$N^{\ast }$ Production from $e^{+}{e}^{-}$ Annihilations

Up to now, the $N^{\ast }$ production from $e^{+}{e}^{-}$ annihilations has been studied only around charmonium region. Charmonium decays to $N^{\ast }$s are analogous to (time-like) EM form factors in that the charm quark annihilation provides a nearly pointlike (ggg) current. Complementary to other sources, such as $\pi N$,$eN$and$\gamma N$reactions,thisnewsourcefor$N^*$ spectroscopy has a few advantages, such as an isospin filter and a low spin filter. The experimental results on $N^{\ast }$ from $e^{+}{e}^{-}$ annihilations and their phenomenological implications are reviewed. Possible new sources on $N^{\ast }$ production from $e^{+}{e}^{-}$ annihilations are discussed.