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arXiv 1010.1373hep-lathep-phhep-th
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低温下Yang-Mills理论中约束弦的线性展宽

Linear broadening of the confining string in Yang-Mills theory at low temperature

F. Gliozzi, M. Pepe, U. -J. Wiese

摘要:

系统低能有效场论预言的约束弦的对数展宽最近在零温(2+1)-dSU(2)格点Yang-Mills理论的数值模拟中得到了验证。同样的有效理论预言了弦在非零低温下的线性展宽。在本文中,我们通过与非常精确的Monte Carlo数据进行比较来验证这一预测。比较不涉及额外的可调参数,因为有效理论的低能常数已经固定在零温度。它在基本的杨-米尔斯理论和有效的弦论之间产生了很好的一致性。

英文摘要:

The logarithmic broadening predicted by the systematic low-energy effective field theory for the confining string has recently been verified in numerical simulations of (2+1)-d SU(2) lattice Yang-Mills theory at zero temperature. The same effective theory predicts linear broadening of the string at low non-zero temperature. In this paper, we verify this prediction by comparison with very precise Monte Carlo data. The comparison involves no additional adjustable parameters, because the low-energy constants of the effective theory have already been fixed at zero temperature. It yields very good agreement between the underlying Yang-Mills theory and the effective string theory.

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