Radial distribution of charm quarks in jets in high-energy heavy-ion collisions

• Published in: Nuclear physics. A 2021-01, Vol.1005, p.121787, Article 121787
• Main Authors: Wang, Sa, Dai, Wei, Yan, Jun, Zhang, Ben-Wei, Wang, Enke
• Format: Article
• Language: English
• Subjects: diffusion of charm quark; heavy flavor; heavy-ion collisions; jet quenching; quark-gluon plasma
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2020.121787

Heavy flavor physics in high-energy heavy-ion collisions is a promising and active area to study the mass dependence of the “jet quenching” effects both at the RHIC and the LHC. In this talk, we present the first theoretical study on the D0 meson radial distributions relative to the jet axis both in p+p and Pb+Pb collisions at sNN=5.02TeV, where a nice agreement of our results with experimental data is observed. The in-medium parton propagations are described by a Monte Carlo transport model which uses the next-to-leading order (NLO) plus parton shower (PS) event generator SHERPA as input and includes elastic (collisional) and inelastic (radiative) in-medium interaction of heavy flavor jet. We find that, at low D0 meson pT, the radial distribution significantly shifts to larger radius indicating a strong diffusion effect, and the diffusion effects decrease quickly with pT, which is consistent with the recent CMS measurements. We demonstrate that the angular deviation of charm quarks is sensitive to Ds but not qˆ, which may provide new constrains on the collisional and radiative heavy quark energy loss.