从格状 QCD 得出的 $u$、$d$ 和 $s$ 轻夸克的抗静电 $\bar Q \bar Q qq$ 电位

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-16 DOI:arxiv-2409.10786

Pedro Bicudo, Marina Krstic Marinkovic, Lasse Müller, Marc Wagner

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引用次数: 0

摘要

我们报告了正在利用 CLS $N_f=2$ gauge 配置和 OpenQ*D 代码库对存在两个轻夸克的反静电-反静电势进行的格子 QCD 计算。我们使用了一组 16 个创造操作符，对应于 8 个扇区，其特征是轻夸克的角动量和奇偶量子数 $qq = (ud - du) / \sqrt{2}$（等空素$0$）、$qq \in \{ uu , (ud + du) /\sqrt{2}, dd \}$（等空间素为1$）和 $qq \in \{us , ds \}$（等空间素为1/2$，奇异性为1$）。我们通过考虑静态反夸克的大量离轴分离和使用树级改进来改进之前的工作。由此得到的电势模糊地表明，在$\bar Q \bar Q$ 间距为$r \gtrapprox$0.5 fm的情况下，存在着单离子交换。

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Antistatic-antistatic $\bar Q \bar Q qq$ potentials for $u$, $d$ and $s$ light quarks from lattice QCD

We report on our ongoing lattice QCD computation of antistatic-antistatic potentials in the presence of two light quarks using the CLS $N_f=2$ gauge configurations and the OpenQ*D codebase. We utilize a set of 16 creation operators, corresponding to 8 sectors characterized by angular momentum and parity quantum numbers for light quarks $qq = (ud - du) / \sqrt{2}$ (isospin $0$), $qq \in \{ uu , (ud + du) / \sqrt{2}, dd \}$ (isospin $1$) and $qq \in \{ us , ds \}$ (isospin $1/2$ and strangeness $-1$). We improve on previous work by considering a large number of off-axis separations of the static antiquarks and by using tree-level improvement. The resulting potentials provide vague indication for one-pion exchange at $\bar Q \bar Q$ separations $r \gtrapprox$ 0.5 fm.

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arXiv - PHYS - High Energy Physics - Phenomenology

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