| Texto completo | |
| Autor(es): |
Boito, Diogo
;
Hornung, Dirk
;
Jamin, Matthias
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of High Energy Physics; v. N/A, n. 12, p. 17-pg., 2015-12-15. |
| Resumo | |
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) | |
| Processo FAPESP: | 14/50683-0 - Determinação precisa de parâmetros da QCD |
| Beneficiário: | Diogo Rodrigues Boito |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |