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arXiv 1402.0048hep-lathep-ph
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用交错夸克改进$B_K$的测定

Improved determination of $B_K$ with staggered quarks

Taegil Bae, Yong-Chull Jang, Hwancheol Jeong, Chulwoo Jung, Hyung-Jin Kim, Jangho Kim, Jongjeong Kim, Kwangwoo Kim, Sunghee Kim, Weonjong Lee, Jaehoon Leem, Jeo… 展开作者

Taegil Bae, Yong-Chull Jang, Hwancheol Jeong, Chulwoo Jung, Hyung-Jin Kim, Jangho Kim, Jongjeong Kim, Kwangwoo Kim, Sunghee Kim, Weonjong Lee, Jaehoon Leem, Jeonghwan Pak, Sungwoo Park, Stephen R. Sharpe, Boram Yoon

摘要:

我们目前的结果的K介子混合参数$B_K$使用改进的交错费米子上的一组扩大的MILC asqtad晶格。与我们以前的出版物相比,它主要是基于一个单一的合奏在每一个三个晶格间距$a\approx 0.09\;$ fm,$0.06\;$ fm和$0.045\;$ fm,我们增加了七个新的罚款和四个新的超细合奏,与轻和奇怪的海夸克质量的值范围。我们还增加了一个原始合奏的测量次数。这使我们能够在光和奇异海夸克质量中进行受控的外推,这与连续统外推同时进行。这减少了外推误差,提高了我们的误差估计的可靠性。我们的最终结果是$\hat{B}_K = 0.7379 \pm 0.0047 (\text{stat}) \pm 0.0365 (\text{sys})$。

英文摘要:

We present results for the kaon mixing parameter $B_K$ obtained using improved staggered fermions on a much enlarged set of MILC asqtad lattices. Compared to our previous publication, which was based largely on a single ensemble at each of the three lattice spacings $a\approx 0.09\;$fm, $0.06\;$fm and $0.045\;$fm, we have added seven new fine and four new superfine ensembles, with a range of values of the light and strange sea-quark masses. We have also increased the number of measurements on one of the original ensembles. This allows us to do controlled extrapolations in the light and strange sea-quark masses, which we do simultaneously with the continuum extrapolation. This reduces the extrapolation error and improves the reliability of our error estimates. Our final result is $\hat{B}_K = 0.7379 \pm 0.0047 (\text{stat}) \pm 0.0365 (\text{sys})$.

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。

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