Oh, wait, O8 de Sitter may be unstable!
- Autori: Iosif Bena; G. Bruno De Luca; Mariana Grana; Gabriele Lo Monaco
- Anno di pubblicazione: 2021
- Tipologia: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/584999
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.