ADD extra dimensional gravity and di-jet production at hadron colliders

We re-analyze dijet production at hadron colliders (the Tevatron at Fermilab and the Large Hadron Collider, LHC, at CERN), to determine the potential limits on Planck mass in ADD type extra dimensional gravity scenarios. We try a variety of experimental observables in order to maximize the exclusion limits; we find that the $p_{_T}$, $p_{_T}^2$ and $\tau$ distributions give the highest search limits, and these observables provide comparable reaches.