Stellar stability in brane-worlds revisited

Abstract We study de Sitter configurations in ten-dimensional string models where supersymmetry is either absent or broken at the string scale. To this end, we derive expressions for the cosmological constant in general warped flux compactifications with localized sources, which yield no-go theorems that extend previous works on supersymmetric cases. We frame our results within a dimensional reduction and connect them to a number of Swampland conjectures, corroborating them further in the absence of supersymmetry. Furthermore, we construct a top-down string embedding of de Sitter brane-world cosmologies within unstable anti-de Sitter landscapes, providing a concrete realization of a recently revisited proposal.

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Cosmological tests of generalized RS brane-worlds with Weyl fluid

10.1063/1.2823810 ◽

2007 ◽

Cited By ~ 5

Author(s):

László Á. Gergely ◽

Zoltán Keresztes ◽

Gyula M. Szabó ◽

Arttu Rajantie ◽

Carlo Contaldi ◽

...

Keyword(s):

Brane Worlds ◽

Cosmological Tests

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DARK GEOMETRY

International Journal of Modern Physics D ◽

10.1142/s0218271804006322 ◽

2004 ◽

Vol 13 (10) ◽

pp. 2275-2279 ◽

Cited By ~ 31

Author(s):

J. A. R. CEMBRANOS ◽

A. DOBADO ◽

A. L. MAROTO

Keyword(s):

Dark Matter ◽

Extra Dimensions ◽

Degrees Of Freedom ◽

Planck Scale ◽

Point Of View ◽

Missing Mass ◽

Brane Worlds ◽

Mass Problem ◽

Extra Space ◽

The Universe

Extra-dimensional theories contain additional degrees of freedom related to the geometry of the extra space which can be interpreted as new particles. Such theories allow to reformulate most of the fundamental problems of physics from a completely different point of view. In this essay, we concentrate on the brane fluctuations which are present in brane-worlds, and how such oscillations of the own space–time geometry along curved extra dimensions can help to resolve the Universe missing mass problem. The energy scales involved in these models are low compared to the Planck scale, and this means that some of the brane fluctuations distinctive signals could be detected in future colliders and in direct or indirect dark matter searches.

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