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A note on obstinate tachyons in classical dS solutions
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
2013 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 3, 138- p.Article in journal (Refereed) Published
Abstract [en]

The stabilisation of the dilaton and volume in tree-level flux compactifications leads to model independent and thus very powerful existence and stability criteria for dS solutions. In this paper we show that the sizes of cycles wrapped by orientifold planes are scalars whose scalings in the potential are not entirely model independent, but enough to entail strong stability constraints. For all known dS solutions arising from massive IIA supergravity flux compactifications on SU(3)-structure manifolds the tachyons are exactly within the subspace spanned by the dilaton, the total volume and the volumes of the orientifold cycles. We illustrate this in detail for the well-studied case of the O6 plane compactification on SU(2)xSU(2)/Z_2xZ_2. For that example we uncover another novel structure in the tachyon spectrum: the dS solutions have a singular, but supersymmetric, Minkowski limit, in which the tachyon exactly aligns with the sgoldstino.

Place, publisher, year, edition, pages
2013. no 3, 138- p.
Keyword [en]
dilaton stability, tachyon, orientifold, tree approximation, supersymmetry, supergravity, sgoldstino, Minkowski, scaling
National Category
Subatomic Physics
Research subject
Theoretical Physics
URN: urn:nbn:se:uu:diva-196393DOI: 10.1007/JHEP03(2013)138ISI: 000317522400050OAI: oai:DiVA.org:uu-196393DiVA: diva2:610053
Available from: 2013-03-08 Created: 2013-03-08 Last updated: 2013-06-10Bibliographically approved

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