6D SCFTs and Gravity

Abstract

We study how to couple a 6D superconformal field theory (SCFT) to gravity. In F-theory, the models in question are obtained working on the supersymmetric background R^{5,1} x B where B is the base of a compact elliptically fibered Calabi-Yau threefold in which two-cycles have contracted to zero size. When the base has orbifold singularities, we find that the anomaly polynomial of the 6D SCFTs can be understood purely in terms of the intersection theory of fractional divisors: the anomaly coefficient vectors are identified with elements of the orbifold homology. This also explains why in certain cases, the SCFT can appear to contribute a "fraction of a hypermultiplet" to the anomaly polynomial. Quantization of the lattice of string charges also predicts the existence of additional light states beyond those captured by such fractional divisors. This amounts to a refinement to the lattice of divisors in the resolved geometry. We illustrate these general considerations with explicit examples, focusing on the case of F-theory on an elliptic Calabi-Yau threefold with base P^2 / Z_3.

46 pages, 5 figures

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• 6d $\mathcal{N}=(1,0)$ theories on $S^1/T^2$ and class S theories: part II
• Non-Higgsable abelian gauge symmetry and F-theory on fiber products of rational elliptic surfaces
• M-theory on Elliptic Calabi-Yau Threefolds and 6d Anomalies
• Non-toric bases for elliptic Calabi-Yau threefolds and 6D F-theory vacua
• On the LHC signatures of $SU(5)\times U(1{)}^{\prime }$ F-theory motivated models
• Geometry of 6D RG Flows
• Evidence for C-theorems in 6D SCFTs