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arXiv · 2507.11610

Non-supersymmetric branes and discrete topological terms

Ivano Basile·Vittorio Larotonda
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Abstract

In a recent work, Tachikawa and Zhang proved the existence of a discrete topological term in the unique non-supersymmetric heterotic string with no tachyons in ten dimensions. This theory features NS5-branes, whose chiral degrees of freedom are not well-understood due to the absence of dualities or supersymmetry. In this paper, we test the consistency of a tentative spectrum obtained by anomaly inflow, studying the relation between the worldvolume theory and the discrete topological term in spacetime. Furthermore, we conduct a bottom-up investigation of lower-dimensional gravitational theories with the same methods.

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Ivano Basile, Vittorio Larotonda. 2025-07-15. Non-supersymmetric branes and discrete topological terms. https://arxiv.org/abs/2507.11610

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