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arXiv · 2310.12219

Spectra of BPS Strings in 6d Supergravity and the Swampland

Hirotaka Hayashi·Hee-Cheol Kim·Minsung Kim
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Abstract

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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Hirotaka Hayashi, Hee-Cheol Kim, Minsung Kim. 2023-10-18. Spectra of BPS Strings in 6d Supergravity and the Swampland. https://arxiv.org/abs/2310.12219

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