期刊
PHYSICS LETTERS B
卷 811, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135870
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资金
- CIDEGENT program [CIDEGENT/2019/015]
- spanish national grant [PID2019-106080GB-C21]
- Spanish Ministerio de Economia y Competitividad
- European FEDER funds [FIS2017-84038-C2-1-P B, FIS2017-84038-C2-2-P B]
- European Union's Horizon 2020 research and innovation programme [824093]
We recall the predictions made ten years ago about a bound state of J(P) = 0(+) in I = 0 of the D*(K) over bar* system, which is manifestly exotic, and we associate it to the X-0(2866) state reported in the recent LHCb experiment. Fine tuning the parameters to reproduce exactly the mass and width of the X-0(2866) state, we report two more states stemming from the same interaction, one with 1(+) and the other with 2(+). For reasons of parity, the 1(+) state cannot be observed in D (K) over bar decay, and we suggest to observe it in the D*(K) over bar spectrum. On the other hand, the 2(+) state can be observed in D (K) over bar decay but the present experiment has too small statistics in the region of its mass to make any claim. We note that measurements of the D*(K) over bar spectrum and of the D (K) over bar with more statistics should bring important information concerning the nature of the X-0(2866) and related ones that could be observed. (C) 2020 The Author(s). Published by Elsevier B.V.
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