arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.4882hep-phhep-ex
收藏

在新物理存在下对B_{d,s}混合角的分析和对Bs -> K0 * anti-K0 * 的修正

An analysis of B_{d,s} mixing angles in presence of New Physics and an update of Bs -> K0* anti-K0*

Sebastien Descotes-Genon, Joaquim Matias, Javier Virto

摘要:

讨论了在新物理条件下测量Bs和Bd系统弱混合角φ s和φ d的一种简单方法。我们提出了一个新的表达式,允许一个直接测量的新物理混合角,如果新物理的贡献显着的混合只。我们将该方法应用于特定的企鹅介导的B->PP,B->PV和B ->VV模式。我们提供了一个非常严格的和简单的约束上的直接CP不对称的所有这些模式,违反这是一个信号的新物理学的衰减。在相同的理论框架内,提出了对Bs-> K 0 * anti-K 0 * 的分支比的更新预测,该预测可以与最近的LHCb分析进行比较。

英文摘要:

We discuss a simple approach to measure the weak mixing angles phi_s and phi_d of the Bs and Bd systems in the presence of New Physics. We present a new expression that allows one to measure directly the New Physics mixing angles if New Physics contributes significantly to the mixing only. We apply the method to specific penguin-mediated B->PP, B->PV and B ->VV modes. We provide a very stringent and simple bound on the direct CP asymmetries of all these modes, the violation of which is a signal of New Physics in decay. Within the same theoretical framework, an updated prediction for the branching ratio of Bs->K0* anti-K0* is presented, which can be compared with a recent LHCb analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑