Implications of an enhanced B→Kνν¯ branching ratio
(multi)-TeV-scale, or light new physics is involved. This holds in general if (B+→K+νν¯) exceeds 1.2⋅10−5(1.3⋅10−5) at 1σ (2σ), which tightens with a decreasing upper limit on (B→K∗νν¯), that is in reach of the [...] experiment. In view of the strong constraints on electron-muon universality violation in |Δb|=|Δs|=1 processes, viable explanations are heavy, (5−10)-TeV tree-level new physics mediators that couple only …
