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arXiv 1003.4193hep-thhep-ph
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Regge极限下的交换共形对称与对偶共形对称

Commuting Conformal and Dual Conformal Symmetries in the Regge limit

Johan Gunnesson

摘要:

本文继续研究BFKL方程的对偶SL(2,C)对称性,类似于N=4的Super Yang Mills的对偶共形对称性。与四维规范理论中的普通对称和对偶共形对称相反,我们发现普通对称和对偶SL(2,C)对称不生成杨数。代数结构仍然让人想起N=4 SYM,然而,人们可以从对偶SL(2,C)中提取一个生成元,接近与杨代数相关的双局部形式。我们还讨论了对偶SL(2,C)对称性,这在其原始形式是打破IR效应,是否被打破在一个受控的方式,类似于N=4的对偶共形对称性满足一个异常的沃德恒等式的方式。至少对于最低阶,似乎可以通过变形其表示来恢复对偶SL(2,C),保持它是BFKL的精确对称的可能性。

英文摘要:

In this paper we continue our study of the dual SL(2,C) symmetry of the BFKL equation, analogous to the dual conformal symmetry of N=4 Super Yang Mills. We find that the ordinary and dual SL(2,C) symmetries do not generate a Yangian, in contrast to the ordinary and dual conformal symmetries in the four-dimensional gauge theory. The algebraic structure is still reminiscent of that of N=4 SYM, however, and one can extract a generator from the dual SL(2,C) close to the bi-local form associated with Yangian algebras. We also discuss the issue of whether the dual SL(2,C) symmetry, which in its original form is broken by IR effects, is broken in a controlled way, similar to the way the dual conformal symmetry of N=4 satisfies an anomalous Ward identity. At least for the lowest orders it seems possible to recover the dual SL(2,C) by deforming its representation, keeping open the possibility that it is an exact symmetry of BFKL.

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