Abstract
We analyze the fixed points of QCD at high loop order in a variety of renormalization schemes and gauges across the conformal window. We observe that in the minimal momentum subtraction scheme solutions for the Banks-Zaks fixed point persist for values of Nf below that of the MS¯ scheme in the canonical linear covariant gauge. By treating the parameter of the linear covariant gauge as a second coupling constant we confirm the existence of a second Banks-Zaks twin critical point, which is infrared stable, to five loops. Moreover a similar and parallel infrared stable fixed point is present in the Curci-Ferrari and maximal Abelian gauges which persists in different schemes including kinematic ones. We verify that with the increased available loop order, critical exponent estimates show an improvement in convergence and agreement in the various schemes.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 045006 |
| Tidsskrift | Physical Review D |
| Vol/bind | 108 |
| Udgave nummer | 4 |
| ISSN | 2470-0010 |
| DOI | |
| Status | Udgivet - 15. aug. 2023 |
Bibliografisk note
Funding Information:This work was carried out with the support of the STFC Consolidated Grant ST/T000988/1 (J. A. G.), an EPSRC Studentship EP/R513271/1 (R. H. M.) and an STFC Studentship ST/M503629/1 (R. M. S.).
Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.