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arXiv 0910.5576hep-lat
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用改进的交错费米子确定$B_K$(I):SU(3)手征微扰理论拟合

Determination of $B_K$ using improved staggered fermions (I): SU(3) chiral perturbation theory fit

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

摘要:

我们提出的结果$B_K$计算HYP涂抹交错费米子使用的晶格产生的MILC合作使用asqtad交错行动。我们对这些晶格的8个系综进行了计算,包括三种不同的晶格间距($a=0.12, 0.09, 0.06$ fm)。我们根据SU(3)混合作用部分猝灭交错手征微扰理论的预测,将数据拟合为形式。我们的初步结果是$ B_K(\text{NDR},μ=2\text{GeV}) = 0.528 \pm 0.011 \pm 0.048 $,其中第一个错误是统计的,第二个是系统的。结果表明,该误差比用SU(2)手征微扰理论分析的误差要大。

英文摘要:

We present the results for $B_K$ calculated using HYP-smeared staggered fermions using lattices generated by the MILC collaboration using the asqtad staggered action. We have done the calculation on 8 ensembles of these lattices, including three different lattice spacings ($a=0.12, 0.09, 0.06$ fm). We fit the data to forms based on those predicted by SU(3) mixed-action partially-quenched staggered chiral perturbation theory. Our preliminary result is $ B_K(\text{NDR},μ=2\text{GeV}) = 0.528 \pm 0.011 \pm 0.048 $, where the first error is statistical and the second systematic. The error turns out to be larger than that from an analysis using SU(2) chiral perturbation theory.

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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