Speaker
Description
Quarks and gluons traversing a QCD medium may lose energy through a variety of processes, including medium-induced radiation sensitive to their QCD color factor.
The color-charge dependence of the parton-medium interaction is a critical component in all jet energy loss models and generally in heavy-ion physics phenomenology. In this talk, the color charge dependence of jet-medium interactions is quantitatively studied
with a new measurement that compares the nuclear modification factor for photon-tagged jets to that for inclusive jets. These measurements exploit the known difference in the fraction of quark-/gluon-initiated jets with and without the photon tag, allowing for a precise extraction of the color-charge sensitivity. Additionally, the possible impact of the color charge factor on
jet-medium interactions is studied in photon-tagged multi-jet systems where the most likely configuration of jets is one quark and one gluon initiated. Comparisons with state-of-the-art theoretical models are shown.
