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arXiv 1110.2575hep-lat
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用SU从改进的交错费米子中计算$B_K$(3)手征微扰理论

$B_K$ from improved staggered fermions using SU(3) chiral perturbation theory

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

摘要:

本文介绍了基于SU(3)交错手征微扰理论的手征外推法计算含改进交错费米子的$B_K$的最新进展。我们已经积累了显着更高的统计上的粗,细,超细MILC asqtad晶格。这导致减少统计误差和改进的连续外推。我们的更新结果是$\hat{B}_K = B_K(\text{RGI}) = 0.737 \pm 0.003(\text{stat}) \pm 0.046 (\text{sys})$。这与基于SU(2)交错手征微扰理论的手征外推得到的结果是一致的,尽管SU(3)分析的总误差稍大。

英文摘要:

We present recent progress in our calculation of $B_K$ with improved staggered fermions using chiral extrapolations based on SU(3) staggered chiral perturbation theory. We have accumulated significantly higher statistics on the coarse, fine, and ultrafine MILC asqtad lattices. This leads to a reduction in statistical error and an improved continuum extrapolation. Our updated result is $\hat{B}_K = B_K(\text{RGI}) = 0.737 \pm 0.003(\text{stat}) \pm 0.046 (\text{sys})$. This is consistent with the result obtained using chiral extrapolations based on SU(2) staggered chiral perturbation theory, although the total error is somewhat larger with the SU(3) analysis.

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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