We study the sea quark contributions to the electromagnetic form factors of Σ baryons with nonlocal chiral effective theory. Both octet and decuplet intermediate states are included in the one loop calculation. GΣ−u and GΣ+d could be priority observables for the examination of sea quark contributions to the baryon structure because these quantities are much larger than the strange form factors of nucleons. It will be less difficult for the lattice simulation to determine the sign of these pure sea quark contributions unambiguously. In Σ0, the light sea quark form factors GΣ0u and GΣ0d are identical. Since the light sea quark form factors in protons are different, it will be more meaningful to compare the lattice result of the light sea quark form factors in Σ0 with that obtained from an effective field theory.

• Received 26 October 2021
• Accepted 13 December 2021

DOI:https://doi.org/10.1103/PhysRevD.105.016006

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Published by the American Physical Society