Speakers
Description
Extraction of the Quark-Gluon Plasma (QGP) transport properties (i.e. specific shear viscosity $\eta/s$) is a prime goal of the heavy-ion programs at the Relativistic Heavy-Ion Collider (RHIC) and the Large Hadron Collider (LHC). Correlators that are sensitive to both initial-state effects and final-state viscous attenuation can give invaluable constraints for temperature ($T$) and chemical potential ($\mu_{B}$) dependence of $\eta/s$. The $\rho(v^{n}_{2},\langle p_{T} \rangle)$ correlator, that gives the strength of the correlation between an event’s mean-transverse momentum $[p_{\mathrm{T}}]$ and its $v_2$ magnitude, shows more sensitivity to the initial state than to final stat effects [1--2]. Correspondingly, the transverse momentum correlator $G_{2}\left(\Delta\eta,\Delta\varphi\right)$ has been shown to be sensitive to $\eta/s$ [3--4]. A comprehensive set of $G_{2}\left(\Delta\eta,\Delta\varphi\right)$ and $\rho(v^{2}_{2},\langle p_{T} \rangle)$ calculations for Au+Au collisions spanning the beam energy range $\sqrt{s_{\rm NN}}$ = 2760--19.6 GeV using the Hydro-hybrid, AMPT and EPOS models, will be presented for several centralities and event shape selections. Our simulated results [1--4] show characteristic beam-energy-dependent and event shape trends that can give significant constraints for the respective influence of initial-state fluctuations, system-size, system-shape, and $\eta/s(\mu_{B},T)$.
[1]~N. Magdy, et al., Phys.Lett.B 821 (2021) 136625
[2]~N. Magdy, et al., arXiv:2111.07406
[3]~N. Magdy, et al., Phys.Rev.C 104 (2021)
[4]~N. Magdy, et al., Eur.Phys.J.C 81 (2021) 8, 779
