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arXiv 0709.3486hep-lathep-phhep-th
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在规范理论中探索基态

Probing the ground state in gauge theories

T. Heinzl, A. Ilderton, K. Langfeld, M. Lavelle, W. Lutz, D. McMullan

摘要:

我们考虑两个非常不同的模型的通量管连接两个重夸克:一个字符串连接的物质领域和库仑描述的两个单独的规范不变的费用。我们比较了它们与紧致U(1)和SU(2)Higgs模型中未知的真实基态的接近程度。在紧致U(1)中的模拟表明,在受限相中弦描述更好,而在非受限相中库仑描述最好;最后的结果与解析计算一致。令人惊讶的是,在非阿贝尔理论中,库仑描述在希格斯和受限相中都更好。这表明两种理论中通量管的宽度有显著差异。

英文摘要:

We consider two very different models of the flux tube linking two heavy quarks: a string linking the matter fields and a Coulombic description of two separately gauge invariant charges. We compare how close they are to the unknown true ground state in compact U(1) and the SU(2) Higgs model. Simulations in compact U(1) show that the string description is better in the confined phase but the Coulombic description is best in the deconfined phase; the last result is shown to agree with analytical calculations. Surprisingly in the non-abelian theory the Coulombic description is better in both the Higgs and confined phases. This indicates a significant difference in the width of the flux tubes in the two theories.

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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