2019/10/31 by Ming-Yang Yang, Ping Wang
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1088/1674-1137/44/5/053101
published as Chin.Phys.C 44 (2020) 5, 053101 · 11 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1805.11986, arXiv:1711.05896
arxiv created 2020/01/24 · arxiv updated 2020/09/21
The sea quark contributions to the nucleon electromagnetic form factors from up, down and strange quarks are studied with the nonlocal chiral effective Lagrangian. Both octet and decuplet intermediate states are included in the one loop calculation. Compared with the strange form factors, though their signs are the same, the absolute value of the light quark form factors are much larger. For both electric and magnetic form factors, the contribution from d quark is larger than that from u quark. The current lattice data for the light-sea quark form factors are between our sea quark results for u and d.