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arXiv 0910.3252hep-th
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Yang-Mills(2+1)的Hamilton方法:弦张力的修正

The Hamiltonian Approach to Yang-Mills (2+1): An Update and Corrections to String Tension

V. P. Nair

摘要:

2+1(或3)维的杨-米尔斯理论作为非平凡的规范理论本身和高温下QCD的有效理论是很有趣的。我将回顾我们对这个理论的哈密顿方法的基础,强调对称性,并对其状态进行简短的更新。我们将证明2+1维杨-米尔斯理论的真空波函数的计算是系统展开的最低阶。观测值的期望值可以使用有效的相互作用的手征玻色子理论计算,这也导致了自然的扩展作为一个双重系列的耦合常数(要解释在一个图解微扰系列)和一个特定的运动学因子。在该展开中的第一组校正的计算表明,与最低阶值相比,弦张力被修改约-0.3%至-2.8%。这是在良好的协议与晶格的估计。

英文摘要:

Yang-Mills theories in 2+1 (or 3) dimensions are interesting as nontrivial gauge theories in their own right and as effective theories of QCD at high temperatures. I shall review the basics of our Hamiltonian approach to this theory, emphasizing symmetries with a short update on its status. We will show that the calculation of the vacuum wave function for Yang-Mills theory in 2+1 dimensions is in the lowest order of a systematic expansion. Expectation values of observables can be calculated using an effective interacting chiral boson theory, which also leads to a natural expansion as a double series in the coupling constant (to be interpreted within a resummed perturbation series) and a particular kinematical factor. The calculation of the first set of corrections in this expansion shows that the string tension is modified by about -0.3% to -2.8% compared to the lowest order value. This is in good agreement with lattice estimates.

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