25–29 Aug 2025
Madison, WI
US/Central timezone

Measurements of electroweak penguin and lepton-flavour violating $B$ decays to final states with missing energy at Belle and Belle II

Not scheduled
20m
Monona Convention Center (Madison, WI)

Monona Convention Center

Madison, WI

Quark Flavor

Speaker

Steven Robertson (IPP / University of Alberta)

Description

The Belle and Belle II experiments have collected a 1.2 ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at a centre-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 and lepton-flavour-violating $B$ decays to final states with missing energy from neutrinos.
Results from $b\to s\nu\bar{\nu}$ processes and their interpretation are presented. In addition, we present searches for the processes $B\to K^{(*)}\tau^+\tau^-$. Finally, we present our searches for the lepton-flavour violating decays $B\to K^{(*)}\tau^{\pm}\ell^{\mp}$, where $\ell$ is an electron or muon.

Author

Steven Robertson (IPP / University of Alberta)

Presentation materials

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