| Full text | |
| Author(s): |
Boito, Diogo
;
Hornung, Dirk
;
Jamin, Matthias
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Journal of High Energy Physics; v. N/A, n. 12, p. 17-pg., 2015-12-15. |
| Abstract | |
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-Doctoral |