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arXiv 0909.1843hep-lat
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具有伴随费米子的大N QCD的体积无关性

Volume independence of large-N QCD with adjoint fermions

Barak Bringoltz, Stephen R. Sharpe

摘要:

有人提出,伴随表象中费米子的四维QCD在大N极限下表现出体积无关性。如果正确,这将意味着物理量的结果可以从模型的单站点版本中获得。体积无关性的一个必要条件是单格点理论的(Z_N)^4中心对称性不破缺。我们探索的相图的理论与一个单一的狄拉克费米子使用威尔逊费米子的颜色在N=8-15的范围内,并确定区域的夸克质量和规范耦合的参数空间中的对称性似乎是未破缺的。我们的证据表明,这个区域包括轻和重夸克,我们的结果是一致的,这个区域扩展到连续极限。

英文摘要:

It has been proposed that four-dimensional QCD with fermions in the adjoint representation exhibits volume-independence in the large-N limit. If correct, this would mean that results for physical quantities could be obtained from the single-site version of the model. A necessary condition for volume-independence is that the (Z_N)^4 center-symmetry of the single-site theory is unbroken. We explore the phase diagram of the theory with a single Dirac fermion using Wilson fermions for a number of colors in the range N=8-15, and identify the region in the parameter space of quark mass and gauge coupling where the symmetry appears to be unbroken. Our evidence suggests that this region includes both light and heavy quarks, and our results are consistent with this region extending to the continuum limit.

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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