Jet quenching and acoplanarity via hadron-jet measurements in pp and Pb--Pb collisions at 5.02 TeV with ALICE

Abstract

Measurements of the semi-inclusive distribution of charged jets recoiling from a trigger hadron in pp and Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV are presented. This technique provides precise, data-driven subtraction of the large uncorrelated background in jet measurements. It uniquely enables the exploration of medium-induced modification of jet production and acoplanarity over wide phase space, including low transverse momentum ($p_{\mathrm{T}}$) and large resolution parameter ($R$) jets. This proceeding reports the measurements of medium-induced jet energy redistribution through the comparison of trigger-normalized recoil jet yields in pp and Pb--Pb collisions, and for jets with different $R$.

Proceedings of XXVIIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (QM2019), Wuhan, November 4-9