Abstract
For the \( \mathcal{N} \) = 4 superconformal coset theory described by \( \frac{{\mathrm{SU}\left( {N+2\ } \right)}}{{\mathrm{SU}\left( {N\ } \right)}} \) (that contains a Wolf space) with N = 3, the \( \mathcal{N} \) = 2 WZW affine current algebra with constraints is obtained. The 16 generators of the large \( \mathcal{N} \) = 4 linear superconformal algebra are described by those WZW affine currents explicitly. By factoring out four spin- \( \frac{1}{2} \) currents and the spin-1 current from these 16 generators, the remaining 11 generators (spin-2 current, four spin- \( \frac{3}{2} \) currents, and six spin-1 currents) corresponding to the large \( \mathcal{N} \) = 4 nonlinear superconformal algebra are obtained. Based on the recent work by Gaberdiel and Gopakumar on the large \( \mathcal{N} \) = 4 holography, the extra 16 currents, with spin contents \( \left( {1,\frac{3}{2},\frac{3}{2},2} \right),\ \left( {\frac{3}{2},2,2,\frac{5}{2}} \right),\ \left( {\frac{3}{2},2,2,\frac{5}{2}} \right) \), and \( \left( {2,\frac{5}{2},\frac{5}{2},3} \right) \) described in terms of \( \mathcal{N} \) = 2 multiplets, are obtained and realized by the WZW affine currents. As a first step towards \( \mathcal{N} \) = 4\( \mathcal{W} \) algebra (which is NOT known so far), the operator product expansions (OPEs) between the above 11 currents and these extra 16 higher spin currents are found explicitly. It turns out that the composite fields with definite U(1) charges, made of above (11 + 16) currents (which commute with the Wolf space subgroup SU(N = 3) × SU(2) × U(1) currents), occur in the right hand sides of these OPEs.
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Ahn, C. Higher spin currents in Wolf space. Part I. J. High Energ. Phys. 2014, 91 (2014). https://doi.org/10.1007/JHEP03(2014)091
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DOI: https://doi.org/10.1007/JHEP03(2014)091