https://scholars.lib.ntu.edu.tw/handle/123456789/606603
標題: | Measurement of the branching fraction of the decay B+ →π+π-?+ν? in fully reconstructed events at Belle | 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 present an analysis of the exclusive B+→π+π-?+ν? decay, where ? represents an electron or a muon, with the assumption of charge-conjugation symmetry and lepton universality. The study exploits the full ?(4S) data sample collected by the Belle detector, corresponding to 711 fb-1 of integrated luminosity. Events are selected by fully reconstructing one B meson in hadronic decay modes, subsequently determining the properties of the other B meson. We extract the signal yields using a binned maximum-likelihood fit to the missing-mass squared distribution in bins of the invariant mass of the two pions or the momentum transfer squared. We measure a total branching fraction of B(B+→π+π-?+ν?)=[22.7-1.6+1.9(stat)±3.5(syst)]×10-5, where the uncertainties are statistical and systematic, respectively. This result is the first reported measurement of this decay. ? 2021 authors. Published by the American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108893900&doi=10.1103%2fPhysRevD.103.112001&partnerID=40&md5=8c40ffc320ea9334a6d5605be5a9a693 https://scholars.lib.ntu.edu.tw/handle/123456789/606603 |
ISSN: | 24700010 | DOI: | 10.1103/PhysRevD.103.112001 |
顯示於: | 物理學系 |
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