Hydrodynamic effects on spin polarization along the beam direction in Au+Au and p+Pb collisions
Abstract
We investigate hydrodynamic effects on the spin polarization of Λ hyperons in Au+Au collisions at √ s NN = 200 GeV and p+Pb collisions at √ s NN = 8.16 TeV using the CLVisc hydrodynamic framework. We present numerical results for the second Fourier sine coefficient of the longitudinal spin polarization, 〈 P z sin 2( ϕ p – Ψ 2 )〉, as a function of multiplicity (centrality) under three equilibrium scenarios: A equilibrium, s -quark equilibrium, and isothermal equilibrium. We highlight the respective roles of thermal vorticity and the thermal-shear tensor in generating 〈 P z sin 2( ϕ p – Ψ 2 )〉 across collision systems and scenarios.
Fields of Study & Subjects
High-Energy Particle Collisions Research
Dust and Plasma Wave Phenomena
Particle physics theoretical and experimental studies
Publication details
- Journal / source
- EPJ Web of Conferences
- Publisher
- EDP Sciences
- Volume
- 364
- Pages
- 03004–03004
- Publication date
- 1 January 2026
- Language
- EN