Dilepton-Tagged Q-Qbar+Jet Events at the LHC

We propose a new method for identifying and isolating Q(bar Q)+jet events through semileptonic decays of the Q(bar Q) pair. Employing these decay dileptons to tag the jet in a specific kinematic region provides a clean signature of jets associated with heavy quark production. The measurement, in both pp and heavy-ion collisions, is essential for addressing heavy quark fragmentation in the vacuum and in a dense medium. We present next-to-leading order calculations of Q(bar Q) production (leading order in Q(bar Q)+jet production) in √s = 14 TeV pp collisions at the LHC and discuss the feasibility of the measurement in heavy-ion collisions at √sNN = 5.5 TeV