Measurements of charm quark interaction with the QGP in heavy-ion collisions at STAR

¹ State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
² Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

^* e-mail: suyuann@mail.ustc.edu.cn

Published online: 26 June 2024

Abstract

We report the measurements of D⁰ transverse momentum (p_T) differential invariant spectra with p_T < 8 GeV/c for 0–10%, 10–40%, and 40–80% centrality classes in isobar collisions (⁹⁶Ru + ⁹⁶Ru and ⁹⁶Zr + ⁹⁶Zr) at √S_NN = 200 GeV with the STAR experiment. The strong suppression of D⁰ yield is observed for p_T > 3 GeV/c in the central collisions, demonstrating that charm quarks suffer significant energy loss in the bulk QCD medium. In this proceeding, the measurements of D⁰ meson tagged jets at √S_NN = 200 GeV in Au+Au collisions are reported as well. We present the nuclear modification factor, R_CP, as a function of p_T,Jet and z_Jet, and show the ratios of the D⁰ radial profile with 1<p_T,D⁰ < 10 GeV/c. Comparisons to model calculations for D⁰ and D⁰-tagged jets are also discussed.