The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Do Anisotropy Scaling Functions constrain the initial-state eccentricity spectrum, deformation of atomic nuclei, and the final-state specific shear viscosity?

Not scheduled

20m

Copenhagen

Poster Collective dynamics from small to large systems

Speaker

Roy Lacey

Description

There is substantial current interest in developing solid constraints on the initial-state eccentricity and the final-state viscous attenuation in heavy-ion collisions at RHIC and LHC energies. Such constraints are essential for the precision extraction of the temperature ($T$) and baryon chemical potential ($\mu_B$) dependence of the quark-gluon plasma’s transport coefficients and studies of the deformed shape of atomic nuclei. Recently, we developed Anisotropy Scaling Functions (ASF) for $v_n$ that leverage the combined response to initial-state eccentricity and final-state viscous attenuation [1,2] to set new and unique constraints. We will present and discuss a comprehensive set of ASFs for a broad range of $p_T$ and centrality selections for systems selected from U+U, Pb+Pb, Au+Au, Cu+Au, Xe+Xe, Ru+Ru, Zr+Zr, Cu+Cu, O+O, $^3$He+Au, d+Au and p+Au collisions spanning the RHIC-LHC beam energy range, and show that they constrain the eccentricity spectrum for the systems studied, shape deformations in U+U, Xe+Xe, Ru+Ru, and Zr+Zr, and the beam energy (or $T$) dependence of the specific shear viscosity of the plasma. \

[1] STAR collaboration, Phys.Rev.Lett. 122 (2019) 17, 172301

[2] Peifeng Liu and Roy A. Lacey, Phys.Rev.C 98 (2018) 2, 021902