Hard exclusive baryon-antibaryon production in 2-$\gamma$ collisions

Abstract

We present a perturbative calculation of baryon pair production in two-photon collisions, $\gamma \gamma \to B\bar{B}$, in which baryons are treated as quark-diquark systems. Our approach accounts for constituent mass effects in a systematic way. Taking the diquark-model parameters from foregoing studies of other electron- and photon-induced baryonic reactions, our results agree well with the most recent large momentum-transfer data for the $p\bar{p}$, $\Lambda \bar{\Lambda }$, and ${\Sigma }^0{\bar{\Sigma }}^0$ channels.

Comments: 7 pages, 2 figures; v2: institutions updated, paper unchanged