A study of the static-light BB parameter

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Abstract

We calculate the BB parameter, relevant for B0−B0 mixing, from a lattice gauge theory simulation using the static approximation for the heavy quark and the Wilson action for the light quark and gauge fields. Improved sources, produced by an optimized variational technique, most, reduce statistical errors and minimize excited-state contamination of the ground-state signal. Renormalization of four-fermion operator coefficients, using the Lepage-Mackenzie procedure for estimating typical momentum scales, is linearized to reduce order αs2 uncertainties.

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Presented by J. Christensen at Lattice '96, St. Louis.

Currently at Department of Physics, University of Utah, Salt Lake City, UT 84112.

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