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CDF_2008_S7828950

CDF Run II inclusive jet cross-section using the Midpoint algorithm
Experiment: CDF (Tevatron Run 2)
Inspire ID: 790693
Status: VALIDATED
Authors:
  • Craig Group
  • Frank Siegert
References: Beams: p- p+
Beam energies: (980.0, 980.0) GeV
Run details:
  • Requires $2\rightarrow{2}$ QCD scattering processes. The minimum jet $E_\perp$ is 62 GeV, so a cut on kinematic pTmin may be required for good statistics.

Measurement of the inclusive jet cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV as a function of jet $E_\perp$, for $E_\perp >$ 62 GeV. The data is collected by the CDF II detector and has an integrated luminosity of 1.13 fb$^{-1}$. The measurement was made using the cone-based Midpoint jet clustering algorithm in rapidity bins within $|y|<2.1$. This measurement can be used to provide increased precision in PDFs at high parton momentum fraction $x$.

Source code: CDF_2008_S7828950.cc
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// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Tools/BinnedHistogram.hh"
#include "Rivet/Projections/FastJets.hh"

namespace Rivet {


  /// @brief CDF Run II inclusive jet cross-section using the Midpoint algorithm.
  ///
  /// The analysis includes 1.1fb^-1 of CDF data and is the first with a
  /// cone algorithm to include the forward region of the detector.
  /// arXiv:0807.2204 to be published in PRD
  class CDF_2008_S7828950 : public Analysis {
  public:

    /// Constructor
    CDF_2008_S7828950()
      : Analysis("CDF_2008_S7828950")
    {    }


    /// @name Analysis methods
    //@{

    // Book histos and set counters for number of events passed in each one
    void init() {
      const FinalState fs;
      declare(FastJets(fs, FastJets::CDFMIDPOINT, 0.7), "JetsM07");

      _binnedHistosR07.addHistogram(  0, 0.1, bookHisto1D(1, 1, 1));
      _binnedHistosR07.addHistogram(0.1, 0.7, bookHisto1D(2, 1, 1));
      _binnedHistosR07.addHistogram(0.7, 1.1, bookHisto1D(3, 1, 1));
      _binnedHistosR07.addHistogram(1.1, 1.6, bookHisto1D(4, 1, 1));
      _binnedHistosR07.addHistogram(1.6, 2.1, bookHisto1D(5, 1, 1));

    }


    // Do the analysis
    void analyze(const Event& event) {
      foreach (const Jet& jet, apply<FastJets>(event, "JetsM07").jets(Cuts::pT > 62*GeV)) {
        _binnedHistosR07.fill(jet.absrap(), jet.pT(), event.weight());
      }
    }


    // Normalise histograms to cross-section
    void finalize() {
      _binnedHistosR07.scale(crossSection()/nanobarn/sumOfWeights()/2.0, this);
    }

    //@}


  private:

    /// Histograms in different eta regions
    BinnedHistogram<double> _binnedHistosR07;

  };



  // The hook for the plugin system
  DECLARE_RIVET_PLUGIN(CDF_2008_S7828950);

}