Indico will be down tomorrow, Thu 15 Nov, from 7:20 CET (6:20 UTC), for a duration of 50 minutes. More details here
TH Exceptional Seminar

The Boltzmann Equation: Missing in Action

by Yuri Kovchegov (The Ohio State University)

Europe/Zurich
4-3-006 - TH Conference Room (CERN)

4-3-006 - TH Conference Room

CERN

100
Show room on map
Description

The Boltzmann equation is widely used to describe the dynamics of the medium produced in heavy ion collisions. However, the validity of such kinetic theory approach to heavy ion collisions has not been shown explicitly in the literature. In this talk I will describe an effort to correct this situation by testing the validity of the Boltzmann equation in heavy ion collisions. We consider a 2->2 parton re-scattering process happening after the partons have been produced in the initial collision. For this process, we compare the Boltzmann equation prediction to the (tour de force) exact diagrammatic calculation. We find a stark disagreement between the two: while the Boltzmann equation prediction exhibits first signs of medium isotropization, the exact diagrammatic calculation leads to anisotropic "medium" consistent with free streaming and showing no signs of isotropization. We thus see no evidence for the applicability of kinetic theory to heavy ion collisions.

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×