https://scholars.lib.ntu.edu.tw/handle/123456789/606799
標題: | Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle | 作者: | Li S.X WEI-SHU HOU et al. |
公開日期: | 2021 | 卷: | 103 | 期: | 7 | 來源出版物: | Physical Review D | 摘要: | We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90% credibility level is set, more than 3 times better than the best current upper limit. ? 2021 authors. Published by the American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104683173&doi=10.1103%2fPhysRevD.103.072004&partnerID=40&md5=a1b462ef874ecf3062de2c5a2052412b https://scholars.lib.ntu.edu.tw/handle/123456789/606799 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.103.072004 |
顯示於: | 物理學系 |
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