We predict the existence of two novel bottomoniumlike states, $Y(10600)$ and $Y(10650)$, as either the $P$-wave $B^{ (*)}\bar{ B}^{ (*)}$ bound state or resonance close to the $B\bar{ B}^{ *}$ and $B^{ *}\bar{ B}^{ *}$ thresholds, respectively, which are dynamically generated in a coupled-channel framework and have quantum numbers $I(J^{ PC})=0(1^{ --})$. The first one $Y(10600)$ is identified as the hidden-bottom partner of the recently established charmoniumlike state $G(3900)$, the first candidate of P-wave dimeson resonance in the heavy flavor sector associated with the $D\bar{ D}^*/\bar{ D}D^*$ scattering dynamics. We predict the line shapes of both $Y(10600)$ and $Y(10650)$ in the cross sections of open bottom processes $e^+e^- \to B\bar{ B}^*$ and $e^+e^- \to B^*\bar{ B}^*$, both of which exhibit a pronounced peak line shape, and we find that existing experimental data from BelleII show obvious indications of $Y(10650)$. These two new states closely mirror the behavior of $G(3900)$, as their predicted masses lie between the well-known $\Upsilon(4S)$ and $\Upsilon(5S)$, suggesting a manifestly exotic nature once they can be observed by the experiment. Therefore, the experimental search for these new bottomoniumlike states would provide critical evidence for a new class of exotic hadrons of the $P$-wave dimeson and would offer decisive insight into the $XYZ$ spectroscopy.
Categories: hep-ph hep-ex