Journal article 950 views
Universal aspects of gravity localized on thick branes
Nuclear Physics B, Volume: "B581", Issue: 1-2, Pages: 309 - 338
Swansea University Author:
Timothy Hollowood
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DOI (Published version): 10.1016/S0550-3213(00)00271-6
Abstract
We study gravity in backgrounds that are smooth generalizations of the Randall-Sundrum model, with and without scalar fields. These generalizations include three-branes in higher dimensional spaces which are not necessarily Anti-de Sitter far from the branes, intersecting brane configurations and co...
| Published in: | Nuclear Physics B |
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| ISSN: | 05503213 |
| Published: |
2000
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa28556 |
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| Abstract: |
We study gravity in backgrounds that are smooth generalizations of the Randall-Sundrum model, with and without scalar fields. These generalizations include three-branes in higher dimensional spaces which are not necessarily Anti-de Sitter far from the branes, intersecting brane configurations and configurations involving negative tension branes. We show that under certain mild assumptions there is a universal equation for the gravitational fluctuations. We study both the graviton ground state and the continuum of Kaluza-Klein modes and we find that the four-dimensional gravitational mode is localized precisely when the effects of the continuum modes decouple at distances larger than the fundamental Planck scale. The decoupling is contingent only on the long-range behaviour of the metric from the brane and we find a universal form for the corrections to Newton's Law. We also comment on the possible contribution of resonant modes. Given this, we find general classes of metrics which maintain localized four-dimensional gravity. We find that three-brane metrics in five dimensions can arise from a single scalar field source, and we rederive the BPS type conditions without any a priori assumptions regarding the form of the scalar potential. We also show that a single scalar field cannot produce conformally-flat locally intersecting brane configurations or a p-brane in greater than |
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| College: |
Faculty of Science and Engineering |
| Issue: |
1-2 |
| Start Page: |
309 |
| End Page: |
338 |