Abstract
The threshold behavior of annihilation is considered in the channels , , and , where and are the excited bottom-strange and mesons. It is argued that due to the heavy quark spin symmetry only one coherent combination of the first two channels is produced in the wave as well as the third channel. Thus, if there exist threshold molecular peaks in the considered channels, only two of such peaks can be formed in the annihilation. The properties of such threshold states are discussed, including the heavy-light spin structure and the related transitions to bottomonium plus light mesons, as well as mixing with the channels with and without hidden strangeness.
- Received 19 January 2017
DOI:https://doi.org/10.1103/PhysRevD.95.054017
© 2017 American Physical Society