Speaker
Description
The Belle and Belle II experiments have collected a $1.2~\mathrm{ab}^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment to search for rare electroweak penguin $B$ decays to final states with missing energy from neutrinos. We present new results on $B\to K^{(*)}\nu\bar{\nu}$ using an inclusive tagging technique, including the first results from Belle. We will also present a search for inclusive decays $B\to X_s\nu\bar{\nu}$, where $X_s$ is a hadronic system with strangeness. We will also present searches for the decays $B^+\to K^+\tau^+\tau^-$ and $B^0\to K^0_S\tau^+\tau^-$.
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