Implications of b → sμμ anomalies for future measurements of B→K(⁎)νν¯ and K→πνν¯

• Main Authors: Sébastien Descotes-Genon, Svjetlana Fajfer, Jernej F. Kamenik, Martín Novoa-Brunet
• Format: Article
• Language: English
• Published: Elsevier 2020-10-01
• Series: Physics Letters B
• Subjects: Flavour physics; Rare decays; Effective field theory; Beyond the standard model; Minimal flavour violation
• Online Access: http://www.sciencedirect.com/science/article/pii/S0370269320305724

We investigate the consequences of deviations from the Standard Model observed in b→sμμ 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(⁎)νν¯ and K→πνν¯ 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→sμμ deviations.