New localization mechanism of fermions on braneworlds
Abstract
It is known that by introducing the Yukawa coupling between the fermion and the background scalar field, a bulk spin-half fermion can be localized on general Randall-Sundrum braneworlds generated by a kinklike background scalar. However, this localization mechanism does not work anymore for Randall-Sundrum braneworlds generated by a scalar whose configuration is an even function of the extra dimension. In this paper, we present a new localization mechanism for spin-half fermions for such a class of braneworld models, in which extra dimension has the topology . By two examples, it is shown that the new localization mechanism produces interesting results. In the first model with the brane generated by two scalars, the zero mode of the left-handed fermion is localized on the brane and there is a mass gap between the fermion zero mode and excited KK modes. In the second model with the brane generated by a dilaton scalar, the zero mode of the left- or right-chiral fermion can be localized on the brane and there is no mass gap.
Keywords
Cite
@article{arxiv.1312.4145,
title = {New localization mechanism of fermions on braneworlds},
author = {Yu-Xiao Liu and Zeng-Guang Xu and Feng-Wei Chen and Shao-Wen Wei},
journal= {arXiv preprint arXiv:1312.4145},
year = {2014}
}
Comments
8 pages, 2 figures