文章基本信息

标题：On the extraction of |V_ub| using radiative B decays
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作者：M. Neubert
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2001
卷号：2001
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The element jVubj of the quark mixing matrix can be extracted with small theoretical uncertainties by combining weighted integrals over the endpoint regions of the lepton spectrum in B ! Xu l decays and the photon spectrum in B ! Xs decays. The perturbative corrections to this determination are computed at next-to-leading order including operator mixing, which has an important impact. The e ect of Sudakov resummation is shown to be numerically insignicant.