Speaker
Description
The propagation of heavy quarks (HQs), charm and bottom, in the quark-gluon plasma (QGP) is described by means of a full Boltzmann transport approach. The non-perturbative dynamics and the interaction between HQs and the bulk is taken into account by means of a Quasi-Particle Model. Including the description of the intense electromagnetic and vortical fields, we discuss their impact on the directed flow of neutral D mesons at RHIC and LHC energy, clarifying the powerful role of this observable in giving information on the transport properties of the hot QCD matter generated in ultra-relativistic collisions. Indeed, the $v_1$ magnitude is associated with the HQ diffusion coefficient while the $v_1$ splitting is connected to the electric conductivity of the QGP medium.
We also show our results for the D-meson $R_{AA}$ and $v_n$ at RHIC and LHC energies within a coalescence plus fragmentation hadronization scheme and including event-by-event initial state fluctuations. We highlight the role of the latter on the development of $v_3(p_T)$ and $v_4(p_T)$. We discuss event-shape selected D-meson spectra and $v_n$ as well as correlations between different D-meson flow coefficients at LHC energies in different centrality classes. The centrality selection is performed according to the magnitude of the second-order harmonic reduced flow vector $q_2$. The extracted temperature dependence of the spatial diffusion coefficient $D_s$ is consistent with lattice QCD results within the systematic uncertainties. Furthermore, we present predictions for $R_{AA}$, $v_2$ and $v_3$ of B mesons and electrons from semi-leptonic B-meson decays at top LHC energies. We find a remarkable suppression al low $p_T$, leading to a determination of $D_s$ that is in agreement with the lattice QCD calculations.
[1] L. Oliva, S. Plumari and V. Greco, JHEP 05, 034 (2021).
[2] S. Plumari, G. Coci, V. Minissale, S.K. Das, Y. Sun and V. Greco, Phys. Lett. B 805, 135460 (2020).
[3] F. Scardina, S.K. Das, V. Minissale, S. Plumari and V. Greco, Phys.Rev. C 96, 044905 (2017).
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