Search for new phenomena with mono-jet plus missing transverse energy signature in pp collisions at sqrt{s} = 7TeV with the ATLAS detector

A search for one energetic jet and high missing transverse energy - in the context of Large Extra Dimensions (LED) scenarios - is performed in proton-proton collisions at centre of mass energy of 7 TeV, with the ATLAS detector at the LHC (Large Hadron Collider). Three kinematic regions are explored in a model independent way, using the 2011 data corresponding to 1. fb^{-1}. No data excess beyond the Standard Model expectations is found, and lower limits are set on the scale of the ADD LED model, for various number of extra dimensions.