e+e−annihilation into baryon-antibaryon pairs

Abstract

Using generalized-vector-dominance-model-type form factors we calculate the $e^{+}-e^{-}$ production cross sections for the reactions $e^{+}{e}^{-}\to B_{{\frac{1}{2}}^{+}} {\overline{B}}_{{\frac{1}{2}}^{\pm }}$, $B_{{\frac{1}{2}}^{+}}{\overline{B}}_{{\frac{3}{2}}^{\pm }}$, $B_{{\frac{1}{2}}^{+}}{\overline{B}}_{{\frac{5}{2}}^{+}}$, and $B_{{\frac{3}{2}}^{+}}{\overline{B}}_{{\frac{3}{2}}^{+}}$ including all prominent baryon resonances at energies of present and planned $e^{+}-e^{-}$ storage-ring machines. The calculated cross sections indicate that the interference of direct and one-photon decay of the $\psi$ particles into baryon pairs is small.