Speaker
Haruki Kindo
(VPI/KEK)
Description
The Belle and Belle II experiment have collected samples of $e^+e^-$
collision data at centre-of-mass energies near the $\Upsilon(nS)$
resonances. These data have constrained kinematics and low
multiplicity, which allow searches for dark sector particles in the mass
range from a few MeV to 10 GeV. Using a 426 fb$^{-1}$ sample collected
by Belle II, we search for inelastic dark matter accompanied by a dark
Higgs. Using a 711 fb$^{-1}$ sample collected by Belle, we search for
$B\to h + \mathrm{invisible}$ decays, where $h$ is a $\pi$, $K$, $D$,
$D_{s}$ or $p$, and $B\to Ka$, where $a$ is an axion-like particle.
Author
Haruki Kindo
(VPI/KEK)
