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Spectra of BPS Strings in 6d Supergravity and the Swampland

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arxiv 2310.12219 v2 pith:BF6HXA2E submitted 2023-10-18 hep-th

Spectra of BPS Strings in 6d Supergravity and the Swampland

Hirotaka Hayashi , Hee-Cheol Kim , Minsung Kim This is my paper
classification hep-th
keywords stringstheoriesconjectureswamplandansatzconjecturesellipticf-theory
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We explore BPS strings in supergravity theories in six-dimensions and related Swampland Conjectures. We first propose a general modular ansatz for bootstrapping elliptic genera of 2d worldvolume theories on strings in the 6d theories. By employing mirror symmetry on F-theory examples, we explicitly compute the elliptic genera and validate our ansatz. We extend this approach to investigate BPS strings and their spectrum in non-geometric 6d theories which have no known F-theory constructions, and confirm the Swampland conjectures, including the Weak Gravity Conjecture, Distance Conjecture, and Emergent String Conjecture. We also discuss tensionless little strings that emerge near infinite-distance limits of strong gauge coupling in the moduli space of certain special theories.

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Cited by 3 Pith papers

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

  1. 6d Supergravity Blocks

    hep-th 2026-07 accept novelty 7.0

    Any consistent 6d (1,0) supergravity is assembled by gluing supergravity blocks (one H-string LST plus positively intersecting external tensors whose Gram matrix has one positive eigenvalue) and enhancing gauges; non-...

  2. Moduli-Space Laplacians, Asymptotic Geometry, and the Emergent String Conjecture

    hep-th 2026-07 conditional novelty 6.0

    Under the Emergent String Conjecture, the logarithm of any principal tower mass has a moduli-space Laplacian eigenvalue quantized to N/(D-d) for KK towers and N/2 for string oscillators, equal to the instanton-weighte...

  3. Rational points in the 6d supergravity landscape and simple current extensions

    hep-th 2026-03 unverdicted novelty 5.0

    Rationality of the 2d SCFT on BPS strings provides a consistency criterion that uniquely determines the elliptic genus and global gauge group in a class of 6d supergravity models without tensor multiplets.