Radion and Large Scale Anisotropy on the Brane

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概要

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• We investigate the effect of displacements of the brane in the extra dimension. The S_1/Z_2 compactified 5D anti-de Sitter spacetime bounded by positive and negative tension branes is considered. The relative displacement of a brane is called a "radion". We study displacements caused by the "fluctuation" of a brane without the matter energy-momentum tensor on the brane. We derive the solution for a homogeneous fluctuation of an expanding brane. It is found that the homogeneous brane fluctuation interacts with an anisotropic bulk perturbation and thereby affects the anisotropy of the brane. By determining the bulk anisotropic perturbation, we calculate the homogeneous metric perturbations on the positive tension brane and find a large-scale CMB anisotropy. An interesting finding is that the radion contributes to the CMB anisotropy if the distance between the two branes is time dependent. The observational consequences of these effects are discussed.

• 理論物理学刊行会の論文
• 2003-03-28

著者

• Koyama K

  Graduate School Of Human And Environment Studies Kyoto University:(present Address)department Of Phy

• KOYAMA Kazuya

  Graduate School of Human and Environment Studies, Kyoto University

• Koyama Kazuya

  Department Of Physics The University Of Tokyo

• Koyama Kazuya

  Graduate School Of Human And Environment Studies Kyoto University

• KOYAMA Kazuya

  Graduate School of Human and Environment Studies, Kyoto University:(Present address)Department of Physics, The University of Tokyo

関連論文

• CMB anisotoropies in Randall-Sundrum brane worlds (Extra dimensionsとBraneworld--素粒子理論、現象論、宇宙論)
• Radion and Large Scale Anisotropy on the Brane
• Cosmological Perturbations in the Brane World : Brane View vs Bulk View
• Cosmological Perturbations in the Brane World : Brane View vs Bulk View
• Cosmology Based on Horava-Witten Theory
• Cosmology Based on Horava-Witten Theory
• Radion and Large Scale Anisotropy on the Brane

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