Exploring the nature of $Y(4230)$ and $Y(4360)$ in B decays

Abstract

Vector charmonium states can be directly produced in the $e^{+}{e}^{-}$ annihilation process. Among them, $Y(4230)$ and $Y(4360)$ splitting from the previously discovered $Y(4260)$ are not easily arranged into the conventional charmonium spectrum, while recent studies have indicated that they have strong couplings to $D{\bar{D}}_1$ and $D^{\ast }{\bar{D}}_1$. In this work, we investigate the production of $Y(4230)$ and $Y(4360)$ as the heavy-quark spin symmetry doublet hadronic molecules of $D{\bar{D}}_1$ and $D^{\ast }{\bar{D}}_1$ in $B$ decays via the triangle diagram mechanism. In particular, we propose that the decay constants of $Y(4230)$ and $Y(4360)$ extracted in $B$ decays are useful for clarifying their nature.

Comments: 16 pages, 4 figures, 3 tables. Accepted for publication in EPJC