Initial Stages 2019

Higher order flow correlations and their non-linear modes in Pb-Pb collisions at sNN = 5.02 TeV with ALICE

25 Jun 2019, 16:09

1m

8th floor Theory Center (Pupin)

Poster Initial conditions for hydrodynamics & transport coefficients Posters

Speaker

Jasper Parkkila (University of Jyväskylä)

Description

One of the primary goals of flow studies in heavy-ion collisions during recent years is a better understanding of the transport properties of the quark-gluon plasma (QGP), such as the temperature dependence of the shear viscosity to entropy ratio, $\eta /s(T)$. Flow observables, such as the higher order harmonics (n>3) and their non-linear responses to the initial state anisotropy have a strong potential to constrain $\eta /s(T)$ because of different sensitivities for various stages of heavy-ion collisions. These observables have been published in Pb-Pb collisions at $\sqrt{s_{\mathrm{N}\mathrm{N}}}$ = 2.76 TeV by the ALICE Collaboration. However, only harmonics up to the fifth order have been measured with good precision, leaving the orders highly sensitive to $\eta /s$ as predicted un-investigated.

In this talk, we present the measurements of the symmetry-plane correlations and the non-linear coefficients up to the eighth harmonic order in Pb-Pb collisions at $\sqrt{s_{\mathrm{N}\mathrm{N}}}$ = 5.02 TeV for unidentified charged hadrons. In addition, we present the results of $p_{\mathrm{T}}$-differential non-linear flow modes for charged pions, kaons, and (anti-)protons. The results are compared to the lower energy measurements at 2.76 TeV and calculations from state-of-the-art hydrodynamic models.

Presentation materials

IS2019-poster-Jasper.pdf