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arXiv 2005.05723hep-lat
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从弦断裂到夸克偶素谱

From string breaking to quarkonium spectrum

Marco Catillo, Marina Krstić Marinković, Pedro Bicudo, Nuno Cardoso

备注：
Contribution to "Excited QCD 2020" proceedings, 2-8 February 2020, Krynica Zdrój, Poland. Minor notation corrections, typos corrected and references added
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摘要：

本文用O（a）改进的Wilson费米子计算了$n_f=2$ QCD中两静态夸克间的相互作用势。我们探讨了不同的涂抹选择（HYP，HYP 2和APE）和它们对计算的静态电位的信噪比的影响。这是一个更大的努力的一部分，首先，精确计算QCD弦断裂参数，并随后将其用于最近基于Born-Oppenheimer近似的方法（Bicudo et al. 2020 \cite{Bicudo:2019ymo}），以研究夸克偶素共振和束缚态。

英文摘要：

We present a preliminary computation of potentials between two static quarks in $n_f=2$ QCD with O(a) improved Wilson fermions. We explore different smearing choices (HYP, HYP2 and APE) and their effect on the signal to noise ratio in the computed static potentials. This is a part of a larger effort concerning, at first, a precise computation of the QCD string breaking parameters and their subsequent utilization for the recent approach based on Born-Oppenheimer approximation (Bicudo et al. 2020 \cite{Bicudo:2019ymo}) to study quarkonium resonances and bound states.

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