论文标题
光学定理和有效的动作：QFT中旧结果的新证明
Optical theorem and effective action: new proofs of old results in QFT
论文作者
论文摘要
在所有订单上都提出了光学定理的新证明。尽管定理是量子场理论的众所周知的结果，但我们的证明很有趣，因为它特别简单。的确，定理是温伯格剑桥书籍中讨论的极点学形式主义的直接结果。我们还讨论了有关有效动作的标准结果的新证明，该作用是生成1PI贡献的功能。
A new proof of the optical theorem at all orders is presented. Although the theorem is a well-known result in Quantum Field Theory, our proof is interesting because it is particularly simple. Indeed, the theorem is a direct consequence of the pole-ology formalism discussed in Weinberg's Cambridge books. We also discuss a new proof of the standard result concerning the effective action as generating functional of 1PI contributions.
