We briefly review general concepts of renormalization in quantum field theory and discuss their application to solutions of integral equations with singular potentials in the few-nucleon sector of the low-energy effective field theory of QCD. We also describe a particular subtractive renormalization scheme and consider a specific application to a toy-model with a singular potential serving as its effective field theoretical leading-order approximation.

中文翻译：

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有效场论中如何用奇异势重新积分方程

我们简要回顾了量子场论中重新规范化的一般概念，并讨论了它们在QCD低能有效场论的少数核子区域中具有奇异势的积分方程解的应用。我们还描述了一种特殊的减法重归一化方案，并考虑了对具有奇异电位作为其有效场理论前导逼近的玩具模型的特定应用。