Jet production cross section and jet properties in pp collisions at 7 TeV centre-of-mass energy with the ATLAS detector

TL;DR

This paper reports the first measurement of jet production cross sections in proton-proton collisions at 7 TeV using the ATLAS detector, providing data to test QCD predictions at high energies.

Contribution

It presents the first measurement of jet cross sections at 7 TeV with detailed analysis and comparison to NLO QCD expectations, using the anti-kt algorithm and a new dataset.

Findings

Jet energy scale uncertainty is within 7% for jets above 60 GeV.

Measured cross sections agree with next-to-leading order QCD predictions.

Provides baseline data for future high-energy jet studies.

Abstract

Jet cross sections have been measured with the ATLAS detector for the first time in proton-proton collisions at center-of-mass energy of t TeV. The measurement uses an integrated luminosity of 17 nb-1 recorded at the Large Hadron Collider. The anti-kt algorithm is used to identify jets, with jet resolution parameters R=0.6. The dominant uncertainty comes from the jet energy scale, which is determined to within 7% for central jets above 60 GeV transverse momentum. Inclusive single-jet differential cross sections are presented as functions of jet transverse momentum and rapidity. Dijet cross sections are presented as functions of dijet mass and angle chi. The experimental results are compared to the expectations based on next-to-leading order QCD.