https://scholars.lib.ntu.edu.tw/handle/123456789/574712
標題: | Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B →xsγ decays | 作者: | Watanuki S. et al. Ishikawa, A. Adachi, I. Aihara, H. Al Said, S. Asner, D.M. Aushev, T. Ayad, R. Babu, V. Badhrees, I. Bakich, A.M. PAO-TI CHANG WEI-SHU HOU MIN-ZU WANG |
公開日期: | 2019 | 卷: | 99 | 期: | 3 | 來源出版物: | Physical Review D | 摘要: | We report measurements of isospin asymmetry Δ0- and difference of direct CP asymmetries ΔACP between charged and neutral B→Xsγ decays. This analysis is based on the data sample containing 772×106BB? pairs that was collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. Using a sum-of-exclusive technique with invariant Xs mass up to 2.8 GeV/c2, we obtain Δ0-=[-0.48±1.49(stat)±0.97(syst)±1.15(f+-/f00)]% and ΔACP=[+3.69±2.65(stat)±0.76(syst)]%, where the last uncertainty for Δ0- is due to the uncertainty on the production ratio of B+B- to B0B?0 in ? (4S) decays. The measured value of Δ0- is consistent with zero, allowing us to constrain the resolved photon contribution in the B→Xsγ, and improve the branching fraction prediction. The result for ΔACP is consistent with the prediction of the SM. We also measure the direct CP asymmetries for charged and neutral B→Xsγ decays. All the measurements are the most precise to date. ? 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 SCOAP 3 . |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062599280&doi=10.1103%2fPhysRevD.99.032012&partnerID=40&md5=43eda4789fc9d981a8ba1f9ef692ab14 https://scholars.lib.ntu.edu.tw/handle/123456789/574712 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.99.032012 |
顯示於: | 物理學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。