Speaker
Description
Recent studies of event-plane angular correlations with the $\langle \cos\left(a_{1} n_1 \Psi_{n_1}+\cdots+a_{k} n_k \Psi_{n_k}\right) \rangle$ correlators [1] have indicated its weak sensitivity to final state effects in heavy-ion collisions, suggesting that the correlator is a sensitive probe for the initial state of heavy-ion collisions [2]. These investigations suggest that conducting detailed measurements over a broad range of beam energies can provide additional constraints on the initial conditions and medium properties of the theoretical calculations. In this work, we used the two- through six-particle correlations to extract the beam energy dependence of the higher-order event-plane angular correlations. Our new results will be presented and discussed for several transverse momentum selections and centrality intervals for Au+Au collisions at top RHIC energies. The results will be compared with similar studies performed at the LHC [3]. The measurements will also be compared to several viscous hydrodynamic calculations to understand the initial and final state effects.
[1] $\langle \cos\left(a_{1} n_1 \Psi_{n_1}+\cdots+a_{k} n_k \Psi_{n_k}\right) \rangle =\frac{\langle v_{n_1}^{a_{1}} \;\cdots\; v_{n_k}^{a_{k}} \cos\left(a_{1} n_1 \Psi_{n_1}+\cdots+a_{k} n_k \Psi_{n_k}\right)\rangle}{\sqrt{\langle v_{n_1}^{2a_{1}} \rangle \cdots \langle v_{n_k}^{2a_{k}} \rangle}}\,,$
[2] Niseem Magdy "Characterizing initial- and final-state effects of relativistic nuclear collisions" Phys.Rev.C 107, 024905 (2023), arXiv:2210.14091
[3] ALICE Collaboration "Symmetry plane correlations in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76~TeV", arXiv:2302.01234
| What kind of work does this abstract pertain to? | Experimental |
|---|---|
| Which experiment is this abstract related to? | STAR |
