Charmonium[-like] states at Belle and BaBar

TL;DR

This paper reviews recent charmonium spectroscopy results from Belle and BaBar, highlighting new charmonium-like states in B decays and $J^{PC}=1^{--}$ resonances from $e^+ e^-$ annihilation, advancing understanding of quarkonium states.

Contribution

It provides the latest experimental findings on charmonium-like states and resonances, enhancing knowledge of quarkonium spectroscopy and exotic hadron states.

Findings

Discovery of new charmonium-like states in B decays

Observation of $J^{PC}=1^{--}$ resonances via photon radiative return

Enhanced understanding of the spectrum of charmonium states

Abstract

Belle and BaBar experiments at the KEKB and PEP-II B-factories provide also an excellent environment for spectroscopy studies. In this report we present recent results in the field of charmonium spectroscopy, focusing on new charmonium-like states observed in B decays, and on $J^{PC}=1^{--}$ resonances created in $e^+ e^-$ annihilation through the photon radiative return.