Update of the search for new particles decaying into dijets in proton-proton collisions at $\sqrt{s} = 7 TeV$ with the ATLAS detector

We present an update of the results presented in [1], using 3.12 pb−1. In this update the analysis underwent only minor modifications due to changes in the trigger menu. No resonances were found in the updated sample. We improved the limits set on the product of cross section and signal acceptance for excited-quark (q*) production as a function of q* mass. These exclude at the 95% CL the q* mass interval 0.50 < mq* < 1.53 TeV