Regular Article - Theoretical Physics
Probing the in-medium -broadening by +HF angular de-correlations
Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, 510006, Guangzhou, China
2 Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Southern Nuclear Science Computing Center, South China Normal University, 510006, Guangzhou, China
3 Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 430079, Wuhan, China
4 School of Mathematics and Physics, China University of Geosciences, 430074, Wuhan, China
Accepted: 1 July 2022
Published online: 25 July 2022
Angular correlations between vector boson and heavy flavors (HF) are potentially new effective tools to gain insight into the partonic interactions in the quark-gluon plasma (QGP). In this paper, we present the theoretical study of the azimuthal angular de-correlations of HF in nucleus-nucleus collisions as a new probe of the in-medium -broadening effect. The initial production of HF in p + p is generated by SHERPA which matches the next-to-leading hard processes with parton shower. The in-medium heavy quark evolution is implemented by a Monte Carlo Langevin simulation, which takes into account the collisional and radiative energy loss. We observe considerable suppression at and enhancement at in D azimuthal angular distribution in 0–10% Pb + Pb collisions at TeV compared to the p + p baseline, which indicates evident in-medium -broadening of charm quarks. We also find that the overall modification patterns of D angular distribution are sensitive to the selection cut of D meson . Furthermore, by constructing the 2D () correlation diagram, it’s possible to display the respective impact of the two aspects of jet quenching, energy loss and -broadening, on the final-state D observable simultaneously. Additionally, we find weaker angular de-correlations of B compared to D which may be helpful to understand the mass hierarchy in heavy-ion collisions. Finally, the nuclear modification of distributions in central 0–10% Au + Au collisions at RHIC energy is provided for completeness.
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