矢量介子及其激发态的讨论

在Regge唯象下, 首先研究自旋-宇称多重态中六个介子质量间的关系式. 运用验证后的关系式, 重点计算基态矢量介子多重态(1³S₁)中尚未观测到的双重粲-底介子 B_c^*的质量. 还计算了径向激发态2³S₁多重态的介子质量和轨道激发态1³G₅介子九重态的质量. 根据计算结果结合实验数据和其他理论进行讨论, 建议在6355 MeV附近寻找和研究 B_c^*介子, 将 D(2600)和 D_s1(2700)分别作为主要成分为 nc(2³S₁)和 sc(2³S₁)的态进行研究; 分别在5812, 5917, 6896 MeV附近寻找矢量介子第一径向激发态 B^*(2S), B_s^*(2S)和 B_c^*(2S). 建议将 ω₅(2250)安排在1³G₅介子九重态的同位旋标量态, 实验上在2259 MeV附近进一步研究 ρ₅(2350)的性质, 在2438 MeV附近寻找和研究 φ₅(1³G₅). 研究结果对于相关介子的自旋-宇称安排和通过实 验寻找新的介子激发态具有重要的参考价值. 关键词： Regge唯象 矢量介子 质量谱

Study of vector mesons and its excited states

Based on the Regge phenomenology, we first study the mass relations for six mesons involving three flavors in one spin-parity multiplet. Using the examined mass relation, mass of the unobserved vector doubly heavy charm-bottom B_c^*(1³S₁) is calculated. Masses of the unobserved radial excited vector (2³S₁) mesons and the orbital excited 1³G₅ meson nonet are given. Our predictions are discussed. We suggest searching B_c^* near 6355 MeV. D(2600) and D_s1(2700) can be considered as candidates for nc(2³S₁ and sc(2³S₁) dominated states, respectively. We suggest searching B^*(2S), B_s^*(2S) and B_c^*(2S) near 5812, 5917 and 6896 MeV, respectively. We suggest restudying ρ₅(2350) near 2259 MeV, searching φ₅(1³G₅) near 2438 MeV and identifying ω₅(2250) as isoscalar member of 1³G₅ nonet. The results may be profoundly useful for the J^P assignment of related states and the discovery of the unobserved excited mesons.
Keywords： Regge phenomenology vector meson mass spectrum