Rivet analyses

title: ATLAS_2016_CONF_2016_092

Inclusive jet cross sections using early 13 TeV data

Experiment: ATLAS (LHC)

Inspire ID: 1482689

Status: OBSOLETE

Authors: - Stefan von Buddenbrock

References: - Expt page: ATLAS-CONF-2016-092

Beams: p+ p+

Beam energies: (6500.0, 6500.0)GeV

Run details: - Soft and hard QCD events

This note presents the measurement of inclusive-jet cross-sections in proton--proton collisions at a centre-of-mass energy of 13TeV. The measurement uses data corresponding to an integrated luminosity of 3.2 fb$^{-1}$ collected with the ATLAS detector at the Large Hadron Collider in 2015. Jets are clustered using the anti-$k_\text{t}$ algorithm with a radius parameter value of $R = 0.4$. Double differential inclusive-jet cross-sections are presented as a function of the jet transverse momentum, covering the range from 100 GeV to about 3.2 TeV, and of the absolute jet rapidity, up to $|y| = 3$. The predictions of next-to-leading-order QCD calculations using several parton distribution function (PDF) sets and corrected for non-perturbative and electroweak effects are compared to the measured cross-sections. The predictions are consistent with the measured cross-sections within uncertainties.

Source code:ATLAS_2016_CONF_2016_092.cc

```c++ // -- C++ --

include "Rivet/Analysis.hh"

include "Rivet/Projections/FastJets.hh"

include "Rivet/Projections/FinalState.hh"

namespace Rivet {

/// Inclusive jet cross sections using early 13 TeV data /// @author Stefan von Buddenbrock stef.von.b@cern.ch class ATLAS_2016_CONF_2016_092 : public Analysis { public:

/// Constructor
RIVET_DEFAULT_ANALYSIS_CTOR(ATLAS_2016_CONF_2016_092);


/// Bookings
void init() {

  // Define the jets
  FastJets antiKT04Jets(FinalState(Cuts::open()), JetAlg::ANTIKT, 0.4);
  antiKT04Jets.useInvisibles();
  declare(antiKT04Jets, "antiKT04Jets");

  // Book histograms
  const vector<double> y_bins{0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0};
  book(_h_pT, y_bins);
  for (auto& b : _h_pT->bins()) {
    book(b, b.index(), 1, 1);
  }
}


/// Per-event analysis
void analyze(const Event& event) {
  const Jets& jets = apply<FastJets>(event, "antiKT04Jets")
                         .jetsByPt(Cuts::pT > 100 * GeV && Cuts::absrap < 3.0);
  for (const Jet& j : jets) {
    _h_pT->fill(j.absrap(), j.pT() / GeV);
  }
}


/// Post-run scaling
void finalize() {
  // Divide by 2 to only get positive rapidity values
  scale(_h_pT, 0.5 * crossSection() / picobarn / sumOfWeights());
  divByGroupWidth(_h_pT);
}


/// Histograms
Histo1DGroupPtr _h_pT;

};

RIVET_DECLARE_PLUGIN(ATLAS_2016_CONF_2016_092);

} ```