https://scholars.lib.ntu.edu.tw/handle/123456789/574681
標題: | Observation of B+ →p Λ ? K+K- and B+ → p ? Λk+K+ OBSERVATION of ... P.-C. LU et al. | 作者: | Lu P.-C. et al. MIN-ZU WANG Chistov, R. Chang, P. Adachi, I. Ahn, J.K. Aihara, H. Al Said, S. Asner, D.M. Atmacan, H. Aulchenko, V. PAO-TI CHANG WEI-SHU HOU |
公開日期: | 2019 | 卷: | 99 | 期: | 3 | 來源出版物: | Physical Review D | 摘要: | We report the study of B+→pΛ?K+K- and B+→p?ΛK+K+ decays using a 772×106 BB? pair data sample recorded on the ? (4S) resonance with the Belle detector at KEKB. The following branching fractions are measured: B(B+→pΛ?K+K-)=(4.10-0.43+0.45±0.50)×10-6, B(B+→p?ΛK+K+)=(3.70-0.37+0.39±0.44)×10-6, B(ηc→pΛ?K-+c.c.)=(2.83-0.34+0.36±0.35)×10-3 and B(B+→pΛ?φ)=(7.95±2.09±0.77)×10-7, where c.c. denotes the corresponding charge-conjugation process. The intermediate resonance decays are excluded in the four-body decay measurements. We also find evidence for B(ηc→Λ(1520)Λ?+c.c.)=(3.48±1.48±0.46)×10-3 and B(B+→Λ(1520)Λ?K+)=(2.23±0.63±0.25)×10-6. No significant signals are found for J/ψ→Λ(1520)Λ?+c.c. and B+→Λ?(1520)ΛK+; we set the 90% confidence level upper limits on their decay branching fractions as <1.80×10-3 and <2.08×10-6, respectively. ? 2019 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-s2.0-85062606141&doi=10.1103%2fPhysRevD.99.032003&partnerID=40&md5=27ad3e79b1fb9903da3bb85b6a439816 https://scholars.lib.ntu.edu.tw/handle/123456789/574681 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.99.032003 |
顯示於: | 物理學系 |
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