Abstract We investigate the consequences of deviations from the Standard Model observed in b → s μ μ transitions for flavour-changing neutral-current processes involving down-type quarks and neutrinos. We derive the relevant Wilson coefficients within an effective field theory approach respecting the SM gauge symmetry, including right-handed currents, a flavour structure based on approximate U ( 2 ) symmetry, and assuming only SM-like light neutrinos. We discuss correlations among B → K ( ⁎ ) ν ν ¯ and K → π ν ν ¯ branching ratios in the case of linear Minimal Flavour Violation and in a more general framework, highlighting in each case the role played by various New Physics scenarios proposed to explain b → s μ μ deviations.

中文翻译：

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b → sμμ 异常对 B→K(⁎)νν¯ 和 K→πνν¯ 未来测量的影响

摘要 我们研究了在 b → s μ μ 跃迁中观察到的标准模型偏差对涉及向下型夸克和中微子的风味变化中性电流过程的后果。我们在考虑 SM 规范对称性的有效场论方法中推导出相关的威尔逊系数，包括右手电流、基于近似 U ( 2 ) 对称性的风味结构，并假设只有类 SM 轻中微子。我们讨论了线性最小风味违规情况下 B → K ( ⁎ ) ν ν 和 K → π ν ν ¯ 分支比之间的相关性，并在更一般的框架中，强调了在每种情况下提出的各种新物理场景所扮演的角色解释 b → s μ μ 偏差。