The scalar–spinor interaction Lagrangian is presented by the Yukawa potential. In dS ambient space formalism, the interaction Lagrangian of scalar–spinor fields was obtained from a new transformation which is very similar to the gauge theory. The interaction of massless minimally coupled (mmc) scalar and spinor fields was investigated. The Minkowski limit of the mmc scalar field and massive spinor field interaction in the ambient space formalism of de Sitter spacetime is calculated. The interaction Lagrangian and mmc scalar field in the null curvature limit become zero and the local transformation in the null curvature limit become a constant phase transformation and the interaction in this limit become zero. The covariant derivative reduces to ordinary derivative too. Then, we conclude that this interaction is due to the curvature of spacetime and then the mmc scalar field may be a part of a gravitational field.

中文翻译：

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闵可夫斯基极限中的德西特标量-旋量相互作用

标量-旋量相互作用拉格朗日由 Yukawa 势呈现。在 dS 环境空间形式中，标量-旋量场的相互作用拉格朗日是从一个与规范理论非常相似的新变换获得的。研究了无质量最小耦合 (mmc) 标量场和旋量场的相互作用。计算了德西特时空环境空间形式中mmc标量场与大质量旋量场相互作用的Minkowski极限。零曲率极限中的相互作用拉格朗日和mmc标量场变为零，零曲率极限中的局部变换变为恒定相变，并且该极限中的相互作用变为零。协变导数也简化为普通导数。然后，