Measurement of inclusive jet and dijet cross-sections in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

TL;DR

This paper reports precise measurements of inclusive jet and dijet cross-sections at 13 TeV using the ATLAS detector, comparing results with advanced QCD calculations to test theoretical models of proton-proton collisions.

Contribution

First measurement of inclusive jet and dijet cross-sections at 13 TeV with detailed comparison to high-order QCD predictions.

Findings

Measured jet cross-sections agree with NLO and NNLO QCD calculations within uncertainties.

Extended the kinematic range of jet measurements up to 3.5 TeV for single jets and 9 TeV for dijets.

Provided data to improve understanding of proton structure and QCD at high energies.

Abstract

Inclusive jet and dijet cross-sections are measured in proton-proton collisions at a centre-of-mass energy of 13 TeV. The measurement uses a dataset with an integrated luminosity of 3.2 fb$^{-1}$ recorded in 2015 with the ATLAS detector at the Large Hadron Collider. Jets are identified using the anti-${k_t}$ algorithm with a radius parameter value of $R=0.4$. The inclusive jet cross-sections are measured double-differentially as a function of the jet transverse momentum, covering the range from 100 GeV to 3.5 TeV, and the absolute jet rapidity up to $|y|=3$. The double-differential dijet production cross-sections are presented as a function of the dijet mass, covering the range from 300 GeV to 9 TeV, and the half absolute rapidity separation between the two leading jets within $|y|<3$, $y*$, up to $y*=3$. Next-to-leading-order, and next-to-next-to-leading-order for the inclusive jet measurement, perturbative QCD calculations corrected for non-perturbative and electroweak effects are compared to the measured cross-sections.