Rivet analyses

Inclusive jet cross-section

Experiment: CDF (Tevatron Run 1)

Inspire ID: 552797

Status: VALIDATED

Authors: - Frank Siegert

References: - Phys.Rev.D64:032001,2001 - DOI: 10.1103/PhysRevD.64.032001 - arXiv: hep-ph/0102074

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 inclusive jet cross-section for jet transverse energies from 40 to 465~GeV in the pseudorapidity range 0.1 < |η| < 0.7. The results are based on 87 pb−1 of data.

Source code:CDF_2001_I552797.cc

// -*- C++ -*-
#include "Rivet/Analysis.hh"
#include "Rivet/Projections/FastJets.hh"
#include "Rivet/Projections/FinalState.hh"

namespace Rivet {


  /// @brief CDF Run I inclusive jet cross-section
  class CDF_2001_I552797 : public Analysis {
  public:

    RIVET_DEFAULT_ANALYSIS_CTOR(CDF_2001_I552797);


    /// @name Analysis methods
    /// @{

    /// Book histograms and initialise projections before the run
    void init() {
      FinalState fs(Cuts::abseta < 4.2);
      declare(FastJets(fs, JetAlg::CDFJETCLU, 0.7), "Jets");
      book(_h_ET, 1, 1, 1);
    }


    /// Perform the per-event analysis
    void analyze(const Event& event) {
      if (_edges.empty()) _edges = _h_ET->xEdges();
      Jets jets = apply<FastJets>(event, "Jets")
                      .jets(Cuts::Et > 40 * GeV && Cuts::abseta >= 0.1 && Cuts::abseta <= 0.7, cmpMomByEt);
      for (const Jet& jet : jets) {
        _h_ET->fill(map2string(jet.Et()));
      }
    }


    /// Normalise histograms etc., after the run
    void finalize() {
      const double deta = 1.2;
      scale(_h_ET, crossSection() / sumOfWeights() / deta / nanobarn);
      for (auto& b : _h_ET->bins()) {
        b.scaleW(1.0 / _axis.width(b.index()));
      }
    }

    string map2string(const double value) const {
      const size_t idx = _axis.index(value);
      if (idx && idx <= _edges.size()) return _edges[idx - 1];
      return "OTHER";
    }

    /// @}


  private:

    /// Histogram
    BinnedHistoPtr<string> _h_ET;
    vector<string> _edges;
    YODA::Axis<double> _axis{40.3,   46.3,   52.25,  58.1,   63.85, 69.5,   75.1,   80.7,  86.25,
                             91.75,  97.25,  102.75, 108.2,  113.6, 119.0,  124.4,  129.8, 135.2,
                             141.8,  151.05, 161.8,  172.55, 183.3, 194.1,  204.85, 217.8, 236.25,
                             257.95, 279.65, 301.3,  322.85, 347.9, 387.55, 438.25};
  };


  RIVET_DECLARE_ALIASED_PLUGIN(CDF_2001_I552797, CDF_2001_S4563131);

}

Aliases: - CDF_2001_S4563131