PANIC2021 Conference

Recent results on charmonium and bottomonium states at Belle

5 Sept 2021, 14:50

20m

Online

Talk Hadron spectroscopy and exotics Hadron spectroscopy and exotics

Speaker

Pavel Krokovny (BINP)

Description

The large data sample accumulated by the Belle experiment at the KEKB asymmetric-energy e^{+} e^{-} collider provides a unique opportunity to perform studies related to hadron spectroscopy utilising various production mechanisms. We studied the two-photon process \gamma\gamma \to \gamma\psi(2S) is studied for the first time and found an evidence for a structure in the \gamma\psi(2S) invariant-mass distribution at 3921.3 \pm 2.4 \pm 1.6\,{\rm MeV}. We report the first measurement of exclusive cross sections for $e^{+}{e}^{-}\to B\overline{B}$, $e^{+}{e}^{-}\to B{\overline{B}}^{\ast }$, and $e^{+}{e}^{-}\to B^{\ast }{\overline{B}}^{\ast }$ in the energy range from $10.63$ to $11.02\mathrm{G}\mathrm{e}\mathrm{V}$. In addition, we report a search for the ${\chi }_{bJ}(nP)$ bottomonium states at Belle. Other studies on conventional or exotic charmoniuum and bottomoniuum are also presented.

Presentation materials

belle_charm_beauti_onia.pdf