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arXiv · 2510.15130

Supersymmetric $\alpha'$-corrections to the Generalized Kerr-Schild Ansatz

Jesus A. Rodriguez
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Abstract

We investigate the supersymmetric extension of the generalized Kerr-Schild ansatz (gKSA) in Double Field Theory (DFT) including first-order $\alpha'$ corrections. Supersymmetry plays a central role in constraining higher-derivative deformations, and in this work we focus on the structure of the $\mathcal{O}(\alpha')$ Killing Spinor Equations (KSEs). Starting from the $\alpha'$-corrected supersymmetry transformations of the fermionic fields, we derive the corresponding KSEs in DFT and analyze their behavior under the gKSA. The generalized Green-Schwarz transformations impose specific constraints on the perturbations that ensure the linearization of the $\alpha'$-corrected KSEs. We then provide the explicit parameterization of the results in terms of the ten-dimensional $\mathcal{N}=1$ supergravity fields. Our construction establishes a unified framework for exploring supersymmetric backgrounds in $\alpha'$-corrected DFT and offers new tools for generating higher-derivative supergravity solutions.

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Jesus A. Rodriguez. 2025-10-16. Supersymmetric $\alpha'$-corrections to the Generalized Kerr-Schild Ansatz. https://doi.org/10.1007/jhep01(2026)038

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