Our results should be considered to reinterpret the results of lattice gauge calculation and it can be directly used to extrapolate space-like nucleon electromagnetic form factors to the chiral limit.

• 结果发现核子的电磁形状因子随着夸克质量变化会发生明显的变化，特别在夸克手征质量附近核子形状因子呈现非常强的非线性效应。