期刊
EUROPEAN PHYSICAL JOURNAL C
卷 76, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-016-4144-3
关键词
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资金
- Juan de la Cierva program from the Spanish MINECO [27-13-463B-731]
- Spanish MINECO
- European FEDER [FIS2014-51948-C2-1-P, FIS2014-51948-C2-2-P, FIS2014-57026-REDT, SEV-2014-0398]
- Generalitat Valenciana [PROMETEOII/2014/0068]
- Open Partnership with Spain of JSPS Bilateral Joint Research Projects
- [25400254]
We study the experimental DK invariant mass spectra of the reactions B+ -> (D) over bar (DK+)-D-0-K-0, B-0 -> D-(DK+)-K-0 (measured by the BaBar collaboration) and B-s -> pi(+DK-)-K-0 measured by the LHCb collaboration), where an enhancement right above the threshold is seen. We show that this enhancement is due to the presence of D-s0*(2317), which is a D K bound state in the I (J(P)) = 0(0(+)) sector. We employ a unitarized amplitude with an interaction potential fixed by heavy meson chiral perturbation theory. We obtain a mass M-Ds0* = 2315(-17) (+12 +10)(-5) MeV, and we also show, by means of theWeinberg compositeness condition, that the DK component in the wave function of this state is P-DK = 70(-6 -8)(+4 +4) %, where the first (second) error is statistical (systematic).
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