Non-factorizable effects in \(B - \overline{B}\) mixing

  • A. Hiorth
  • J.O. Eeg


We study the B-parameter (“bag factor”) for \(B -\overline{B}\) 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 μ = m b known from other work are also included. Considering two sets of input parameters, we find that the renormalization invariant B-parameter is \(\hat{B}=1.51 \pm 0.09\) for B d and \(\hat{B}=1.40 \pm 0.16\) for B s .

PACS: 13.25.Hw – 12.39.Fe – 12.39.Hg


Field Theory Input Parameter Heavy Quark Quark Model Effective Field 
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Copyright information

© Springer-Verlag, Società Italiana di Fisica 2003

Authors and Affiliations

  • A. Hiorth
    • 1
  • J.O. Eeg
    • 1
  1. 1.Department of Physics, University of Oslo, P.O.Box 1048 Blindern, N-0316 OsloNorway

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