https://doi.org/10.1140/epjc/s10052-024-12634-8
Regular Article - Theoretical Physics
The Low soft-photon theorem again
1
Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russia
2
Institute for Particle Physics Phenomenology, Durham University, DH1 3LE, Durham, UK
Received:
30
January
2024
Accepted:
1
March
2024
Published online:
15
March
2024
It is shown that contrary to claims of Lebiedowicz et al. (Phys Rev D 105(1):014022, 2022) the formulated in the proper physical variables Low theorem (Low in Phys Rev 110(4):974–977, 1958) for soft photon emission does not require any modification. We also reject the criticism in Lebiedowicz et al. (2022) of the papers (Burnett and Kroll in Phys. Rev. Lett. 20:86–88,1968; Lipatov in Nucl Phys B 307:705–720, 1988). At the same time, we identify some inaccuracies in Burnett and Kroll (1968) 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 (Berestetskii et al. in Quantum electrodynamics. Pergamon Press, Oxford, 1982; Lifshitz and Pitaevsky in Relativistic quantum theory, part 2, Fizmatlit, 2002).
The original online version of this article was revised: In the Abstract, lines 6-7 now reference Burnett and Kroll in Phys. Rev. Lett. 20: 86-88, 1968 instead of Bell and Van Royen. Additionally, in line 9, the reference to Bell and Van Royen (1969) has been replaced with Burnett and Kroll (1968).
An erratum to this article is available online at https://doi.org/10.1140/epjc/s10052-024-12687-9.
Copyright comment corrected publication 2024
© The Author(s) 2024. corrected publication 2024
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