Abstract
We give evidence that fully supersymmetric Anti-de Sitter vacua of extended supergravity with a residual gauge group containing an abelian factor cannot be scale separated as a consequence of the weak gravity conjecture. We prove this for N = 2 and N = 8 supergravity and we explain how our argument applies also to vacua with partially broken, but extended residual supersymmetry. We finally discuss possible loopholes and especially how certain N = 1 models can evade our reasoning. Our results suggest that N = 0, 1 supersymmetry at the lagrangian level might be the most promising chances to obtain a truly four-dimensional effective description of quantum gravity.
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Cribiori, N., Dall’Agata, G. Weak gravity versus scale separation. J. High Energ. Phys. 2022, 6 (2022). https://doi.org/10.1007/JHEP06(2022)006
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DOI: https://doi.org/10.1007/JHEP06(2022)006