文章基本信息

标题：Model-independent analysis of U-spin breaking in non-leptonic B-decays
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作者：M. JUNG ; T. Mannel
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2009
卷号：2009
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Flavour symmetries represent a powerful tool in analysing model-independently hadronic matrix elements. Going beyond isospin symmetry results, however, in a large uncertainty related to the symmetry breaking due to the relatively large strange quark mass. Considering the U-spin subgroup of flavour SU(3), its breaking is analysed on a group theoretical basis. Due to the simple behaviour of the weak effective hamiltonian under U-spin and the unique structure of the breaking terms, such a group theoretical analysis leads to a manageable number of parameters. In view of the enormous amount of data expected from LHCb and a possible Super B factory, this data driven method provides a way of gathering information on hadronic matrix elements in general and U-spin breaking in particular. As a first application, the pair of decays B− !J/yK− and B− !J/yp− is discussed.