PoS - Proceedings of Science
Volume 438 - 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions (HardProbes2023) - Jets and their modification in QCD matter
Measurements of semi-inclusive $\gamma$+jet and hadron+jet distributions in heavy-ion collisions at $\sqrt{s_\mathrm{NN}}$ = 200 GeV with STAR
Y. He*  on behalf of the STAR collaboration
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Published on: February 16, 2024
Abstract
The STAR collaboration presents measurements of the semi-inclusive distribution of charged-particle jets recoiling from photon and hadron triggers in $p$+$p$ and heavy-ion collisions at $\sqrt{s_\mathrm{NN}}$ = 200 GeV. The large uncorrelated background in heavy-ion collisions is removed using the event mixing technique, enabling systematically well-controlled measurements at very low jet transverse momentum $p_\mathrm{T}^\mathrm{jet}$ and large jet radius $R$. We report corrected distributions as a function of both $p_\mathrm{T}^\mathrm{jet}$ and recoil azimuthal deflection with respect to $\gamma$ and $\pi^{0}$ trigger axis for $R$ = 0.2 and 0.5 jets in $p$+$p$ and Au+Au collisions. These measurements probe the medium-induced jet yield suppression, intra-jet broadening, and jet acoplanarity as well as their dependence on the color charge in heavy-ion collisions. Jet yields in Ru+Ru and Zr+Zr collisions are also studied for the system size dependence of jet energy loss.
DOI: https://doi.org/10.22323/1.438.0174
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