A search for jet medium response in heavy-ion collisions reveals new insights into quark-gluon plasma interaction dynamics.
A search for the quark-gluon plasma medium response to jet energy loss, via modifications of hadron distributions opposite to jets in photon-jet events measured with the ATLAS detector in Pb+Pb collisions, is presented. Photon-jet events provide a particularly clean probe of the quark-gluon plasma medium response, since the photon does not interact with the quark-gluon plasma and therefore defines the initial parton kinematics. Results are shown differentially in the momentum balance variable, xJγ = pTJet/pTγ, and compared to theoretical expectations from the CoLBT model.
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Soumya Mohapatra (2026) studied this question.
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