The Complete One-Loop Dilatation Operator of N=4 Super Yang-Mills Theory

TL;DR

This paper derives the complete one-loop dilatation operator for N=4 Super Yang-Mills theory, enabling the calculation of anomalous dimensions of all local operators and exploring integrability in various subsectors.

Contribution

It provides the full psu(2,2|4) one-loop dilatation operator and demonstrates its application across multiple subsectors, including evidence for integrability.

Findings

Complete one-loop dilatation operator derived

Planar anomalous dimensions computed up to dimension 5.5

Evidence for integrability in certain subsectors

Abstract

We continue the analysis of hep-th/0303060 in the one-loop sector and present the complete psu(2,2|4) dilatation operator of N=4 Super Yang-Mills theory. This operator generates the matrix of one-loop anomalous dimensions for all local operators in the theory. Using an oscillator representation we show how to apply the dilatation generator to a generic state. By way of example, we determine the planar anomalous dimensions of all operators up to and including dimension 5.5, where we also find some evidence for integrability. Finally, we investigate a number of subsectors of N=4 SYM in which the dilatation operator simplifies. Among these we find the previously considered so(6) and su(2) subsectors, a su(2|4) subsector isomorphic to the BMN matrix model at one-loop, a u(2|3) supersymmetric subsector of nearly eighth-BPS states and, last but not least, a non-compact sl(2) subsector whose dilatation operator lifts uniquely to the full theory.