期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 12, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP12(2015)090
关键词
Renormalization Group; QCD; Renormalization Regularization and Renormalons
资金
- Spanish Consolider-Ingenio Programme CPAN [CSD2007-00042]
- MINECO [CICYT-FEDER-FPA2011-25948, CICYT-FEDER-FPA2014-55613-P]
- Severo Ochoa excellence program of MINECO [SO-2012-0234]
- Secretaria d'Universitats i Recerca del Departament d'Economia i Coneixement de la Generalitat de Catalunya [2014 SGR 1450]
- Sao Paulo Research Foundation (Fapesp) [14/50683-0]
- ICREA Funding Source: Custom
In this work, we calculate leading-order anomalous dimension matrices for dimension-6 four-quark operators which appear in the operator product expansion of flavour non-diagonal and diagonal vector and axial-vector two-point correlation functions. The infrared renormalon structure corresponding to four-quark operators is reviewed and it is investigated how the eigenvalues of the anomalous dimension matrices influence the singular behaviour of the u = 3 infrared renormalon pole. It is found that compared to the large-beta(0) approximation where at most quadratic poles are present, in full QCD at N-f = 3 the most singular pole is more than cubic with an exponent kappa approximate to 3.2.
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