Jet Production Cross Section Measurement With ATLAS

The inclusive single jet and di-jet cross sections were measured for proton - proton collisions at the Large Hadron Collider (LHC), using the ATLAS detector. The initial measurement used a total integrated luminosity of $17 nb^{−1}$ of data collected at a centre-of-mass energy of 7 TeV. Jets are reconstructed using the anti-kt algorithm with the two jet resolution parameters 0.4 and 0.6. A jet energy scale correction is then applied to these jets. The uncertainty on this correction dominates the total uncertainty on the measurement, and is calculated to be 7% for central jets above 60 GeV. The final cross sections agree with the predictions of next to leading order perturbative QCD, providing comparisons with theory for a previously unmeasured energy regime.