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The process $e^{+}e^{-}\to\Sigma^{+}\bar{\Sigma}^{-}$ is studied fromthreshold up to 3.04 GeV/$c^2$ via the initial-state radiation technique usingdata with an integrated luminosity of 12.0 fb$^{-1}$, collected atcenter-of-mass energies between 3.773 and 4.258 GeV with the BESIII detector atthe BEPCII collider. The pair production cross sections and the effective formfactors of $\Sigma$ are measured in eleven $\Sigma^{+}\bar{\Sigma}^{-}$invariant mass intervals from threshold to 3.04 GeV/$c^2$. The results areconsistent with the previous results from Belle and BESIII. Furthermore, thebranching fractions of the decays $J/\psi\to\Sigma^{+}\bar{\Sigma}^{-}$ and$\psi(3686)\to\Sigma^{+}\bar{\Sigma}^{-}$ are determined and the obtainedresults are consistent with the previous results of BESIII.

Measurements of $\Sigma$ electromagnetic form factors in the time-like region using the untagged initial-state radiation technique