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The Exceptional Sigma Model

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arxiv 1802.00442 v2 pith:SQO2ESV7 submitted 2018-02-01 hep-th

classification hep-th
keywords exceptionalmodelsigmastringconsiderconstructioncorrectcoupling
verification ladder T0 review T1 audit T2 compute T3 formal

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We detail the construction of the exceptional sigma model, which describes a string propagating in the "extended spacetime" of exceptional field theory. This is to U-duality as the doubled sigma model is to T-duality. Symmetry specifies the Weyl-invariant Lagrangian uniquely and we show how it reduces to the correct 10-dimensional string Lagrangians. We also consider the inclusion of a Fradkin-Tseytlin (or generalised dilaton) coupling as well as a reformulation with dynamical tension.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Exotic branes and mixed-symmetry potentials II: Duality rules and exceptional $p$-form gauge fields

    hep-th 2019-09 accept novelty 7.0 of 10

    Mixed-symmetry potentials such as the dual graviton are embedded into exceptional field theory's p-form multiplets, with T- and S-duality rules derived for the E8 case.

  2. Duality-covariant particles and exotic branes

    hep-th 2026-06 unverdicted novelty 6.0 of 10

    Proposes enlarged worldline models with coadjoint orbit terms and generalized worldvolume theories for exotic branes that make E8 duality covariance manifest in a Hamiltonian formulation.

  3. Gauss law constraint in A-theory branes

    hep-th 2026-03 conditional novelty 6.0 of 10

    In D=3 and D=4 A-theory, all consistent solutions of the Gauss-law dimensional-reduction condition are strings, and the brane Virasoro algebra reduces to the ordinary string Virasoro algebra.

  4. Gauged Extended Field Theory and Generalised Cartan Geometry

    hep-th 2025-09 conditional novelty 6.0 of 10

    A systematic Cartan-geometric construction of linearised torsion and curvature hierarchies for generalised geometries with global duality group G and local gauge group H, realised via brane current algebras.

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