Non-factorizable effects in B-anti-B mixing

Details Non-factorizable effects in B-anti-B mixing Non-factorizable effects in B-anti-B mixing

2003-01-16

arxiv.org/abs/hep-ph/0301118v2

Eur.Phys.J.direct C30 (2003) 006; Eur.Phys.J. C32S1 (2004) 69-90

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 7 figures, RevTex 4 Small changes, included more details in the text

Scientific paper

We study the B-parameter (``bag factor'') for B-anti-B 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/m_Q corrections within heavy quark effective field theory. Perturbative QCD effects below \mu = m_b known from other work are also included. Considering two sets of input parameters, we find that the renormalization invariant B-parameter is B = 1.51 +- 0.09 for B_d and B = 1.40 +- 0.16 for B_s.

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