Rapidity distribution of jet quenching: effects on global observables
  We discuss modification in the rapidity distribution of the transverse energy flow as a signal of medium-induced partonic energy loss in ultrarelativistic heavy ion collisions. A scan of the global energy flow and jet rates in the wide rapidity region might provide the important information about the pseudo-rapidity size of a dense medium created in heavy ion collisions at the LHC. 
I.P. Lokhtin, S.V. Shmatov and P.I. Zarubin