Year: 2026
Type: article
Abstract: A bstract We apply weakly coupled QCD kinetic theory to investigate the thermalization of high-momentum on-shell partons (minijets) in a Quark-Gluon Plasma (QGP). Our approach incorporates isotropic hard thermal loop screening to model soft quark and gluon exchanges, allowing us to verify consistency with established analytic results of jet transport coefficients. We perform kinetic simulations of minijets propagating through a thermal gluon plasma, incorporating both collinear radiation and elastic scatterings. The resulting evolution is compared to predictions from jet transport coefficients, including the longitudinal and transverse jet-quenching parameters $$ \hat{q} $$ q ̂ , energy loss, and the drag coefficient. We find that standard definitions of jet transport coefficients neglect the contributions from recoiling medium particles. Including these contributions restores consistency with the kinetic evolution. Finally, we show that the minijet thermalization time scales remarkably well with $$ \hat{q} $$ q ̂ and we produce a phenomenological estimate of the minijet quenching time in heavy-ion collisions.
Source: Journal of High Energy Physics
Institutions: Centre National de la Recherche Scientifique, TU Wien, Laboratoire de Physique Subatomique et des Technologies Associées, IMT Atlantique, Institut National de Physique Nucléaire et de Physique des Particules, Université de Nantes, Nantes Université, Massachusetts Institute of Technology, Heidelberg University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4415947100