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Isolated photon-jet correlations in Pb+Pb collisions at the LHC

ORAL

Abstract

Jets recoiling from isolated photons are a promising channel to study jet quenching in heavy-ion collisions, as photons do not interact strongly and therefore constrain the $Q^2$ of the initial hard scattering. We present isolated photon-jet correlations measured in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV by the ALICE collaboration. We study correlations of isolated photons above 20 GeV/$c$ with charged-particle jets above 10 GeV/$c$, reconstructed with the anti-kT algorithm with R=0.2. The correlations probe the lowest $p_\mathrm{T}$ range for photon-jet correlations measured so far at LHC energies. As the energy loss is expected to weakly depend on the parton energy, larger relative modifications due to the QGP are expected in the lower $p_\mathrm{T}$ regime.

Presenters

  • Barbara V Jacak

    University of California, Berkeley

Authors

  • Barbara V Jacak

    University of California, Berkeley

  • Alwina Liu

    University of California, Berkeley