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arXiv 1111.6073hep-thhep-lathep-phmath-phmath.MP
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大N YM中的球传播子

Glueballs propagators in large-N YM

Marco Bochicchio

摘要:

我们在[arXiv:1107.4320(hep-th)]中计算了大N YM理论的某个扇区中的胶球谱,通过改变变量来求解支持在某些拉格朗日子流形上的尖扭量威尔逊圈的全纯环方程,并通过计算支持在这些拉格朗日子流形上的表面算子的扩张子。我们证明了长度为L的复合曲面算子的微扰子在大L极限下再现了相应胶球传播子的微扰理论的主要结果,包括正确的反常维数。本文根据计算胶球上谱和的Migdal技巧,包括Euler公式给出的次领先渐近性,证明了曲面算子的扩张子在大L极限下与由算子乘积展开引起的较强约束相匹配.最后,我们讨论了有限L上曲面算子的扩张子。

英文摘要:

We have computed in [arXiv:1107.4320 (hep-th)] the glueballs spectrum in a certain sector of the large-N YM theory by solving by a change of variables the holomorphic loop equation for cusped twistor Wilson loops supported on certain Lagrangian submanifolds and by evaluating the correlators of surface operators supported on these Lagrangian submanifolds. We have shown that the correlators of composite surface operators of length L reproduce in the large-L limit the leading logarithms of perturbation theory of the corresponding glueballs propagators, including the correct anomalous dimensions. In this paper we show that the correlators of surface operators match in the large-L limit the stronger constraints arising by the operator product expansion, according to Migdal technique of computing the spectral sum over the glueballs including the subleading asymptotics given by the Euler formula. Finally, we discuss correlators of surface operators for finite L.

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