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# Initial Stages 2021

Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

## A global analysis of Heavy Ion Collisions with transverse momentum dependence

Jan 12, 2021, 6:20 PM
20m
Andrea’s room 1 (vDLCC)

### Andrea’s room 1

#### vDLCC

oral Collective dynamics from small to large systems

### Speaker

Wilke Van Der Schee (MIT)

### Description

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. Part of our testing includes an elaborate closure test. Interestingly, we find that our large model containing 21 parameters and also utilising this wide range of experimental data leads to a bulk viscosity that is consistent with zero. We conclude with the most precise estimates for the temperature-dependent shear and bulk viscosity to-date.

### Primary authors

Wilke Van Der Schee (MIT) Govert Nijs (Massachusetts Institute of Technology) Raimond Snellings (Nikhef National institute for subatomic physics (NL)) Umut Gursoy (Utrecht University)

### Presentation materials

 Recording talk_IS21final.pdf