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Nuclear Physics Seminars at BNL

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

by Yeonju Go (Brookhaven National Laboratory)


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

[2] ATLAS-CONF-2023-054