The cosmological constant problem from a brane-world perspective | Zendy

Stefan Förste | Zendy; Zygmunt Lalak | Zendy; Stéphane Lavignac | Zendy; Hans Peter Nilles | Zendy

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The cosmological constant problem from a brane-world perspective

Author(s) -

Stefan Förste,

Zygmunt Lalak,

Stéphane Lavignac,

Hans Peter Nilles

Publication year - 2000

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2000/09/034

Subject(s) - cosmological constant , physics , brane , brane cosmology , gravitational singularity , cosmological constant problem , constant (computer programming) , theoretical physics , curvature , scalar field , scalar (mathematics) , classical mechanics , mathematical physics , cosmology , quantum mechanics , dark energy , geometry , mathematics , computer science , programming language

We point out several subtleties arising in brane-world scenarios ofcosmological constant cancellation. We show that solutions with curvaturesingularities are inconsistent, unless the contribution to the effectivefour-dimentional cosmological constant of the physics that resolves thesingularities is fine-tuned. This holds for both flat and curved branes.Irrespective of this problem, we then study an isolated class of flat solutionsin models where a bulk scalar field with a vanishing potential couples to a3-brane. We give an example where the introduction of a bulk scalar potentialresults in a nonzero cosmological constant. Finally we comment on the stabilityof classical solutions of the brane system with respect to quantum corrections.Comment: 20 pages, LaTeX; minor corrections and a reference adde

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