Manifestation of kaonium in the e+e-→K+K- process
Abstract
We analyze the precise data obtained by the CMD-3 experiment on the e+e- annihilation into two charged kaons in the vicinity of the ϕ peak. A perfect fit is obtained only if a pole on the real axis below the reaction threshold is assumed. This can be interpreted as proof of the existence of the 2p state of kaonium, a compound of K+ and K-. The BABAR Collaboration data on the same process supports this conclusion and, in addition, points to the strong interaction as a dominant source of the binding energy. The possibility of discovering 2p kaonium in the e+e-→π+π- process is discussed. The 2p state of K0-onium is indicated on the basis of the CMD-3 e+e-→KS0KL0 data.
- Publication:
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Physical Review D
- Pub Date:
- June 2020
- DOI:
- 10.1103/PhysRevD.101.111501
- arXiv:
- arXiv:2002.07726
- Bibcode:
- 2020PhRvD.101k1501L
- Keywords:
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- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment;
- Nuclear Theory
- E-Print:
- Published version, 5 pages, 2 figures