Jet Production in proton-proton collisions at oldmath sqrt (s)=7TeV with ATLAS

We report on the first measurements done with the ATLAS experiment of the characteristics of energetic jets produced in proton-proton collisions at the unprecedentedly reached center of mass energy of 7 TeV. Jets are reconstructed using the anti-kt clustering algorithm with distance parameter R=0.6. The kinematic region presented in this paper corresponds to jets with transverse momentum p_T>30 GeV and rapidity |y_jet|<2.8. In order to have a preliminary assessment of the jet production understanding, the data are compared to predictions based on leading-order QCD matrix elements plus parton shower Monte Carlo simulated events. The results shown are obtained on a data sample corresponding to about 1 nb**-1 of integrated luminosity delivered by the Large Hadron Collider.