Spin alignment of vector mesons from quark dynamics in a rotating medium

Vorticities in heavy-ion collisions（HICs） are supposed to induce spin alignment and polarization phenomena of quarks and mesons.In this work,we analyze the spin alignment of vector mesons φ and ρ induced by rotation from quark dynamics in the framework of the Nambu-Jona-Lasinio（NJL） model.The rotating angular velocity induces mass splitting of spin components for vector φ,ρ mesons Mφ,ρ（Ω）(?)Mφ,ρ（Ω=0）-szΩ.This behavior contributes to the spin alignment of vector mesons φ,ρ in an equilibrium medium and naturally explains the negative deviation of ρ00-1/3 for vector mesons.Incidentally,the positive deviation of ρ00-1/3 under the magnetic field can also be easily understood from quark dynamics.