English

Higher logarithms and $\varepsilon$-poles for the MS-like renormalization prescriptions

High Energy Physics - Theory 2023-11-23 v2 High Energy Physics - Phenomenology

Abstract

We consider a version of dimensional regularization (reduction) in which the dimensionful regularization parameter Λ\Lambda is in general different from the renormalization scale μ\mu. Then in the scheme analogous to the minimal subtraction the renormalization constants contain ε\varepsilon-poles, powers of lnΛ/μ\ln\Lambda/\mu, and mixed terms of the structure εqlnpΛ/μ\varepsilon^{-q}\ln^{p}\Lambda/\mu. For the MS-like schemes we present explicit expressions for the coefficients at all these structures which relate them to the coefficients in the renormalization group functions, namely in the β\beta-function and in the anomalous dimension. In particular, for the pure ε\varepsilon-poles we present explicit solutions of the 't~Hooft pole equations. Also we construct simple all-loop expressions for the renormalization constants (also written in terms of the renormalization group functions) which produce all ε\varepsilon-poles and logarithms and establish a number of relations between various coefficients at ε\varepsilon-poles and logarithms. The results are illustrated by some examples.

Keywords

Cite

@article{arxiv.2310.05610,
  title  = {Higher logarithms and $\varepsilon$-poles for the MS-like renormalization prescriptions},
  author = {Nikolai Meshcheriakov and Victoria Shatalova and Konstantin Stepanyantz},
  journal= {arXiv preprint arXiv:2310.05610},
  year   = {2023}
}

Comments

47 pages, the version accepted for publication in JHEP