The possibility to compute nucleon electromagnetic form factors in the time-like region by analytic continuation of their space-like expressions, obtained in the framework of a generic model of nucleons, has been explored. We have developed a procedure to analytically solve Fourier transforms of the nucleon electromagnetic current and hence to obtain form factors defined in all kinematic regions and fulfilling the first-principles requirements of analyticity and unitarity. The results obtained in the particular case of the Skyrme model are discussed and compared to data, both in the space-like and time-like region.

中文翻译：

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类时区核子电磁形态因子的解析延拓

已经探索了通过在核子通用模型的框架中获得的类空间表达式的解析延续来计算类时间区域中核子电磁形状因子的可能性。我们开发了一个程序来解析求解核子电磁流的傅立叶变换，从而获得在所有运动学区域中定义的形状因子，并满足解析性和单一性的第一性原理要求。讨论了在 Skyrme 模型的特定情况下获得的结果，并将其与类空间和类时区域的数据进行了比较。