$Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state

Abstract

Motivated by the Belle Collaboration's new observation of $Y(4626)$, we investigate the possibility of its configuration as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state from QCD sum rules. Eventually, the extracted mass $4.60_{-0.19}^{+0.13}\text{mbox}GeV$ for the $P$-wave $cs$-scalar-diquark $\bar{c}\bar{s}$-scalar-antidiquark state agrees well with the experimental data of $Y(4626)$, which could support its interpretation as a $P$-wave scalar-scalar $[cs][\bar{c}\bar{s}]$ tetraquark state.

Comments: 9 pages, 6 figures; version accepted for publication in Phys. Rev. D