DOI: 10.1140/epjcd/s2003-01-006-4
Non-factorizable effects in
mixing
A. Hiorth and J.O. Eeg Department of Physics, University of Oslo, P.O.Box 1048 Blindern, N-0316 Oslo, Norway
aksel.hiorth@fys.uio.no
j.o.eeg@fys.uio.no
(Received 28 February 2003 / Published online 27 March 2003)
Abstract
We study the B-parameter ("bag factor") for
mixing within a recently developed heavy-light chiral quark model. Non-factorizable contributions in terms of gluon condensates and chiral corrections are calculated. In addition, we also consider 1/mQ corrections within heavy quark effective field theory. Perturbative QCD effects below μ = mb known from other work are also included. Considering two sets of input parameters, we find that the renormalization invariant B-parameter is
for Bd and
for Bs.
PACS: 13.25.Hw - 12.39.Fe - 12.39.Hg
© Società Italiana di Fisica, Springer-Verlag 2004
