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Cosmology of codimension-two braneworlds
We present a comprehensive study of the cosmological solutions of 6D braneworld models with azimuthal symmetry in the extra dimensions, moduli stabilization by flux or a bulk scalar field, and which contain at least one 3-brane that could be identified with our world. We emphasize an unusual propert...
Autores principales: | , , , |
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Lenguaje: | eng |
Publicado: |
2003
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1088/1126-6708/2003/06/048 http://cds.cern.ch/record/613187 |
_version_ | 1780900271245754368 |
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author | Cline, James M. Descheneau, Julie Giovannini, Massimo Vinet, Jeremie |
author_facet | Cline, James M. Descheneau, Julie Giovannini, Massimo Vinet, Jeremie |
author_sort | Cline, James M. |
collection | CERN |
description | We present a comprehensive study of the cosmological solutions of 6D braneworld models with azimuthal symmetry in the extra dimensions, moduli stabilization by flux or a bulk scalar field, and which contain at least one 3-brane that could be identified with our world. We emphasize an unusual property of these models: their expansion rate depends on the 3-brane tension either not at all, or in a nonstandard way, at odds with the expected dimensional reduction of these systems to 4D general relativity at low energies. Unlike other braneworld attempts to find a self-tuning solution to the cosmological constant problem, the apparent failure of decoupling in these models is not associated with the presence of unstabilized moduli. They could therefore provide a distinctive step toward understanding the smallness of the observed cosmological constant. |
id | cern-613187 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2003 |
record_format | invenio |
spelling | cern-6131872023-03-14T18:43:27Zdoi:10.1088/1126-6708/2003/06/048http://cds.cern.ch/record/613187engCline, James M.Descheneau, JulieGiovannini, MassimoVinet, JeremieCosmology of codimension-two braneworldsParticle Physics - TheoryWe present a comprehensive study of the cosmological solutions of 6D braneworld models with azimuthal symmetry in the extra dimensions, moduli stabilization by flux or a bulk scalar field, and which contain at least one 3-brane that could be identified with our world. We emphasize an unusual property of these models: their expansion rate depends on the 3-brane tension either not at all, or in a nonstandard way, at odds with the expected dimensional reduction of these systems to 4D general relativity at low energies. Unlike other braneworld attempts to find a self-tuning solution to the cosmological constant problem, the apparent failure of decoupling in these models is not associated with the presence of unstabilized moduli. They could therefore provide a distinctive step toward understanding the smallness of the observed cosmological constant.We present a comprehensive study of the cosmological solutions of 6D braneworld models with azimuthal symmetry in the extra dimensions, moduli stabilization by flux or a bulk scalar field, and which contain at least one 3-brane that could be identified with our world. We emphasize an unusual property of these models: their expansion rate depends on the 3-brane tension either not at all, or in a nonstandard way, at odds with the naive expected dimensional reduction of these systems to 4D general relativity at low energies. Unlike other braneworld attempts to find a self-tuning solution to the cosmological constant problem, the apparent failure of decoupling in these models is not associated with the presence of unstabilized moduli: rather it is due to automatic cancellation of the brane tension by the curvature induced by the brane. This provides some corroboration for the hope that these models provide a distinctive step toward understanding the smallness of the observed cosmological constant. However, we point out some challenges for obtaining realistic cosmology within this framework.hep-th/0304147CERN-TH-2003-089MCGILL-03-07CERN-TH-2003-089MCGILL-2003-07oai:cds.cern.ch:6131872003-04-16 |
spellingShingle | Particle Physics - Theory Cline, James M. Descheneau, Julie Giovannini, Massimo Vinet, Jeremie Cosmology of codimension-two braneworlds |
title | Cosmology of codimension-two braneworlds |
title_full | Cosmology of codimension-two braneworlds |
title_fullStr | Cosmology of codimension-two braneworlds |
title_full_unstemmed | Cosmology of codimension-two braneworlds |
title_short | Cosmology of codimension-two braneworlds |
title_sort | cosmology of codimension-two braneworlds |
topic | Particle Physics - Theory |
url | https://dx.doi.org/10.1088/1126-6708/2003/06/048 http://cds.cern.ch/record/613187 |
work_keys_str_mv | AT clinejamesm cosmologyofcodimensiontwobraneworlds AT descheneaujulie cosmologyofcodimensiontwobraneworlds AT giovanninimassimo cosmologyofcodimensiontwobraneworlds AT vinetjeremie cosmologyofcodimensiontwobraneworlds |