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=|$$\frac{G_E}{G_M}$$|=(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${}^2$.

12 pages, 2 figures

References in corpus (11)

• Measurement of the proton form factor by studying $e^{+}{e}^{-}\to p\bar{p}$
• Nucleon Electromagnetic Form Factors in the Timelike Region
• Hyperon Form Factors & Diquark Correlations
• First Measurements of Timelike Form Factors of the Hyperons, Lambda0, Sigma0, Sigma+, Xi0, Xi-, and Omega-, and Evidence of Diquark Correlations
• Measurement of the cross section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and observation of an excited $\Xi$ baryon
• Measurement of the cross section for $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ and evidence of the decay $\psi (3770)\to \Lambda \bar{\Lambda }$
• Electromagnetic Transition Form Factors of Baryon Resonances
• Medium Modifications of Hadron Properties and Partonic Processes
• Determination of the ${\Sigma }^{+}$ Timelike Electromagnetic Form Factors
• Measurement of the cross section of $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ at center-of-mass energies between 3.510 and 4.843 GeV
• Measurement of Born cross section of $e^{+}{e}^{-}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ at center-of-mass energies between 3.510 and 4.951 GeV