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The Low soft-photon theorem again

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arxiv 2401.16066 v2 pith:VZG7JSQ5 submitted 2024-01-29 hep-ph hep-ex

The Low soft-photon theorem again

classification hep-ph hep-ex
keywords theoremsoft-photoncaseclaimsclassicconsiderationcontrarycriticism
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It is shown that contrary to claims of Ref. [1] the formulated in the proper physical variables Low theorem [2] for soft photon emission does not require any modification. We also reject the criticism in Ref. [1] of the papers [3,4]. At the same time, we identify some inaccuracies in Ref. [3] in the presentation of the soft-photon theorem for the case of spin-one-half particles. We also point out shortcomings in consideration of the Low theorem in the classic textbooks [5,6].

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