$N^*$ Production from $e^+e^-$ Annihilations

TL;DR

This paper reviews the production of N* resonances in electron-positron annihilations, highlighting its unique advantages and discussing experimental results and potential new sources for N* spectroscopy beyond the charmonium region.

Contribution

It introduces N* production from e+e- annihilations as a novel source for spectroscopy, emphasizing its advantages like isospin and low spin filtering, and discusses recent experimental findings and future prospects.

Findings

Experimental results on N* from e+e- annihilations are summarized.

The phenomenological implications of these results are discussed.

Potential new sources for N* production in e+e- annihilations are explored.

Abstract

Up to now, the $N^*$ production from $e^+e^-$ annihilations has been studied only around charmonium region. Charmonium decays to $N^*$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, this new source for $N^*$ spectroscopy has a few advantages, such as an isospin filter and a low spin filter. The experimental results on $N^*$ from $e^+e^-$ annihilations and their phenomenological implications are reviewed. Possible new sources on $N^*$ production from $e^+e^-$ annihilations are discussed.