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4 papers · 2 filters
Moduli effective action in warped brane world compactifications
Jaume Garriga, Oriol Pujolas, Takahiro Tanaka
We consider a class of 5-D brane-world solutions with a power-law warp factor , and bulk dilaton with profile , where is the proper distance…
Stealth Branes
Ruben Cordero, Alexander Vilenkin
We discuss the brane world model of Dvali, Gabadadze and Porrati in which branes evolve in an infinite bulk and the brane curvature term is added to the action. If Z_2 symmetry bet…
Field theory models for variable cosmological constant
Gia Dvali, Alexander Vilenkin
Anthropic solutions to the cosmological constant problem require seemingly unnatural scalar field potentials with a very small slope or domain walls (branes) with a very small coup…
Gravitating global defects: the gravitational field and compactification
Itsaso Olasagasti
We give a prescription to add the gravitational field of a global topological defect to a solution of Einstein's equations in an arbitrary number of dimensions. We only demand that…