Bulk Matters on Symmetric and Asymmetric de Sitter Thick Branes
| dc.creator | Liu, Yu-Xiao | |
| dc.creator | Zhao, Zhen-Hua | |
| dc.creator | Wei, Shao-Wen | |
| dc.creator | Duan, Yi-Shi | |
| dc.date | 2009-01-07 | |
| dc.date | 2009-02-03 | |
| dc.date.accessioned | 2026-07-07T12:36:46Z | |
| dc.date.available | 2026-07-07T12:36:46Z | |
| dc.description | 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 Schrödinger 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 $η\barΨ\sin(ϕ/ϕ_0)\cos^{-δ}(ϕ/ϕ_0)Ψ$, 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. | |
| dc.description | 28 pages, 28 figures | |
| dc.identifier | https://arxiv.org/abs/0901.0782 | |
| dc.identifier | http://arxiv.org/abs/0901.0782 | |
| dc.identifier | JCAP 02 (2009) 003 | |
| dc.identifier | doi:10.1088/1475-7516/2009/02/003 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/218208 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Bulk Matters on Symmetric and Asymmetric de Sitter Thick Branes | |
| dc.type | text |