迷人的新物理在罕见$$B_{s}$$衰变和混合?

S. Jager, M. Kirk, A. Lenz, K. Leslie
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引用次数: 50

摘要

我们系统地研究了夸克能级b→cc s跃迁的新物理对b物理的影响,特别是罕见的b衰变和b介子寿命观测值。我们找到了可行的场景,在这些场景中,罕见的半轻子B衰变可以产生相当大的影响,与实验指示相容,并且可能依赖于双轻子不变质量,同时与辐射B衰变和测量的B宽度差的约束一致。我们展示了,如果效应在弱尺度或更大尺度上产生,强重整化基团效应如何增强对半光子衰变的影响,同时使辐射B衰变基本上不受影响。不同b物理观测的良好互补意味着对LHCb寿命观测的精确测量可能能够证实、改进或排除这种情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Charming New Physics in Rare $$B_{s}$$ Decays and Mixing?
We conduct a systematic study of the impact of new physics in quark-level b→cc s transitions on B physics, in particular rare B decays and B-meson lifetime observables. We find viable scenarios where a sizable effect in rare semileptonic B decays can be generated, compatible with experimental indications and with a possible dependence on the dilepton invariant mass, while being consistent with constraints from radiative B decay and the measured Bs width difference. We show how, if the effect is generated at the weak scale or beyond, strong renormalization-group effects can enhance the impact on semileptonic decays while leaving radiative B decay largely unaffected. A good complementarity of the different B-physics observables implies that precise measurements of lifetime observables at LHCb may be able to confirm, refine, or rule out this scenario.
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