2003/02/11 by David Langlois, Misao Sasaki
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.68.064012
published as Phys.Rev.D68:064012,2003 · 14 pages; 5 figures
arxiv created 2003/02/11 · openalex publication_date 2003/09/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider a brane scenario with a massive scalar field in the five-dimensional bulk. We study the scalar states that are localized on the brane, which is assumed to be a de Sitter brane. These localized scalar modes are massive in general, their effective four-dimensional mass depending on the mass of the five-dimensional scalar field, on the Hubble parameter in the brane and on the coupling between the brane tension and the bulk scalar field. We then introduce a purely four-dimensional approach based on an effective potential for the projection of the scalar field in the brane, and discuss its regime of validity. Finally, we explore the quasilocalized scalar states, which have a nonzero width that quantifies their probability of tunneling from the brane into the bulk.