Abstract
The and heavy meson systems can exchange a kaon that is emitted in the S-wave due to the opposite intrinsic parity of the and mesons. As a consequence of the mass difference of the and mesons, the range of the kaon exchange potential will be significantly longer than expected, corresponding to an effective mass of about 200 MeV. The potential will be very strong: the strength of the interaction is proportional to and . This combination of range and strength almost guarantees the existence of and bound states with and , , respectively. Concrete calculations indicate a binding energy of 5–15 MeV independently of . The and molecules have manifestly exotic flavor quantum numbers: , , and . We expect the existence of bottom counterparts composed of the and mesons, which will be more bound and have a richer spectrum that might include a shallow P-wave state and an excited S-wave state.
- Received 16 August 2017
- Revised 20 June 2018
DOI:https://doi.org/10.1103/PhysRevD.98.054001
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society