Abstract
We systematically analyse 5d superconformal field theories (SCFTs) obtained by dimensional reduction from 6d \( \mathcal{N} \) = (1, 0) SCFTs. Such theories have a realization as M-theory on a singular Calabi-Yau threefold, from which we determine the so-called combined fiber diagrams (CFD) introduced in [1–3]. The CFDs are graphs that encode the superconformal flavor symmetry, BPS states, low energy descriptions, as well as descendants upon flavor matter decoupling. To obtain a 5d SCFT from 6d, there are two approaches: the first is to consider a circle-reduction combined with mass deformations. The second is to circle-reduce and decouple an entire gauge sector from the theory. The former is applicable e.g. for very Higgsable theories, whereas the latter is required to obtain a 5d SCFT from a non-very Higgsable 6d theory. In the M-theory realization the latter case corresponds to decompactification of a set of compact surfaces in the Calabi-Yau threefold. To exemplify this we consider the 5d SCFTs that descend from non-Higgsable clusters and non-minimal conformal matter theories. Finally, inspired by the quiver structure of 6d theories, we propose a gluing construction for 5d SCFTs from building blocks and their CFDs.
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Apruzzi, F., Schäfer-Nameki, S. & Wang, YN. 5d SCFTs from decoupling and gluing. J. High Energ. Phys. 2020, 153 (2020). https://doi.org/10.1007/JHEP08(2020)153
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DOI: https://doi.org/10.1007/JHEP08(2020)153