2023/08/27 by Xin-Li Sheng, Shi Pu, Sheng, Xin-Li +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2308.14038
openalex publication_date 2023/08/27 · openalex created_date 2023/08/31 · openalex updated_date 2026/07/28
We study the rapidity and azimuthal angle dependences of the global spin alignment ρ00 for ϕ mesons with respect to the reaction plane in Au+Au collisions at RHIC by the relativistic coalescence model in the spin transport theory. The global spin alignment of ϕ mesons arises from local fluctuations of strong force fields whose values are extracted from the STAR's data. The calculated results show that ρ00<1/3 at the rapidity Y=0, and then it increases with rapidity and becomes ρ00>1/3 at Y=1. Such a rapidity dependence is dominated by the relative motion of the ϕ meson in the bulk matter. We also give prediction for the azimuthal angle dependence of ρ00 at different rapidities.