Cosmological constant problems and their solutions

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dc.creatorVilenkin, Alexander
dc.date2001-06-11
dc.date2001-06-21
dc.date.accessioned2026-07-07T08:10:53Z
dc.date.available2026-07-07T08:10:53Z
dc.descriptionThere are now two cosmological constant problems: (i) why the vacuum energy is so small and (ii) why it comes to dominate at about the epoch of galaxy formation. Anthropic selection appears to be the only approach that can naturally resolve both problems. The challenge presented by this approach is that it requires scalar fields with extremely flat potentials or four-form fields coupled to branes with an extremely small charge. Some recent suggestions are reviewed on how such features can arise in particle physics models.
dc.description19 pages, revtex. Based on talks given at ``The dark Universe'' (Space Telescope Institute) and PASCOS-2001 in April 2001
dc.identifierhttps://arxiv.org/abs/hep-th/0106083
dc.identifierhttp://arxiv.org/abs/hep-th/0106083
dc.identifierin "The Dark Universe: Matter, Energy, and Gravity", ed. by M. Livio (Cambridge University Press, Cambridge 2003)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/131952
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCosmological constant problems and their solutions
dc.typetext

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