https://scholars.lib.ntu.edu.tw/handle/123456789/606605
標題: | First determination of the spin and parity of the charmed-strange baryon Ξc (2970)+ | 作者: | PAO-TI CHANG WEI-SHU HOU |
公開日期: | 2021 | 卷: | 103 | 期: | 11 | 來源出版物: | Physical Review D | 摘要: | We report results from a study of the spin and parity of Ξc(2970)+ using a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. The decay angle distributions in the chain Ξc(2970)+→Ξc(2645)0π+→Ξc+π-π+ are analyzed to determine the spin of this charmed-strange baryon. The angular distributions strongly favor the Ξc(2970)+ spin J=1/2 over 3/2 or 5/2, under an assumption that the lowest partial wave dominates in the decay. We also measure the ratio of Ξc(2970)+ decay branching fractions R=B[Ξc(2970)+→Ξc(2645)0π+]/B[Ξc(2970)+→Ξc′0π+]=1.67±0.29(stat)-0.09+0.15(syst)±0.25(IS), where the last uncertainty is due to possible isospin-symmetry-breaking effects. This R value favors the spin-parity JP=1/2+ with the spin of the light-quark degrees of freedom sl=0. This is the first determination of the spin and parity of a charmed-strange baryon. ? 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108519545&doi=10.1103%2fPhysRevD.103.L111101&partnerID=40&md5=6b751d622278e6f524c9e3e7860105a8 https://scholars.lib.ntu.edu.tw/handle/123456789/606605 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.103.L111101 |
顯示於: | 物理學系 |
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