A global analysis of Heavy Ion Collisions with transverse momentum dependence

by Wilke Van Der Schee (MIT)

Friday 13 Nov 2020, 16:00 → 17:00 Europe/Zurich

Zoom only (CERN)

The understanding of heavy ion collisions and its quark-gluon plasma (QGP) formation requires a complicated interplay of rich physics in a wealth of experimental data. In this talk I will show how for identified particles as a function of transverse momentum both the spectra as well as the anisotropic flow coefficients for both PbPb and $p$Pb collisions can be compared in a global analysis of QGP evolution. We do this in a model including a free streaming prehydrodynamic phase with variable velocity $v_\text{fs}$, thereby widening the scope of initial conditions. During the hydrodynamic phase we vary three new second order transport coefficients. This leads to the most precise estimates for the temperature-dependent shear and bulk viscosity to date, whereby interestingly the bulk viscosity is consistent with zero. I will end with several model results at the optimal parameter values.

Refs.:

1. Nijs, van der Schee, Gürsoy, Snellings,  2010.15134
2. Nijs, van der Schee, Gürsoy, Snellings,  2010.15130

Zoom link

talk_CERNbayesianfinal.pdf