Nonspectator Effects and B Meson Lifetimes

Details Nonspectator Effects and B Meson Lifetimes Nonspectator Effects and B Meson Lifetimes

1998-11-09

arxiv.org/abs/hep-ph/9811274v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures, talk presented at the 11th Summer School and Symposium on Nuclear Physics (NuSS'98), "Effective Theories

Scientific paper

We review the B meson lifetime problems and nonspectator effects. The predictions of B meson lifetime ratios depend on four unknown hadronic parameters $B_1$, $B_2$, $\epsilon_1$ and $\epsilon_2$, where $B_1$ and $B_2$ parametrize the matrix elements of color singlet-singlet four-quark operators and $\epsilon_1$ and $\epsilon_2$ the matrix elements of color octet-octet operators. To understand contributions of the nonspectator effects to the B meson lifetime ratios, we derive the renormalization-group improved QCD sum rules for these parameters within the framework of heavy quark effective theory.

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