Complementary studies on $N^*$ from $e^+e^-$, $pp$ and $p\bar p$ collisions

B. S. Zou

Published 2009-07-27, updated 2009-08-05Version 2

Complementary to the conventional experimental studies on $N^*$ from $\pi N$ and $\gamma^{(*)}N$ reactions, the $e^+e^-$, $pp$ and $p\bar p$ collisions can give novel insights into these $N^*$ resonances. While the $e^+e^-$ collisions through production and decay of vector charmonium $\psi$ provide a nice isospin filter for a simultaneously study of $N^*$, $\Delta^*$, $\Lambda^*$, $\Sigma^*$ and $\Xi^*$, the $pp$ collisions should be the best place for producing those $\Delta^{*++}$ with large coupling to $\rho^+p$ though $pp\to n\Delta^{*++}$ reaction, and the $p\bar p$ collisions should be the best place for looking for those $N^*$ with large coupling to $\sigma N$.