2born (2born) wrote,

Аннигиляция электронно-позитронной пары с поправками: таки Эдик Кураев что-то упустил?

Electron-positron annihilation to photons at O(α3) revisited: https://arxiv.org/abs/2006.11082
Roman N. Lee
We apply the modern multiloop methods to the calculation of the total cross sections of electron-positron annihilation to 2 and 3 photons exactly in s/m2 with the accuracy O(α3). Examining the asymptotics of our results, we find agreement with Ref. [Andreassi_et_al_1962] and discover mistakes in the results of Refs. [Eidelman&Kuraev_1978,Berends&Kleiss_1981]. This mistake is due to the terms, omitted in differential cross section in Refs. \[Eidelman&Kuraev_1978,Berends&Kleiss_1981], which are peaked in the kinematic region with all three photons being quasi-parallel to the collision axis. After restoring these terms, we find an agreement of the corrected result of Ref. [Berends&Kleiss_1981] with our result.
Tags: КЭД, Мегаучебник или Что я читал и похвалил, люди, наука, разгребая arXiv'ы

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