On short and semi-short representations for four-dimensional superconformal symmetry |
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Authors: | F.A. Dolan |
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Affiliation: | Department of Applied Mathematics and Theoretical Physics, Silver Street, Cambridge CB3 9EW, UK |
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Abstract: | Possible short and semi-short representations for and superconformal symmetry in four dimensions are discussed. For the well known short supermultiplets whose lowest dimension conformal primary operators correspond to -BPS or -BPS states and are scalar fields belonging to the SU(4) R-symmetry representations [0,p,0] and [q,p,q] and having scale dimension Δ=p and Δ=2q+p, respectively, are recovered. The representation content of semi-short multiplets, which arise at the unitarity threshold for long multiplets, is discussed. It is shown how, at the unitarity threshold, a long multiplet can be decomposed into four semi-short multiplets. If the conformal primary state is spinless one of these becomes a short multiplet. For a -BPS multiplet need not have a protected dimension unless the primary state belongs to a [1,p,1] representation. |
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Keywords: | 11.25.Hf 11.30.Pb |
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