Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-09-29
Eur.Phys.J.C71:1512,2011
Physics
High Energy Physics
High Energy Physics - Experiment
53 pages plus author list (67 pages total), 26 figures, 22 tables. Typo in abstract corrected, document unchanged. Submitted t
Scientific paper
10.1140/epjc/s10052-010-1512-2
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using the ATLAS detector. 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 two jet resolution parameters, R = 0.4 and 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 the angular variable $\chi$. The results are compared to expectations based on next-to-leading-order QCD, which agree with the data, providing a validation of the theory in a new kinematic regime.
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