Measurements of semi-inclusive γ+jet and hadron+jet distributions in heavy-ion collisions at √sNN = 200 GeV with STAR

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 √sNN = 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 pTʲet and large jet radius R. We report corrected distributions as a function of both pTʲet and recoil azimuthal deflection with respect to γ and π⁰ 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.