arXiv:2510.19448·v1·High Energy Physics — Phenomenology
Probing the QGP through -differential radial flow of heavy quarks
Maria Lucia Sambataro (1 and 2)🇮🇹 · Salvatore Plumari (1 and 2)🇮🇹 · Santosh K. Das (3)🇮🇳 · Vincenzo Greco (1 and 2) ((1) Department of Physics and Astronomy, University of Catania, Catania, Italy (2) INFN-Laboratori Nazionali del Sud, Catania, Italy, (3) School of Physical Sciences, Indian Institute of Technology Goa, Goa, India)🇮🇹
Abstract
We introduce the -differential radial flow in the heavy-quark sector. Within an event-by-event Langevin framework, we show that this observable exhibits a strong sensitivity to the heavy quark-bulk interaction. It provides a powerful and novel tool to constrain the transport coefficients of heavy quarks in the QGP and, more generally, to assess the strength of the interaction of a Brownian particle in an expanding bulk medium. The results further indicate that heavy quarks exhibit collective behavior driven by the isotropic expansion of the QGP in heavy-ion collisions and, at low , it offers a marked signature of the heavy quark hadronization mechanism.
Comments: 6 pages and 4 figures