scholarly journals Cosmological tests of generalized RS brane-worlds with Weyl fluid

2007 ◽  
Author(s):  
László Á. Gergely ◽  
Zoltán Keresztes ◽  
Gyula M. Szabó ◽  
Arttu Rajantie ◽  
Carlo Contaldi ◽  
...  
Keyword(s):  
Brane Worlds ◽  
Cosmological Tests

scholarly journals de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Ivano Basile ◽  
Stefano Lanza
Keyword(s):  
Flux Compactifications ◽  
Cosmological Constant ◽  
Dimensional Reduction ◽  
Brane World ◽  
De Sitter ◽  
Top Down ◽  
Brane Worlds ◽  
Concrete Realization ◽  
String Models ◽  
String Theories

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.

DARK GEOMETRY

2004 ◽  
Vol 13 (10) ◽  
pp. 2275-2279 ◽  
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.

scholarly journals Instantons in 𝒩 = 2 magnetized D-brane worlds

2007 ◽  
Vol 2007 (10) ◽  
pp. 091-091 ◽  
Author(s):  
Marco Billò ◽  
Marialuisa Frau ◽  
Igor Pesando ◽  
Paolo Di Vecchia ◽  
Alberto Lerda ◽  
...  
Keyword(s):  
Brane Worlds

scholarly journals Curvaton dynamics in brane-worlds

2006 ◽  
Vol 2006 (11) ◽  
pp. 005-005 ◽  
Author(s):  
Eleftherios Papantonopoulos ◽  
Vassilios Zamarias
Keyword(s):  
Brane Worlds

scholarly journals Semi-transparent brane-worlds

2006 ◽  
Vol 2006 (05) ◽  
pp. 020-020 ◽  
Author(s):  
Zoltán Keresztes ◽  
Ibolya Képíró ◽  
László Á Gergely
Keyword(s):  
Brane Worlds

Neoclassic Cosmological Tests with QSOs

1997 ◽  
pp. 412-413
Author(s):  
G. Mathez ◽  
Y. Mellier ◽  
J.-P. Picat ◽  
L. Van Waerbeke
Keyword(s):  
Cosmological Tests

scholarly journals Brane worlds in gravity with auxiliary fields

2015 ◽  
Vol 75 (2) ◽  
Author(s):  
Bin Guo ◽  
Yu-Xiao Liu ◽  
Ke Yang
Keyword(s):  
Brane Worlds
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