https://scholars.lib.ntu.edu.tw/handle/123456789/606781
標題: | Measurements of branching fractions and asymmetry parameters of Ξc0→ΛK¯?0 , Ξc0→Σ0 K¯?0 , and Ξc0→Σ+ K?? decays | 作者: | Jia S WEI-SHU HOU et al. |
關鍵字: | Branching fraction; Charm physics; e+-e? Experiments; | 公開日期: | 2021 | 卷: | 2021 | 期: | 6 | 來源出版物: | Journal of High Energy Physics | 摘要: | Using a data sample of 980 fb?1 collected with the Belle detector at the KEKB asymmetric-energy e+e? collider, we study the processes of Ξc0→ΛK¯?0, Ξc0→Σ0K¯?0, and Ξc0→Σ+K?? for the first time. The relative branching ratios to the normalization mode of Ξc0→Ξ?π+ are measured to beB(Ξc0→ΛK¯?0)/B(Ξc0→Ξ?π+)=0.18±0.02(stat.)±0.01(syst.),B(Ξc0→Σ0K¯?0)/B(Ξc0→Ξ?π+)=0.69±0.03(stat.)±0.03(syst.),B(Ξc0→Σ+K??)/B(Ξc0→Ξ?π+)=0.34±0.06(stat.)±0.02(syst.), where the uncertainties are statistical and systematic, respectively. We obtainB(Ξc0→ΛK¯?0)=(3.3±0.3(stat.)±0.2(syst.)±1.0(ref.))×10?3,B(Ξc0→Σ0K¯?0)=(12.4±0.5(stat.)±0.5(syst.)±3.6(ref.))×10?3,B(Ξc0→Σ+K?0)=(6.1±1.0(stat.)±0.4(syst.)±1.8(ref.))×10?3, where the uncertainties are statistical, systematic, and from B(Ξc0→Ξ?π+), respectively. The asymmetry parameters α(Ξc0→ΛK¯?0) and α(Ξc0→Σ+K??) are 0.15 ± 0.22(stat.) ± 0.04(syst.) and ?0.52 ± 0.30(stat.) ± 0.02(syst.), respectively, where the uncertainties are statistical followed by systematic. [Figure not available: see fulltext.] ? 2021, The Author(s). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109127469&doi=10.1007%2fJHEP06%282021%29160&partnerID=40&md5=ad746f05cca997c556f4a290547ae5f2 https://scholars.lib.ntu.edu.tw/handle/123456789/606781 |
ISSN: | 10298479 | DOI: | 10.1007/JHEP06(2021)160 |
顯示於: | 物理學系 |
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