Observation of Energetic Jets in $pp$ Collisions at $\sqrt{s}$=7 TeV using the ATLAS Experiment at the LHC

We report the observation of energetic jet production in proton-proton collisions at $sqrt{s}=7$~TeV, based on about 1~nb${}^{-1}$ of integrated luminosity collected by the ATLAS detector. The ${anti}-k_T$ algorithm is used to reconstruct jets with $p_{ T}^{jet}>30$~GeV and $|y^{jet}|<2.8$. Jets with $p_{ T}^{jet}$ up to 500~GeV and events with dijet mass ${m}^{jj}$ up to 1~TeV are observed. The jet shapes and charged particle flow confirm that the observed jet signal corresponds to collimated flows of particles in the final state.