Recent Results on Charmonia- and Bottomonia-like Particles at Belle

Abstract

The large data sample accumulated by the Belle experiment at KEKB asymmetric energy $e^+ e^-$ collider provides opportunities to study charmonia (bottomonia) and charmonium-like (bottomonium-like) exotic particles. In this review, we report recent results on these topics from Belle, including searches for $B\to h_c K$, $B\to Y(4260)K$, $B\to X(3872/3915) (\to \chi_{c1} \pi^0 ) K$, $B^0 \to X(3872) \gamma$, $e^+e^- \to \gamma \chi_{cJ}$ and a new measurement of the $e^+ e^-\to \Upsilon(nS) \pi^+ \pi^- (n=1,2,3)$ cross sections at energies from 10.52 to 11.02 GeV.