Chemical equilibration in hadronic collisions

by Aleksas Mazeliauskas (Universität Heidelberg)

Thursday 21 Feb 2019, 10:00 → 11:00 Europe/Zurich

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

We study chemical equilibration in out-of-equilibrium Quark-Gluon Plasma using the first principle method of QCD effective kinetic theory, accurate at weak coupling. In longitudinally expanding systems---relevant for relativistic nuclear collisions---we find that for realistic couplings chemical equilibration takes place after hydrodynamization, but well before local thermalization. We estimate that hadronic collisions with final state multiplicities dNch/dη≳10^2 live long enough to reach approximate chemical equilibrium, which is consistent with the saturation of strangeness enhancement observed in proton-proton, proton-nucleus and nucleus-nucleus collisions.

References: arXiv:1811.03040, arXiv:1811.03068

 

Aleksas_Mazeliauskas_CERN_2019_02_21.pdf