Calculation of the B-B parameter in the static limit

被引：22

作者：

Christensen, J

Draper, T

McNeile, C

机构：

[1] Department of Physics and Astronomy, University of Kentucky, Lexington, KY

来源：

PHYSICAL REVIEW D | 1997年 / 56卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.56.6993

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate B-B parameter, relevant for (B) over bar(0)-B-0 mixing, from a lattice gauge theory simulation at beta=6.0. The bottom quarks are stimulated 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 B-B(4.33 GeV) = 0.98(-4)(+4) (stat)(-18)(+3) (syst) which corresponds to (B) over cap(B) = 1.40(-6)(+6) (stat)(-26)(+4) (syst) 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. [S0556-2821(97)03023-3].

引用

页码：6993 / 7011

页数：19

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