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arXiv 1811.09448hep-lat
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使用高度改进的交错夸克的$B_c$光谱学

$B_c$ spectroscopy using highly improved staggered quarks

Andrew Lytle, Brian Colquhoun, Christine Davies, Jonna Koponen

摘要:

我们报告的$B_c$基态和径向激发能的计算,获得重魅力高度改进的交错夸克(HISQ)的夸克在MILC规范系综计算,晶格间距下降到$a=0.044$调频。在逐渐精细的晶格上使用HISQ价夸克使我们能够模拟高达$b$ -夸克质量。特别地,我们重点讨论了$B_c(2S)$能量,并将其与O(α_s)改进的非相对论QCD结果和最近的ATLAS实验结果进行了比较.

英文摘要:

We report on a calculation of $B_c$ ground state and radial excitation energies, obtained from heavy-charm highly improved staggered quark (HISQ) correlators computed on MILC gauge ensembles, with lattice spacings down to $a=0.044$ fm. Using HISQ valence quarks on progressively finer lattices allows us to simulate up to the $b$-quark mass. In particular we focus on the $B_c(2S)$ energy, which we compare with O(α_s)-improved non-relativistic QCD results computed on the same ensembles and recent experimental results from ATLAS.

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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