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An alternative to anti-branes and O-planes?
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 5, 013- p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Flux compactifications, dS vacua in string theory, D-branes
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-244605DOI: 10.1007/JHEP05(2014)013ISI: 000347846500005OAI: oai:DiVA.org:uu-244605DiVA: diva2:793295
Available from: 2015-03-06 Created: 2015-02-18 Last updated: 2017-12-04Bibliographically approved

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Danielsson, UlfDibitetto, Giuseppe

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