论文标题
$ su（3）_f $对称破裂的测量值
Measurements of $SU(3)_f$ symmetry breaking in $B$ meson decay constants
论文作者
论文摘要
我们介绍了$ su（3）_f $ breaking in $ b $ meson decay decay常数的QCDSF/ukqcd/cssm的更新。 $ b $ quarks是通过各向异性三叶草改良的动作生成的，并经过调整以匹配物理$ b $和$ b^*$梅森的属性。配置使用$ \叠加{M} =（1/3）（2M_L+M_S）$保持恒定以控制对称性破坏效果。将讨论各种系统不确定性的来源，包括连续性外推和外推到物理点的源。我们还提出了新的努力来计算$ f_b $和$ f_ {b_s} $使用多个时间拟合区域的加权平均值。在多个拟合范围内使用自动加权平均技术可以及时调整$ b $ quark，并从拟合范围偏见的$ f_b $和$ f_ {b_s} $中降低系统错误的影响。
We present updates from QCDSF/UKQCD/CSSM on the $SU(3)_f$ breaking in $B$ meson decay constants. The $b$-quarks are generated with an anisotropic clover-improved action, and are tuned to match properties of the physical $B$ and $B^*$ mesons. Configurations are generated with $\overline{m}=(1/3)(2m_l+m_s)$ kept constant to control symmetry breaking effects. Various sources of systematic uncertainty will be discussed, including those from continuum extrapolations and extrapolations to the physical point. We also present new efforts to calculate $f_B$ and $f_{B_s}$ using weighted averages across multiple time fitting regions. The use of an automated weighted averaging technique over multiple fitting ranges allows for timely tuning of the $b$-quark and reduces the impact of systematic errors from fitting range biases in calculations of $f_B$ and $f_{B_s}$
