arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1010.4780hep-lat
收藏

改进交错费米子的$B_K$系统解

Systematic Uncertainties in $B_K$ with Improved Staggered Fermions

Yong-Chull Jang, Taegil Bae, Hyung-Jin Kim, Jangho Kim, Jongjeong Kim, Kwangwoo Kim, Boram Yoon, Weonjong Lee, Chulwoo Jung, Stephen R. Sharpe

摘要:

我们研究了在MILC asqtad晶格上使用HYP-涂抹交错费米子计算$B_K$的三个误差来源。它们是:(1)对轻海夸克质量的依赖;(2)有限体积效应;(3)测量数量增加一个数量级的影响。我们的主要结果是:(1)对轻海夸克质量的依赖比朴素维数分析所预期的要弱,(2)在SU(2)中包括有限体积效应,交错手征微扰理论拟合导致$B_K$的变化非常小,大小为$\approx 0.1%$,(3)增加一个粗MILC晶格上的统计量解决了与其他粗结果的潜在差异。

英文摘要:

We study three sources of error in our calculation of $B_K$ using HYP-smeared staggered fermions on the MILC asqtad lattices. These are (1) dependence on the light sea quark mass; (2) finite volume effects; and (3) the impact of an order of magnitude increase in the number of measurements. Our main results are (1) the dependence on the light sea-quark mass is weaker than expected by naive dimensional analysis, (2) including finite volume effects in SU(2) staggered chiral perturbation theory fits leads to a very small change in $B_K$, of size $\approx 0.1%$, and (3) increasing the statistics on one of the coarse MILC lattices resolves a potential discrepancy with other coarse results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑