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.
Categories: hep-ph