Comments on "Single meson production in photon-photon collisions and infrared renormalons" [arXiv:0911.5226v1]

TL;DR

This paper critiques and clarifies errors in previous work on single meson production in photon-photon collisions, focusing on subprocess cross sections and Borel transform calculations.

Contribution

It identifies and corrects specific computational errors in prior studies, improving the accuracy of theoretical predictions in this area.

Findings

Errors in subprocess cross section calculations identified

Incorrect derivation of Borel transforms corrected

Previous results in Phys. Rev. D80, 016003 are challenged

Abstract

This paper contains our comments on the work of the authors A. I. Ahmadov \textit{et al.} "Single meson production in photon-photon collisions and infrared renormalons" [arXiv:0911.5226v1 27 Nov 2009]. We draw attention to errors made in this work in calculation of the subprocess cross sections within the frozen and running coupling approaches, in deriving the Borel transforms and Borel resummed expressions for the cross sections in the running coupling approach. We show that the same fatal errors were made by these authors also in their work published in Phys. Rev. D80, 016003 (2009).