期刊
PHYSICS LETTERS B
卷 814, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2021.136120
关键词
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资金
- JSPS Overseas Research Fellowships
- JSPS KAKENHI Grant [JP19K14709]
- CIDEGENT program [CIDEGENT/2019/015]
- Spanishnational grant [PID2019-106080GB-C21]
- Spanish Ministerio de Economia y Competitividad [FIS2017-84038-C2-1-P B, FIS2017-84038-C2-2-P B]
- European FEDER [FIS2017-84038-C2-1-P B, FIS2017-84038-C2-2-P B]
- European Unions Horizon 2020 research and innovation programe [824093]
The study shows that the combination of Ds-D*(0) + D-s*D--(0) couples to J/psi K- and K*(-)eta(c), while the combination of Ds-D*(0) - D-s*D--(0) does not. The coupled channels help to accumulate strength in the reaction, which is crucial for interpreting the experimental results.
We study the e(+)e(-) -> K+(D-s*D--(0) + Ds-D*(0)) reaction recently measured at BESIII, from where a new Z(cs) state has been reported. We study the interaction of (D) over bar D-s* with the coupled channels J/psi K-, K*(-)eta(c), Ds-D*(0), D-s*D--(0) by means of an extension to the charm sector of the local hidden gauge approach. We find that the Ds-D*(0) + D-s*D--(0) combination couples to J/psi K- and K*(-)eta(c), but the Ds-D*(0 ) -D-s*D--(0) combination does not. The coupled channels help to build up strength in the Ds-D*(0) + D-s*D--(0) diagonal scattering matrix close to threshold and, although the interaction is not strong enough to produce a bound state or resonance, it is sufficient to produce a large accumulation of strength at the (D) over bar D-s* threshold in the e(+)e(-) -> K+(D-s*D--(0) + Ds-D*(0)) reaction in agreement with experiment. (C) 2021 The Author(s). Published by Elsevier B.V.
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