Matter Coupled F(4) Supergravity and the AdS_6/CFT_5 Correspondence

TL;DR

This paper explores matter-coupled F(4) supergravity in six dimensions, analyzing its scalar potential, AdS background solutions, and boundary superconformal fields, with implications for the AdS_6/CFT_5 correspondence and massive IIA supergravity spectra.

Contribution

It provides a detailed computation of the scalar potential, mass spectrum, and boundary superconformal fields in matter-coupled F(4) supergravity, linking bulk supergravity to boundary CFT data.

Findings

Scalar potential admits AdS_6 background for specific gauge coupling

Computed scalar squared masses consistent with AdS/CFT predictions

Predicted features of K-K spectrum in massive IIA supergravity

Abstract

F(4) supergravity, the gauge theory of the exceptional six-dimensional Anti-de Sitter superalgebra, is coupled to an arbitrary number of vector multiplets whose scalar components parametrize the quaternionic manifold $SO(4,n)/SO(4)\times SO(n)$. By gauging the compact subgroup $SU(2)_d \otimes \cG$, where SU(2)_d is the diagonal subgroup of $SO(4)\simeq SU(2)_L\otimes SU(2)_R$ (the R-symmetry group of six-dimensional Poincar\'e supergravity) and $\cG$ is a compact group such that $dim\cG = n$, we compute the scalar potential which, besides the gauge coupling constants, also depends in non trivial way on the parameter m associated to a massive 2-form $B_{\mu\nu}$ of the gravitational multiplet. The potential admits an AdS background for g=3m, as the pure F(4)-supergravity. We compute the scalar squared masses (which are all negative) and retrieve the results dictated by AdS_6/CFT_5 correspondence from the conformal dimensions of boundary operators. The boundary F(4) superconformal fields are realized in terms of a singleton superfield (hypermultiplet) in harmonic superspace with flag manifold SU(2)/U(1)=S^2. We analize the spectrum of short representations in terms of superconformal primaries and predict general features of the K-K specrum of massive type IIA supergravity compactified on warped $AdS_6\otimes S^4$.