Anomalous dimensions of fourquark operators in the large N_f limit
Abstract
The anomalous dimensions of fourquark operators $(\bar q_i q_j)_{VA} (\bar q_k q_l)_{VA}$ are calculated in the large $N_f$ limit. As expected, the result is a convergent series without renormalon ambiguities. Using the approximation of "Naive Nonabelianization", an additional allorder contribution to the anomalous dimension matrix is obtained which is somewhat larger than the exact NLO correction itself. Possible phenomenological applications in nonleptonic B decays and $B^0  \bar B^0$ mixing are briefly considered.
 Publication:

arXiv eprints
 Pub Date:
 October 1997
 DOI:
 10.48550/arXiv.hepph/9710503
 arXiv:
 arXiv:hepph/9710503
 Bibcode:
 1997hep.ph...10503P
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 17 pages, LaTex, two figures