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Symmetry Enhancements in 7d Heterotic Strings

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arxiv 2106.08189 v3 pith:G7726FVQ submitted 2021-06-15 hep-th

Bernardo Fraiman , Héctor Parra De Freitas This is my paper · ORCID
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keywords completegaugeheteroticrealizedalgorithmcomponentcomponentsdata
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We use a moduli space exploration algorithm to produce a complete list of maximally enhanced gauge groups that are realized in the heterotic string in 7d, encompassing the usual Narain component, and five other components with rank reduction realized via nontrivial holonomy triples. Using lattice embedding techniques we find an explicit match with the mechanism of singularity freezing in M-theory on K3. The complete global data for each gauge group is explicitly given.

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  1. More on 8d non-supersymmetric branes and heterotic strings

    hep-th 2025-05 conditional novelty 6.0 of 10

    The E8 non-supersymmetric heterotic string on T^2 has exactly 22 maximal gauge enhancements, found by two independent methods, with massless spectra listed for each.

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