Cosmological constant, near brane behavior and singularities

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dc.identifier.uri Gautason, Fridrik Freyr Junghans, Daniel Zagermann, Marco 2017-06-14T12:34:51Z 2017-06-14T12:34:51Z 2013
dc.identifier.citation Gautason, Fridrik Freyr; Junghans, Daniel; Zagermann, Marco: Cosmological constant, near brane behavior and singularities. In: Journal of High Energy Physics 2013 (2013), Nr. 9, 123. DOI:
dc.description.abstract We show that the classical cosmological constant in type II flux compactifications can be written as a sum of terms from the action of localized sources plus a specific contribution from non-trivial background fluxes. Exploiting two global scaling symmetries of the classical supergravity action, we find that the flux contribution can in many interesting cases be set to zero such that the cosmological constant is fully determined by the boundary conditions of the fields in the near-source region. This generalizes and makes more explicit previous arguments in the literature. We then discuss the problem of putting D3-branes at the tip of the Klebanov-Strassler throat glued to a compact space in type IIB string theory so as to engineer a de Sitter solution. Our result for the cosmological constant and a simple global argument indicate that inserting a fully localized and backreacting (D3) over bar -brane into such a background yields a singular energy density for the NSNS and RR 3-form field strengths at the (D3) over bar -brane. This argument does not rely on partial smearing of the (D3) over bar -brane or a linearization of field equations, but on a few general assumptions that we also discuss carefully. eng
dc.language.iso eng
dc.publisher New York, NY : Springer International Publishing
dc.relation.ispartofseries Journal of High Energy Physics 2013 (2013), Nr. 9
dc.rights CC BY 4.0
dc.subject Flux compactifications eng
dc.subject dS vacua in string theory eng
dc.subject D-branes eng
dc.subject Superstring Vacua eng
dc.subject dimensional reduction eng
dc.subject geometry eng
dc.subject.ddc 530 | Physik ger
dc.title Cosmological constant, near brane behavior and singularities
dc.type article
dc.type Text
dc.relation.issn 1029-8479
dc.bibliographicCitation.issue 9
dc.bibliographicCitation.volume 2013
dc.bibliographicCitation.firstPage 123
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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