5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

Beam Energy and System Size Dependence of the Viscous Damping of Anisotropic Flow

Not scheduled
2h 30m
Hyatt Regency Chicago

Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: C08


Mr Niseem Abdelrahman"Magdy" (Stony Brook University)


We present recent STAR measurements of the anisotropic flow coefficients $v_n$ ($n = 1-6$) in Au+Au, Cu+Cu, Cu+Au collisions at $\sqrt{s_{NN}} = 200$~GeV and U+U collisions at $\sqrt{s_{NN}} = 193$~GeV and for Au+Au collisions spanning the full range of the first beam energy scan ($7 - 200$~GeV: BES-I). For a given beam energy, the differential $v_n$ measurements indicate acoustic scaling patterns which reflect the detailed dependence of $v_n$ on collision-system size, eccentricity ($\varepsilon_n$), temperature ($T$) and chemical potential ($\mu_{B}$). These measurements are important constraints for the $\sqrt{s_{NN}}$ dependence of the viscous coefficient which encode the $T$ and $\mu_{B}$ dependence of the specific shear viscosity $\eta/s$. The beam energy dependence of the viscous coefficient for a fixed centrality, shows a non-monotonic pattern which could be an indication for the onset of critical reaction dynamics in the BES-I energy range.

Collaboration STAR
Preferred Track Collective Dynamics

Primary author

Mr Niseem Abdelrahman"Magdy" (Stony Brook University)

Presentation materials