Bulk matters on symmetric and asymmetric de Sitter thick branes

doi:10.1088/1475-7516/2009/02/003

	Bulk matters on symmetric and asymmetric de Sitter thick branes
	Liu, Yu-Xiao 1; Zhao, Zhen-Hua 1,2; Wei, Shao-Wen 1; Duan, Yi-Shi 1
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2009-02-01
页码	27
关键词	extra dimensions Cosmic strings domain walls monopoles
ISSN号	1475-7516
DOI	10.1088/1475-7516/2009/02/003
英文摘要	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 Schrodinger equations, we investigate the localization and mass spectra of various bulk matter fields on the symmetric and asymmetric dS thick branes. For spin 0 scalars and spin 1 vectors, the potentials of KK modes in the corresponding Schrodinger equations are the modified Poschl-Teller potentials, and there exist a mass gap and a series of continuous spectrum. 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, 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, two types of kink-fermion couplings are investigated in detail. For the usual Yukawa coupling eta(Psi) over bar phi Psi, there exists no mass gap but a continuous gapless spectrum of KK states. For the scalar-fermion coupling eta(Psi) over bar sin(phi/phi(0)) cos(-delta)(phi/phi(0))Psi with a positive coupling constant eta, there exist some discrete bound KK modes and a series of continuous ones. The total number of bound states increases with the coupling constant eta. For the case of the symmetric dS brane and positive eta, there are N-L(N-L >= 1) left chiral fermion bound states (including zero mode and massive KK modes) and N-L - 1 right chiral fermion bound states (including only massive KK modes). For the asymmetric dS brane scenario, the asymmetric factor a reduces the number of the bound fermion KK modes. For large enough a, there would not be any right chiral fermion bound mode, but at least one left chiral fermion zero mode.
资助项目	National Natural Science Foundation of China[10705013] ; Doctor Education Fund of Educational Department of China[20070730055] ; Fundamental Research Fund for Physics and Mathematics of Lanzhou University[Lzu07002]
WOS关键词	FERMIONIC ZERO MODES ; COSMOLOGICAL CONSTANT PROBLEM ; STRING-LIKE DEFECT ; DOMAIN-WALLS ; EXTRA DIMENSION ; GRAVITY ; LOCALIZATION ; WORLDS ; SPACETIMES ; MILLIMETER
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000263824100003
资助机构	National Natural Science Foundation of China ; Doctor Education Fund of Educational Department of China ; Fundamental Research Fund for Physics and Mathematics of Lanzhou University
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/30552]
专题	中国科学院近代物理研究所
通讯作者	Liu, Yu-Xiao
作者单位	1.Lanzhou Univ, Inst Theoret Phys, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yu-Xiao,Zhao, Zhen-Hua,Wei, Shao-Wen,et al. Bulk matters on symmetric and asymmetric de Sitter thick branes[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009:27.
APA	Liu, Yu-Xiao,Zhao, Zhen-Hua,Wei, Shao-Wen,&Duan, Yi-Shi.(2009).Bulk matters on symmetric and asymmetric de Sitter thick branes.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,27.
MLA	Liu, Yu-Xiao,et al."Bulk matters on symmetric and asymmetric de Sitter thick branes".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2009):27.