## Abstract

We calculate the [Formula presented] parameter, relevant for [Formula presented]-[Formula presented] mixing, from a lattice gauge theory simulation at [Formula presented]. The bottom quarks are simulated in the static theory, the light quarks with Wilson fermions. Improved smearing functions produced by a variational technique MOST are used to reduce statistical errors and minimize excited-state contamination of the ground-state signal. We obtain [Formula presented] which corresponds to [Formula presented] = [Formula presented] for the one-loop renormalization-scheme-independent parameter. The systematic errors include the uncertainty due to alternative (less favored) treatments of the perturbatively calculated mixing coefficients; this uncertainty is at least as large as residual differences between Wilson-static and clover-static results. Our result agrees with extrapolations of results from relativistic (Wilson) heavy quark simulations.

Original language | English |
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Pages (from-to) | 6993-7011 |

Number of pages | 19 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 56 |

Issue number | 11 |

DOIs | |

State | Published - 1997 |

## ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)