Measurement of the inclusive jet cross-section in proton-proton collisions at $\sqrt{s}=7$ TeV using 4.5 fb$^{-1}$ of data with the ATLAS detector

TL;DR

This paper reports a precise measurement of the inclusive jet cross-section in proton-proton collisions at 7 TeV using the ATLAS detector, comparing results with advanced QCD calculations and simulations to test theoretical models.

Contribution

First measurement of inclusive jet cross-sections at 7 TeV with detailed comparison to NLO QCD and Monte Carlo predictions.

Findings

Measured cross-sections agree with QCD predictions within uncertainties

Provided constraints on parton distribution functions

Extended the kinematic range of jet measurements

Abstract

The inclusive jet cross-section is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV using a data set corresponding to an integrated luminosity of 4.5 fb$^{-1}$ collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-$k_t$ algorithm with radius parameter values of 0.4 and 0.6. The double-differential cross-sections are presented as a function of the jet transverse momentum and the jet rapidity, covering jet transverse momenta from 100 GeV to 2 TeV. Next-to-leading-order QCD calculations corrected for non-perturbative effects and electroweak effects, as well as Monte Carlo simulations with next-to-leading-order matrix elements interfaced to parton showering, are compared to the measured cross-sections. A quantitative comparison of the measured cross-sections to the QCD calculations using several sets of parton distribution functions is performed.