Resonant ALP-Portal Dark Matter Annihilation as a Solution to the $B^{\pm }\to K^{\pm }\hat{I}½\bar{\hat{I}}½$ Excess

Kewen Ding, Ying Li, Xuewen Liu +3

The Belle II collaboration recently reported a $2.7\ddot{I}ƒ$ excess in the rare decay $B^{\pm }\to K^{\pm }\hat{I}½\bar{\hat{I}}½$, potentially signaling new physics. We propose an axion-like particle (AL…