An alternative to anti-branes and O-planes?
2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 5, 013- p.Article in journal (Refereed) Published
In this paper we consider type IIA compactifications in the isotropic Z(2) x Z(2) orbifold with a flux-induced perturbative superpotential combined with non-perturbative effects. Without requiring the presence of O-planes, and simply having D6-branes as local sources, we demonstrate the existence of de Sitter (dS) critical points, where the non-perturbative contributions to the cosmological constant have negligible size. We note, however, that these solutions generically have tachyons. By means of a more systematic search, we are able to find two examples of stable dS vacua with no need for anti-branes or O-planes, which, however, exhibit important non-perturbative corrections. The examples that we present turn out to remain stable even after opening up the fourteen non-isotropic moduli.
Place, publisher, year, edition, pages
2014. no 5, 013- p.
Flux compactifications, dS vacua in string theory, D-branes
IdentifiersURN: urn:nbn:se:uu:diva-244605DOI: 10.1007/JHEP05(2014)013ISI: 000347846500005OAI: oai:DiVA.org:uu-244605DiVA: diva2:793295