| Full text | |
| Author(s): |
Gardim, Fernando G.
;
Ollitrault, Jean-Yves
Total Authors: 2
|
| Document type: | Journal article |
| Source: | ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT; v. 16, n. 1, p. 6-pg., 2023-01-01. |
| Abstract | |
In recent years, there has been a significant effort to extract the temperature-dependent shear (eta/s) and bulk (zeta/s) viscosity over entropy ratios of the quark-gluon plasma from a global comparison of heavy-ion data with results of hydrodynamic simulations. However, anisotropic flow, which is arguably the most sensitive probe of viscosity, is only sensitive to an effective viscosity over entropy ratio, which is obtained by taking a weighted average over the temperature and summing the contributions of shear and bulk. We estimate this effective viscosity using existing first-principles calculations, which give 0.17 < (eta/s)(eff) < 0.21, and (zeta/s)(eff) < 0.08, implying that the damping of anisotropic flow at the LHC is mostly due to shear viscosity. The values extracted from global data analyses are compatible with these theory predictions. (AU) | |
| FAPESP's process: | 18/24720-6 - Exploring the QCD phase diagram |
| Grantee: | Frédérique Marie Brigitte Sylvie Grassi |
| Support Opportunities: | Research Projects - Thematic Grants |