Studying 𝜦 spin polarization with event-by-event hydrodynamics

by Dr Sahr Alzhrani (Wayne State University)

Friday 20 May 2022, 10:00 → 11:00 Asia/Shanghai

B105

We present a systematic study of Λ hyperon’s polarization observables using event-by-event (3+1)D relativistic hydrodynamics. The effects of initial hot spot size and QGP’s specific shear viscosity on the polarization observables are quantified. We examine the effects of the two formulations of the thermal shear tensor on the polarization observables using the same hydrodynamic background. With event-by-event simulations, we make predictions for the Fourier coefficients of Λ’s longitudinal polarization Pz with respect to the event planes of different orders of anisotropic flow. We propose new correlations among the Fourier coefficients of Pz and charged hadron anisotropic flow coefficients to further test the mapping from fluid velocity gradients to hyperon’s polarization. Finally, we present a system size scan with Au+Au, Ru+Ru, and O+O collisions at √sNN = 200 GeV to study the system size dependence of polarization observables at the Relativistic Heavy-ion Collider. Biography: Sahr Alzhrani a graduate student at Wayne state University from Kingdom of Saudi Arabia. She has been working with Dr. Chun since January 2020. Her research focuses on developing the state-of-the-art 3D dynamical framework for relativistic heavy-ion collisions at high energies. She has published one scientific paper in Phys. Rev. C on developing a collision geometry-based 3D initial condition for relativistic heavy-ion collisions. By extending this initial-state model to the event-by-event basis, she recently studied the Λ spin polarization in event-by-event relativistic heavy-ion collisions.  Zoom Meeting: https://cern.zoom.us/j/96357968034?pwd=K2REeGF0V2dqOElRd09hVGVRcDk4Zz09 Meeting ID：963 5796 8034 Pwd：125125