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arXiv 2408.09007hep-latnucl-th
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哈密顿量极限下的库仑禁闭

Coulomb confinement in the Hamiltonian limit

Sebastian M. Dawid, Wyatt A. Smith, Arkaitz Rodas, Robert J. Perry, César Fernández-Ramírez, Eric S. Swanson, Adam P. Szczepaniak

AI总结:

本研究针对SU(2)格点规范理论中文献高估库仑弦张力的问题,通过修正瞬时势能的格点定义,重新测定得到库仑弦张力与Wilson圈弦张力的比值为2.0±0.4,修正了此前的高估结果并讨论其唯象意义。

摘要:

Gribov–Zwanziger(格里博夫-赞齐格)图景将禁闭现象归因于库仑规范下QCD(量子色动力学)哈密顿量中的瞬时相互作用项。对于静态夸克-反夸克对,该相互作用会产生随二者间距线性增长的势能。针对SU(2) Yang–Mills(杨-米尔斯)理论的格点研究已测定,基础表示源对应的(库仑)弦张力$σ_{C}$约为Wilson圈弦张力$σ_F$的三倍,远高于Zwanziger变分界$σ_C ≥ σ_F$。我们认为文献中确立的该数值被人为高估了。我们研究了瞬时势能的格点定义,找到了弦张力被增强的来源,并在SU(2)格点规范理论中对其进行了改进测定。我们给出库仑弦张力的保守估计值为$σ_C/σ_F = 2.0 \pm 0.4$,并讨论了其唯象学意义。

英文摘要:

The Gribov--Zwanziger scenario attributes the phenomenon of confinement to the instantaneous interaction term in the QCD Hamiltonian in the Coulomb gauge. For a static quark-antiquark pair, it leads to a potential energy that increases linearly with the distance between them. Lattice studies of the SU(2) Yang--Mills theory determined the corresponding (Coulomb) string tension for sources in the fundamental representation, $σ_{C}$, to be about three times larger than the Wilson loop string tension, $σ_F$. It is far above the Zwanziger variational bound, $σ_C \geq σ_F$. We argue that the value established in the literature is artificially inflated. We examine the lattice definition of the instantaneous potential, find the source of the string tension's enhancement, and perform its improved determination in SU(2) lattice gauge theory. We report our conservative estimate for the value of the Coulomb string tension as $σ_C/σ_F = 2.0 \pm 0.4$ and discuss its phenomenological implications.

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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