First search for $B\to X_s\nu \bar{\nu }$ decays

Belle II Collaboration, M. Abumusabh, I. Adachi +440

We report the first search for the flavor-changing neutral-current decays $B\to X_s\nu \bar{\nu }$, where $X_s$ is a hadronic system with strangeness equal to 1, in data coll…