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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Anomalous dimensions of four-quark operators and renormalon structure of mesonic two-point correlators

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Boito, Diogo [1, 2] ; Hornung, Dirk [3] ; Jamin, Matthias [4]
Total Authors: 3
[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[3] Barcelona Inst Sci & Technol, IFAE, Bellaterra 08193, Barcelona - Spain
[4] Barcelona Inst Sci & Technol, IFAE, ICREA, Bellaterra 08193, Barcelona - Spain
Total Affiliations: 4
Document type: Journal article
Source: Journal of High Energy Physics; n. 12 DEC 15 2015.
Web of Science Citations: 1

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. (AU)

FAPESP's process: 14/50683-0 - Accurate QCD parameter determination
Grantee:Diogo Rodrigues Boito
Support Opportunities: Scholarships in Brazil - Post-Doctorate