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arXiv 0912.3238hep-lathep-th
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D = 3+1 SU(N)规范理论中基本通量闭环的谱

The spectrum of closed loops of fundamental flux in D = 3+1 SU(N) gauge theories

Andreas Athenodorou, Barak Bringoltz, Michael Teper

摘要:

本文研究了四维SU(N)规范理论中封闭通量管的能谱。我们通过用变分法(其基础由约700个算子组成)计算低激发态的能量来做到这一点。我们研究了角动量、横向宇称、纵向宇称和纵向动量不同值的状态,并将结果与Nambu-Goto(NG)模型等有效的弦论(EST)进行比较。我们的大多数状态与Nambu-Goto的预测非常一致,并且由于我们的大多数通量管的长度都在EST的收敛半径之外,因此对于某些状态,只有NG才能很好地预测光谱。这有力地表明,无害环境技术可以重新汇总。尽管如此,还是有一些态(都是负宇称的,并且在晶格转动群的相同表示中)表现出与NG预言的较大偏差;这些偏差可能为描述大N QCD弦的有效弦论的性质提供线索。

英文摘要:

We study the spectrum of closed flux tubes in four dimensional SU(N) gauge theories. We do so by calculating the energies of the low lying states with the variational technique (whose basis consists of about ~700 operators). We study states of different values of angular momentum, transversal parity, longitudinal parity, and longitudinal momentum, and compare the results with effective string theories (ESTs) such as the Nambu-Goto (NG) model. Most of our states agree very well with the Nambu-Goto predictions and since most of our flux-tubes' lengths are outside the radius of convergence of the ESTs, then for some states it is only the NG that predicts the spectrum well. This strongly suggests that the ESTs can be re-summed. Nonetheless, there are a few states (all with negative parity and in the same representation of the lattice rotation group) that exhibit large deviations from the NG predictions; these deviations might provide clues to the nature of the effective string theory describing the large-N QCD string.

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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