The most general QCD next-to-leading anomalous-dimension matrix of all possible four-fermion, dimension-six ΔF=2 operators is computed. The results of this calculation can be used in many phenomenological applications, among which the most important are those related to theoretical predictions of K0−Kˉ0 and B0−Bˉ0 mixing in several extension of the Standard Model (Supersymmetry, left-right symmetric, multi-Higgs models, etc.), to estimates of the Bs0--Bˉs0 width difference, ΔΓBs, and to the calculation of the O(1/mb3) corrections for inclusive b-hadron decay rates.
@article{arxiv.hep-ph/9711402,
title = {Next-to-Leading Order QCD Corrections to $\Delta F =2$ effective Hamiltonians},
author = {M. Ciuchini and E. Franco and V. Lubicz and G. Martinelli and I. Scimemi and L. Silvestrini},
journal= {arXiv preprint arXiv:hep-ph/9711402},
year = {2009}
}