Factorization of jet cross sections in heavy-ion collisions

Understand

We propose a new phenomenological approach to establish QCD factorization of jet cross sections in the heavy-ion environment.

• Starting from a factorization formalism in proton-proton collisions, we introduce medium modified jet functions to capture the leading interaction of jets with the hot and dense QCD medium.
• A global analysis using a Monte Carlo sampling approach is performed in order to reliably determine the new jet functions from the nuclear modification factor of inclusive jets at the LHC.
• We find that gluon jets are significantly more suppressed due to the presence of the medium than quark jets.