Signatures of Light New Particles in $B\to K^{(\ast )}{E}_{\mathrm{miss}}$

Patrick D. Bolton, Svjetlana Fajfer, Jernej F. Kamenik +1

The recent Belle II observation of $B\to K{E}_{\mathrm{miss}}$ challenges theoretical interpretations in terms of Standard Model neutrino final states. Instead, we consider new physics…