Probing Jet Energy Loss and Medium Modifications in Photon-Jet Events in Heavy Ion Collisions with ATLAS

by Yeonju Go (Brookhaven National Laboratory)

Tuesday Oct 10, 2023, 11:00 AM → 1:00 PM US/Eastern

Partons traversing the hot and dense medium of deconfined color charges produced in collisions of heavy nuclei are expected to lose their energy primarily through medium-induced gluon bremsstrahlung. As a result, the amount of induced energy loss is expected to depend on the QCD color charge carried by the parton, i.e. depend on whether it is a quark- or a gluon-initiated jet. In this seminar, photon+jet events taken with the ATLAS detector in Pb+Pb and pp collisions [1] will be present to constrain the color-charge dependence of jet energy loss. 

Furthermore, the presence of jets modifies the medium, leading to phenomena such as Mach Cones and diffusion wakes. The recent measurement of jet-hadron correlations in angular space in photon-jet events with ATLAS [2] will be discussed in the pursuit of identifying potential diffusion wake signatures.

[1] PLB 846 (2023) 138154 https://doi.org/10.1016/j.physletb.2023.138154

[2] ATLAS-CONF-2023-054 http://cds.cern.ch/record/2870221

2023Oct10_BNL_seminar_yeonju.pdf

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