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arXiv 0902.4145hep-phhep-lathep-th
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威尔逊圈关联函数的Euclidean-Minkowski对偶性的非微扰基础

A nonperturbative foundation of the Euclidean-Minkowskian duality of Wilson-loop correlation functions

M. Giordano, E. Meggiolaro

摘要:

在这封信中,我们讨论的威尔逊圈关联函数的软高能散射的问题,直接在功能积分的水平上,在一个真正的非微扰的方式有关的解析性能。策略是从欧几里德理论出发,通过场和坐标变换,将对相关变量$θ$(环之间的相对角度)和$T$(环的半长)的依赖性推到动作中,然后允许它们取复数值。特别是,我们确定的解析域的相关欧几里德关联函数,我们表明,相应的闵可夫斯基量恢复与通常的双解析延续$θ$和$T$在这个域。的功能积分的正式操作是合理的利用晶格正则化。由此导出的新的重标度作用也可以直接用于在软高能散射问题中获得新的见解(从第一原理)。

英文摘要:

In this letter we discuss the analyticity properties of the Wilson-loop correlation functions relevant to the problem of soft high-energy scattering, directly at the level of the functional integral, in a genuinely nonperturbative way. The strategy is to start from the Euclidean theory and to push the dependence on the relevant variables $θ$ (the relative angle between the loops) and $T$ (the half-length of the loops) into the action by means of a field and coordinate transformation, and then to allow them to take complex values. In particular, we determine the analyticity domain of the relevant Euclidean correlation function, and we show that the corresponding Minkowskian quantity is recovered with the usual double analytic continuation in $θ$ and $T$ inside this domain. The formal manipulations of the functional integral are justified making use of a lattice regularisation. The new rescaled action so derived could also be used directly to get new insights (from first principles) in the problem of soft high-energy scattering.

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