We introduce relativistic charge distributions for targets with arbitrary average momentum, providing a natural interpolation between the usual Breit frame and infinite-momentum frame distributions. Among the remarkable results, we find that Breit frame distributions can be interpreted from a phase-space perspective as internal charge quasi-densities in the rest frame of a localized target, without any relativistic correction. Moreover, we show that the unexpected negative center observed in the unpolarized neutron infinite-momentum frame charge distribution results from a magnetization contribution generated by the Wigner rotation.

中文翻译：

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移动核子的电荷分布

我们为具有任意平均动量的目标引入了相对论的电荷分布，从而在通常的Breit框架和无限动量框架分布之间提供了自然插值。在这些非凡的结果中，我们发现Breit框架分布可以从相空间的角度解释为局部目标其余框架中的内部电荷准密度，而无需任何相对论校正。此外，我们表明，在非极化中子无限动量框架电荷分布中观察到的意外的负中心是由维格纳旋转产生的磁化作用造成的。