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arXiv 2104.01607gr-qc
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de Sitter环境空间中标量旋量场的相互作用

Scalar spinor fields interaction in de Sitter ambient space formalism

Y. Ahmadi, F. Jalilifard, M. V. Takook

摘要:

在de Sitter环境空间形式中,无质量最小耦合标量场可以由无质量共形耦合标量场和一个常数五矢量$A^α$构成.在此形式下,无质量最小耦合标量场和旋量场的相互作用拉格朗日量中出现了一个常数五矢量$B^α$。这些恒定的五矢量场可以在零曲率极限的相互作用情况下被固定。本文将在树级近似下计算标量-旋量场相互作用的$\cal S$矩阵元。然后,通过将零曲率极限中的$\cal S$矩阵元素与Minkowskian对应物进行比较,固定恒定的五向量$A^α$和$B^α$。

英文摘要:

In de Sitter ambient space formalism, the massless minimally coupled scalar field can be constructed from a massless conformally coupled scalar field and a constant five-vector $A^α$. Also, a constant five-vector $B^α$ appears in the interaction Lagrangian of massless minimally coupled scalar and spinor fields in this formalism. These constant five-vector fields can be fixed in the interaction case in the null curvature limit. Here we will calculate the $\cal S$ matrix elements of scalar-spinor fields interaction in the tree level approximation. Then the constant five-vectors $A^α$ and $B^α$, will be fixed by comparing the $\cal S$ matrix elements in the null curvature limits with the Minkowskian counterparts.

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