Abstract
We analyze the stability of four-dimensional de Sitter vacua constructed by compactifying massive Type IIA supergravity in the presence of two O8 sources [1]. When embedded in String Theory the first source has a clear interpretation as an O8− plane, but the second one could correspond to either an O8+ plane or to an O8− plane with 16 D8-branes on top. We find that this latter solution has a tachyonic instability, corresponding to the D8 branes moving away from the O8− plane. We comment on the possible ways of distinguishing between these sources.
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Bena, I., De Luca, G.B., Graña, M. et al. Oh, wait, O8 de Sitter may be unstable!. J. High Energ. Phys. 2021, 168 (2021). https://doi.org/10.1007/JHEP03(2021)168
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DOI: https://doi.org/10.1007/JHEP03(2021)168