Measurement of high mass dijet production in $pp$ collisions at $sqrt{s}=7$~TeV using the ATLAS detector

Dijet cross section measurements are presented as functions of the dijet invariant mass, $m_{12}$, and half the absolute rapidity difference of the two leading jets, $y^*$. This measurement uses the full sample of proton-proton collision data recorded using the ATLAS detector in 2011, which corresponds to an integrated luminosity of $(4.8 \pm 0.2)$~fb$^{-1}$. Jets are identified using the anti-$k_t$ algorithm with two different jet size parameters, $R= 0.4$ and $R = 0.6$. The measurements cover dijet invariant masses from 260 GeV to 4.6 TeV in the range $y^{*}<2.5$. The dominant uncertainty on these measurements comes from the jet energy scale. The cross sections are corrected for detector effects and compared to expectations based on next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, as well as next-to-leading order Monte Carlo predictions. Good agreement between data and theory predictions is found.