The finite, non-zero mean square neutron charge radius is understood in the present work to have a topological origin from an intrinsic neutron configuration in the Lie group U(3). We introduce up and down quark orbits in the configuration for the neutron mass eigenstate. From reciprocal Gaussian curvatures we infer a mean square charge radius of −0.1075 square fermis a few standard deviations away from the world average of −0.1161 square fermis.

中文翻译：

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内在夸克风味产生的中子电荷半径

在目前的工作中，有限的非零均方中子电荷半径被理解为具有来自李群U (3) 中本征中子构型的拓扑起源。我们在中子质量本征态的配置中引入了上下夸克轨道。从倒数高斯曲率，我们推断出均方电荷半径为 -0.1075 方费米，与 -0.1161 方费米的世界平均值相差几个标准偏差。