Time-like electromagnetic form factors of $\Lambda,~\Sigma$ and $\Xi^{+}$ in a light-front quark model

Abstract

We use the light front quark model to investigate the form factors in the $e^{+}e^{-} \to B\bar{B}$ collision proceses with $B=\Lambda,~\Sigma$ and $\Xi$. These form factor behaviors are calculated based on the Bethe-Salpeter formalism with $q^{+} > 0$ to effectively account for non-valence contributions. We show that our results of the $q^2$-dependent form factors closely match the BESIII data. In particalar, we obtain that $|G_{eff}| = (0.921,~0.098,~0.189$) and $R =|$$G_E\over G_M$$|= (0.97,~0.89$,~$0.936$) for $e^{+} e^{-}\to \Lambda \bar{\Lambda}$,~$\Sigma^{+} \Sigma^{-},~\Xi^{+} \Xi^{+})$ which $q^2 = (5.74,~6.0,~7.0)$ GeV$^2$.