中性B介子混合相关衰变常数的标准模型矩阵元
高能物理 - 唯象学
2008-11-26 v2 高能物理 - 实验
高能物理 - 格点
摘要
我们给出了对B_d-\bar B_d和B_s-\bar B_s混合在标准模型中相关矩阵元的quenched晶体格计算结果。也给出相应的SU(3)破坏比值,这些比值可用于约束或确定|V_{td}|。计算在两个晶体格间距下进行,分别对应\beta=6.0和\beta=6.2,采用均值场改进的Sheikholeslami-Wohlert算子描述quark。作为副产品,我们获得了B和D介子的leptonic衰变常数。我们还给出与D^0-\bar D^0混合相关的矩阵元。我们的结果在引言中总结。
引用
@article{arxiv.hep-ph/0011086,
title = {Standard Model Matrix Elements for Neutral B-Meson Mixing and Associated Decay Constants},
author = {UKQCD Collaboration and Laurent Lellouch and C. -J. David Lin},
journal= {arXiv preprint arXiv:hep-ph/0011086},
year = {2008}
}
备注
27 pages (RevTeX), 26 figures, version published in Phys. Rev. D: improved estimate of the systematic error associated with the uncertainty on the strange quark mass and other small improvements to analysis (results change only slightly); correction of typos and minor changes to text; RevTeX formatting