The Banks-Zaks expansion in perturbative QCD: an update

The Banks-Zaks expansion in perturbative QCD: an update

The recent QCD calculations of the five-loop beta function and of R(e+e-) to O(alpha_s^4) provide one more term in the Banks-Zaks expansion in (16.5-nf). There is no longer any hope that the expansion could extend, even crudely, to low nf. Above nf=9, however, the results appear to be reasonably con...

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Veröffentlicht in:arXiv.org 2016-07
1. Verfasser: Stevenson, P M
Format: Artikel
Sprache:eng
Schlagworte:
Physics - High Energy Physics - Phenomenology
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Zusammenfassung:The recent QCD calculations of the five-loop beta function and of R(e+e-) to O(alpha_s^4) provide one more term in the Banks-Zaks expansion in (16.5-nf). There is no longer any hope that the expansion could extend, even crudely, to low nf. Above nf=9, however, the results appear to be reasonably consistent from order to order.
ISSN:2331-8422
DOI:10.48550/arxiv.1607.01670