6D SCFTs and Gravity
arXiv:1412.6526
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
References in corpus (9)
- Symmetries and Strings in Field Theory and Gravity
- Anomaly polynomial of general 6d SCFTs
- Global aspects of the space of 6D N = 1 supergravities
- Anomaly polynomial of E-string theories
- 6D supergravity without tensor multiplets
- TASI Lectures on Supergravity and String Vacua in Various Dimensions
- A New Model for Elliptic Fibrations with a Rank One Mordell-Weil Group: I. Singular Fibers and Semi-Stable Degenerations
- F-GUTs with Mordell-Weil U(1)'s
- Relative Entropy and Proximity of Quantum Field Theories