Recent $B^{+}\to K^{+}\nu \bar{\nu }$ excess and muon $g-2$ illuminating light dark sector with Higgs portal

Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko

The Belle II collaboration recently announced that they observed the $B^{+}\to K^{+}\nu \bar{\nu }$ decay process for the first time. This dineutrino mode of $B^{+}\to K^{+}\nu \bar{\nu }$ has been…