Charmonium and Bottomonium at $e^{+}{e}^{-}$ colliders

Abstract

We review recent charmonium and bottomonium spectroscopy results from the B-factories Belle and \babar. A particular focus is given to the new ${\eta }_c(1S)$ and ${\eta }_c(2S)$ measurement and to the radiative transitions from ${\rm Y}(2S)$ and ${\rm Y}(3S)$ with converted photons.

10 pages, 5 figures, Proceeding of The Ninth International Conference on Flavor Physics and CP Violation (FPCP 2011) Maale Hachamisha, Israel, May 23-27, 2011