Results in $B_s$ physics and bottomonium spectroscopy using the Belle $\Upsilon({\rm 5S})$ data

Abstract

The Belle experiment at KEK accumulated a $121.4~{\rm fb}^{-1}$ sample of $e^+e^-$ collisions at the $\Upsilon(5S)$ resonance. This sample provides ample opportunity for improving the understanding of both the properties of $B_s$ mesons and the spectroscopy of bottomonium states. In this article we describe the recent results obtained from the Belle $\Upsilon(5S)$ data.