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SUMMARY:Jet Momentum Broadening in Viscous QCD Matter: A Moment Expansion 
 Approach
DTSTART:20260910T120000Z
DTEND:20260910T130000Z
DTSTAMP:20260902T105900Z
UID:indico-event-40577@indico.in2p3.fr
DESCRIPTION:Jets probe the quark–gluon plasma at its earliest\, most far
 -from-equilibrium stages\, when the medium is strongly flowing and highly 
 anisotropic. Medium-induced broadening is typically encoded in a single sc
 alar transport coefficient\, the jet quenching parameter $\\hat{q}$\, defi
 ned in the medium's local rest frame. This scalar description is tied to a
  specific rest frame and a single "transverse" plane\, missing the rich di
 rectional structure and flow-induced anisotropies that appear in broadenin
 g in realistic\, expanding QCD matter. We formulate out-of-equilibrium jet
  momentum broadening in QCD effective kinetic theory through a moment expa
 nsion of the medium distribution function\, a method traditionally used to
  derive relativistic viscous hydrodynamics from kinetic theory. We explici
 tly compute the leading near-equilibrium contribution to the spatial jet b
 roadening tensor $q^{ij}$ within the 14-moment approximation\, and show th
 at it is controlled by the medium shear-stress tensor. This provides a dir
 ect map from QCD effective kinetic theory to event-by-event viscous hydrod
 ynamic simulations\, converting local shear-stress fields into anisotropic
  corrections to jet broadening in heavy-ion collisions.\n\nhttps://indico.
 in2p3.fr/event/40577/
URL:https://indico.in2p3.fr/event/40577/
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