Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-01-07
JCAP 02 (2009) 003
Physics
High Energy Physics
High Energy Physics - Theory
28 pages, 28 figures
Scientific paper
10.1088/1475-7516/2009/02/003
An asymmetric thick domain wall solution with de Sitter ($dS$) expansion in five dimensions can be constructed from a symmetric one by using a same scalar (kink) with different potentials. In this paper, by presenting the mass-independent potentials of Kaluza--Klein (KK) modes in the corresponding Schr\"{o}dinger equations, we investigate the localization and mass spectra of various bulk matter fields on the symmetric and asymmetric $dS$ thick branes. It is shown that the spectrum of scalar KK modes on the symmetric $dS$ brane contains only one bound mode (the massless mode). However, for the asymmetric $dS$ brane with a large asymmetric factor $a$, there are two bound scalar KK modes: a zero mode and a massive mode. For spin 1 vectors, the spectra of KK modes on both $dS$ branes consist of a bound massless mode and a set of continuous ones, i.e., the asymmetric factor does not change the number of the bound vector KK modes. For spin 1/2 fermions with the scalar-fermion coupling $\eta\bar\Psi \sin(\phi/\phi_0)\cos^{-\delta}(\phi/\phi_0)\Psi$, there exist some discrete bound KK modes and a series of continuous ones. The asymmetric factor $a$ reduces the number of the bound fermion KK modes.
Duan Yi-Shi
Liu Yu-Xiao
Wei Shao-Wen
Zhao Zhen-Hua
No associations
LandOfFree
Bulk Matters on Symmetric and Asymmetric de Sitter Thick Branes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Bulk Matters on Symmetric and Asymmetric de Sitter Thick Branes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bulk Matters on Symmetric and Asymmetric de Sitter Thick Branes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-720321