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Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole
We analyse the cosmology of a brane world model where a single brane carrying the standard model fields forms the boundary of a 5-dimensional AdS bulk (the Randall-Sundrum II scenario). We focus on the thermal radiation of bulk gravitons, the formation of the bulk black hole, and the holographic AdS...
Autores principales: | , |
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Lenguaje: | eng |
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2001
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Acceso en línea: | https://dx.doi.org/10.1016/S0550-3213(01)00286-3 http://cds.cern.ch/record/492129 |
_version_ | 1780897071336783872 |
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author | Hebecker, Arthur March-Russell, John |
author_facet | Hebecker, Arthur March-Russell, John |
author_sort | Hebecker, Arthur |
collection | CERN |
description | We analyse the cosmology of a brane world model where a single brane carrying the standard model fields forms the boundary of a 5-dimensional AdS bulk (the Randall-Sundrum II scenario). We focus on the thermal radiation of bulk gravitons, the formation of the bulk black hole, and the holographic AdS/CFT definition of the RSII theory. Our detailed calculation of bulk radiation reduces previous estimates to a phenomenologically acceptable, although potentially visible level. In late cosmology, in which the Friedmann equation depends linearly on the energy density \rho, only about 1% of energy density is lost to the black hole or, equivalently, to the `dark radiation' (\Omega_{d,N} \simeq 0.01 at nucleosynthesis). The preceding, unconventional \rho^2 period can produce up to 10% dark radiation (\Omega_{d,N} <\sim 0.1). The AdS/CFT correspondence provides an equivalent description of late RSII cosmology. We show how the AdS/CFT formulation can reproduce the \rho^2 correction to the standard treatment at low matter density. However, the 4-dimensional effective theory of CFT + gravity breaks down due to higher curvature terms for energy densities where \rho^2 behaviour in the Friedmann equation is usually predicted. We emphasize that, in going beyond this energy density, the microscopic formulation of the theory becomes essential. For example, the pure AdS_5 and string-motivated AdS_5\timesS^5 definitions differ in their cosmological implications. |
id | cern-492129 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2001 |
record_format | invenio |
spelling | cern-4921292023-10-04T06:01:53Zdoi:10.1016/S0550-3213(01)00286-3http://cds.cern.ch/record/492129engHebecker, ArthurMarch-Russell, JohnRandall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black HoleParticle Physics - PhenomenologyWe analyse the cosmology of a brane world model where a single brane carrying the standard model fields forms the boundary of a 5-dimensional AdS bulk (the Randall-Sundrum II scenario). We focus on the thermal radiation of bulk gravitons, the formation of the bulk black hole, and the holographic AdS/CFT definition of the RSII theory. Our detailed calculation of bulk radiation reduces previous estimates to a phenomenologically acceptable, although potentially visible level. In late cosmology, in which the Friedmann equation depends linearly on the energy density \rho, only about 1% of energy density is lost to the black hole or, equivalently, to the `dark radiation' (\Omega_{d,N} \simeq 0.01 at nucleosynthesis). The preceding, unconventional \rho^2 period can produce up to 10% dark radiation (\Omega_{d,N} <\sim 0.1). The AdS/CFT correspondence provides an equivalent description of late RSII cosmology. We show how the AdS/CFT formulation can reproduce the \rho^2 correction to the standard treatment at low matter density. However, the 4-dimensional effective theory of CFT + gravity breaks down due to higher curvature terms for energy densities where \rho^2 behaviour in the Friedmann equation is usually predicted. We emphasize that, in going beyond this energy density, the microscopic formulation of the theory becomes essential. For example, the pure AdS_5 and string-motivated AdS_5\timesS^5 definitions differ in their cosmological implications.We analyse the cosmology of a brane world model where a single brane carrying the standard model fields forms the boundary of a 5-dimensional AdS bulk (the Randall-Sundrum II scenario). We focus on the thermal radiation of bulk gravitons, the formation of the bulk black hole, and the holographic AdS/CFT definition of the RSII theory. Our detailed calculation of bulk radiation reduces previous estimates to a phenomenologically acceptable, although potentially visible level. In late cosmology, in which the Friedmann equation depends linearly on the energy density \rho, only about 0.5% of energy density is lost to the black hole or, equivalently, to the `dark radiation' (\Omega_{d,N} \simeq 0.005 at nucleosynthesis). The preceding, unconventional \rho^2 period can produce up to 5% dark radiation (\Omega_{d,N} <\sim 0.05). The AdS/CFT correspondence provides an equivalent description of late RSII cosmology. We show how the AdS/CFT formulation can reproduce the \rho^2 correction to the standard treatment at low matter density. However, the 4-dimensional effective theory of CFT + gravity breaks down due to higher curvature terms for energy densities where \rho^2 behaviour in the Friedmann equation is usually predicted. We emphasize that, in going beyond this energy density, the microscopic formulation of the theory becomes essential. For example, the pure AdS_5 and string-motivated AdS_5\timesS^5 definitions differ in their cosmological implications.We analyse the cosmology of a brane world model where a single brane carrying the standard model fields forms the boundary of a 5-dimensional AdS bulk (the Randall–Sundrum II scenario). We focus on the thermal radiation of bulk gravitons, the formation of the bulk black hole, and the holographic AdS/CFT definition of the RSII theory. Our detailed calculation of bulk radiation reduces previous estimates to a phenomenologically acceptable, although potentially visible level. In late cosmology, in which the Friedmann equation depends linearly on the energy density ρ , only about 1% of energy density is lost to the black hole or, equivalently, to the ‘dark radiation’ ( Ω d,N ≃0.01 at nucleosynthesis). The preceding, unconventional ρ 2 period can produce up to 10% dark radiation ( Ω d,N ≲0.1 ). The AdS/CFT correspondence provides an equivalent description of late RSII cosmology. We show how the AdS/CFT formulation can reproduce the ρ 2 correction to the standard treatment at low matter density. However, the 4-dimensional effective theory of CFT + gravity breaks down due to higher curvature terms for energy densities where ρ 2 behaviour in the Friedmann equation is usually predicted. We emphasize that, in going beyond this energy density, the microscopic formulation of the theory becomes essential. For example, the pure AdS 5 and string-motivated AdS 5 ×S 5 definitions differ in their cosmological implications.hep-ph/0103214CERN-TH-2001-078CERN-TH-2001-078oai:cds.cern.ch:4921292001-03-20 |
spellingShingle | Particle Physics - Phenomenology Hebecker, Arthur March-Russell, John Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole |
title | Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole |
title_full | Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole |
title_fullStr | Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole |
title_full_unstemmed | Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole |
title_short | Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole |
title_sort | randall-sundrum ii cosmology, ads/cft, and the bulk black hole |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/S0550-3213(01)00286-3 http://cds.cern.ch/record/492129 |
work_keys_str_mv | AT hebeckerarthur randallsundrumiicosmologyadscftandthebulkblackhole AT marchrusselljohn randallsundrumiicosmologyadscftandthebulkblackhole |