https://doi.org/10.1051/epjconf/202225912002
Recent J/ψ results in p+p and Au+Au collisions from STAR
1 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
2 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
* e-mail: skfwyl@mail.ustc.edu.cn
Published online: 1 February 2022
In these proceedings, we present the measurements of inclusive J/ψ production at mid-rapidity region (|y| < 1.0) in Au+Au collisions at √SNN = 54.4 GeV by the STAR experiment. The dependences of nuclear modification factor (RAA) on centrality and transverse momentum (pT) are presented and compared to model calculations. No significant energy dependence of RAA is found within uncertainties. We also report the distribution of z(J/<) = pTJ/</pTjet and the fraction of J/ψ produced within a charged jet at mid-pseudorapidity (|η| < 0.6) with kinematic cuts of pTjet > 10 GeV/c and pTJ/< > 5 GeV/c in p+p collisions at √S = 500 GeV. Comparisons to model calculations are presented and physics implications are discussed.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
