 // -*- C++ -*- #include "Rivet/Analysis.hh" #include "Rivet/Tools/BinnedHistogram.hh" #include "Rivet/Projections/FinalState.hh" #include "Rivet/Projections/FastJets.hh" namespace Rivet { /// @brief CDF two-jet triply-differential cross-section class CDF_2001_S4517016 : public Analysis { public: /// @name Constructors etc. //@{ /// Constructor CDF_2001_S4517016() : Analysis("CDF_2001_S4517016") { } //@} public: /// @name Analysis methods //@{ /// Book histograms and initialise projections before the run void init() { FinalState fs(-4.2, 4.2); declare(FastJets(fs, FastJets::CDFJETCLU, 0.7), "Jets"); _h_ET.addHistogram(0.1, 0.7, bookHisto1D(1, 1, 1)); _h_ET.addHistogram(0.7, 1.4, bookHisto1D(2, 1, 1)); _h_ET.addHistogram(1.4, 2.1, bookHisto1D(3, 1, 1)); _h_ET.addHistogram(2.1, 3.0, bookHisto1D(4, 1, 1)); } /// Perform the per-event analysis void analyze(const Event& event) { const double weight = event.weight(); Jets jets = apply(event, "Jets").jets(Cuts::Et > 10*GeV, cmpMomByEt); if (jets.size() < 2) vetoEvent; FourMomentum jet1 = jets[0].momentum(); FourMomentum jet2 = jets[1].momentum(); double eta1 = jet1.abseta(); double eta2 = jet2.abseta(); double ET1 = jet1.Et(); double ET2 = jet2.Et(); if (!inRange(eta1, 0.1, 0.7) || ET1 < 40.0*GeV) vetoEvent; if (!inRange(eta2, 0.1, 3.0)) vetoEvent; _h_ET.fill(eta2, ET1, weight); if (eta2<0.7 && ET2>40.0*GeV) _h_ET.fill(eta1, ET2, weight); } /// Normalise histograms etc., after the run void finalize() { const double deta1 = 1.2; _h_ET.scale(crossSection()/nanobarn/sumOfWeights()/deta1 / 2.0, this); } //@} private: /// @name Histograms //@{ BinnedHistogram _h_ET; //@} }; // The hook for the plugin system DECLARE_RIVET_PLUGIN(CDF_2001_S4517016); }