Fine structure of anomalous dimensions in N=4 super Yang-Mills theory

Details Fine structure of anomalous dimensions in N=4 super Yang-Mills theory Fine structure of anomalous dimensions in N=4 super Yang-Mills theory

2008-06-23

arxiv.org/abs/0806.3657v2

Nucl.Phys.B809:244-278,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages; v2: minor corrections, reference added

Scientific paper

10.1016/j.nuclphysb.2008.10.013

Anomalous dimensions of high-twist Wilson operators in generic gauge theories occupy a band of width growing logarithmically with their conformal spin. We perform a systematic study of its fine structure in the autonomous SL(2) subsector of the dilatation operator of planar N=4 super Yang-Mills theory which is believed to be integrable to all orders in 't Hooft coupling. We resort in our study on the framework of the Baxter equation to unravel the properties of the ground state trajectory and the excited trajectories in the spectrum. We use two complimentary approaches in our analysis based on the asymptotic solution of the Baxter equation and on the semiclassical expansion to work out the leading asymptotic expression for the trajectories in the upper and lower part of the band and to find how they are modified by the perturbative corrections.

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