We derive the axion-nucleon interaction Lagrangian in heavy baryon chiral perturbation theory up to next-to-next-to-leading order. The effective axion-nucleon coupling is calculated to a few percent accuracy.

中文翻译：

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手性微扰理论轴子-核子耦合精度计算

我们在重重子手征扰动理论中推导出轴子 - 核子相互作用拉格朗日，直至达到次先行顺序。有效轴子-核子耦合的计算精度只有几个百分点。