Volume 87, Number 4, August 2009
|Number of page(s)||6|
|Published online||08 September 2009|
Localization and mass spectrum of spin-1/2 fermionic field on a thick brane with Poincaré symmetry
Institute of Theoretical Physics, Lanzhou University - Lanzhou, 730000, PRC
Corresponding author: email@example.com
Accepted: 12 August 2009
We investigate localization and mass spectrum of spin- fermionic field on a scalar thick brane configuration with Poincaré symmetry, which arises in a 5-dimensional theory of gravity coupling to a self-interacting scalar field in a regular Riemannian manifold. It is shown that, in the case of no Yukawa coupling of scalar-fermion, there is no existence of localized massless zero mode for both left and right chiral fermions. By introducing appropriate coupling, we can obtain the localized modes as well as a continuous spectrum of massive Kaluza-Klein (KK) modes for left and right chiral fermions. It is found that there exists a mass gap between the massless zero mode and the excited modes for left chiral fermions or right chiral fermions. The total number of bound states is determined by the Yukawa coupling constant and the parameter of the thick brane solution. Depending on the sign of the coupling constant, only one category of zero modes, namely, either the left or right chiral zero mode can be trapped on the brane.
PACS: 04.50.-h – Higher-dimensional gravity and other theories of gravity / 11.25.-w – Strings and branes / 11.10.Kk – Field theories in dimensions other than four
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.