Remark on the theoretical uncertainty in B0-(B)over-bar0 mixing

被引：46

作者：

Kronfeld, AS

Ryan, SM

机构：

[1] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA

[2] Trinity Coll Dublin, Sch Math, Dublin 2, Ireland

来源：

PHYSICS LETTERS B | 2002年 / 543卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(02)02407-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We re-examine the theoretical uncertainty in the Standard Model expression for B-0-(B) over bar (0) mixing. We focus on lattice calculations of the ratio xi, needed to relate the oscillation frequency of B-s(0)-(B) over bar (0)(s) mixing to the poorly known CKM element V-td. We replace the usual linear chiral extrapolation with one that includes the logarithm that appears in chiral perturbation theory. We find a significant shift in the ratio, from the conventional 1.15 +/- 0.05 to xi = 1.32 +/- 0.10. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：59 / 65

页数：7

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