协变旁观者理论中任意自旋和宇称的重介子和重轻介子
Heavy and heavy-light mesons with arbitrary spin and parity in the Covariant Spectator Theory
AI总结：
该研究推广协变旁观者理论描述任意自旋宇称夸克 - 反夸克介子，改进相互作用核，通过全局拟合重介子和重轻介子质量，用八个参数出色描述谱并预测未测量态及\(J^P\)归属，支持多种介子态鉴定。
AI中文摘要：
本工作将单通道协变旁观者理论（CST）形式主义进行推广，以描述任意自旋宇称\(J^P\)的夸克 - 反夸克介子。通过纳入强耦合的动量依赖性来改进夸克 - 反夸克相互作用核。在此框架内，对实验确定的\(J^P = 0^\pm, 1^\pm, 2^\pm\)和\(3^\pm\)的重介子和重轻介子质量进行全局拟合。仅用八个可调参数，该模型就能出色地全局描述观测到的夸克 - 反夸克谱，并预测未测量的态以及对量子数未确认态的可能\(J^P\)归属。特别是，结果支持将最近观测到的\(B_c(1P)^+\)候选者鉴定为\(0^+\)、\(1^+\)和\(2^+\)态，\(B_c^{*+}\)为底 - 粲夸克能区最低的\(1^-\)态，以及\(D_{s1}(2933)^+\)为粲-奇异能区的轴矢量态。
英文摘要：
This work generalizes the one-channel Covariant Spectator Theory (CST) formalism to describe quark-antiquark mesons of arbitrary spin-parity $J^P$. We also improve the quark-antiquark interaction kernel by incorporating the momentum dependence of the strong coupling. Within this framework, we perform global fits to the masses of experimentally established heavy and heavy-light mesons with $J^P=0^\pm, 1^\pm, 2^\pm,$ and $3^\pm$. With only eight adjustable parameters, the model yields an excellent global description of the observed quark-antiquark spectrum and predicts both unmeasured states and likely $J^P$ assignments for states with unconfirmed quantum numbers. In particular, our results support the identifications of the recently observed $B_c(1P)^+$ candidates as $0^+$, $1^+$, and $2^+$ states, and the $B_c^{*+}$ as the lowest $1^-$ state in the bottom-charm sector, as well as the $D_{s1}(2933)^+$ as axial-vector state in the charm-strange sector.
