Diagonal free field matrix correlators, global symmetries and giant gravitons

Details Diagonal free field matrix correlators, global symmetries and giant gravitons Diagonal free field matrix correlators, global symmetries and giant gravitons

2008-06-11

arxiv.org/abs/0806.1911v2

JHEP 0904:089,2009

Physics

High Energy Physics

High Energy Physics - Theory

42 pages, no figures, comments and refs added

Scientific paper

10.1088/1126-6708/2009/04/089

We obtain a basis of diagonal free field multi-matrix 2-point correlators in a theory with global symmetry group G. The operators fall into irreducible representations of G. This applies for gauge group U(N) at finite N. For composites made of n fundamental fields, this is expressed in terms of Clebsch-Gordan coefficients for the decomposition of the n-fold tensor products of the fundamental field representation in terms of G \times S_n representations. We use this general construction in the case of the SL(2) sector of \cN=4 SYM. In this case, by using oscillator constructions, we reduce the computation of the relevant Clebsch-Gordans coupling infinite dimensional discrete series irreps of SL(2) to a problem in symmetric groups. Applying these constructions we write down gauge invariant operators with a Fock space structure similar to that arising in a large angular momentum limit of worldvolume excitations of giant gravitons. The Fock space structure emerges from Clebsch multiplicities of tensor products of symmetric group representations. We also give the action of the 1-loop dilatation operator of \cN=4 SYM on this basis of multi-matrix operators.

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