摘要
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 mesonsϕandρinduced 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 vectorϕ,ρmesons M_(ϕ,ρ)(Ω)≃M_(ϕ,ρ)(Ω=0)−szΩ.This behavior contributes to the spin alignment of vector mesonsϕ,ρin an equilibrium medium and naturally explains the negative deviation ofρ00−1/3 for vector mesons.Incidentally,the positive deviation ofρ00−1/3 under the magnetic field can also be easily understood from quark dynamics.
作者
魏明华
黄梅
Minghua Wei;Mei Huang(Institute of Modern Physics,Fudan University,Shanghai 200433,China 2.School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China)
基金
the National Natural Science Foundation of China(NSFC)(12235016,12221005)
the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB34030000)
the start-up funding from the University of Chinese Academy of Sciences(UCAS)
the Fundamental Research Funds for the Central Universities。
