Online Strangeness in Quark Matter Conference 2021

Building a testable shear viscosity across the QCD phase diagram

18 May 2021, 11:50

20m

Room C (Zoom)

Open and New (Correlations)

Speaker

Emma McLaughlin (Columbia University)

Description

Current experiments at the Relativistic Heavy Ion Collider (RHIC) are probing
finite baryon densities where the shear viscosity to enthalpy ratio $\eta T/w$
of the Quark Gluon Plasma remains unknown. We use the Hadron Resonance Gas
(HRG) model with the most up-to-date hadron list to calculate $\eta T/w$ at low
temperatures and at finite baryon densities ${\rho }_B$. We then match $\eta T/w$
to a QCD-based shear viscosity calculation within the deconfined phase to
create a table across $\{T,{\mu }_B\}$ for different cross-over and
critical point scenarios at a specified location [1]. We find that these new $\eta T/w(T,{\mu }_B)$ values would require initial conditions at significantly larger
${\rho }_B$, compared to ideal hydrodynamic trajectories, in order to reach the
same freeze-out point.
[1] E. McLaughlin, J. Rose, T. Dore, P. Parotto, C. Ratti, and J. Noronha-Hostler, arXiv:2103.02090

Presentation materials

Building a testable shear viscosity across the QCD phase diagram.pdf

Building a testable shear viscosity across the QCD phase diagram.pptx