May 17 – 22, 2021
US/Eastern timezone

Building a testable shear viscosity across the QCD phase diagram

May 18, 2021, 11:50 AM
Room C (Zoom)

Room C


zoom co-host: Zhongling Ji


Emma McLaughlin (Columbia University)


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 $\left\{T,\mu_B\right\}$ 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

Primary author

Emma McLaughlin (Columbia University)


Travis Dore (University of Illinois at Urbana-Champaign) Prof. Jacquelyn Noronha-Hostler (University of Illinois Urbana Champaign) Claudia Ratti (University of Houston) Paolo Parotto (University of Wuppertal) Jacob Rose (Dr. Karl-Remeis Observatory - Astronomical Institute)

Presentation materials