Constructing 5d orbifold grand unified theories from heterotic strings
Abstract
A three-generation Pati-Salam model is constructed by compactifying the heterotic string on a particular T^6/Z_6 Abelian symmetric orbifold with two discrete Wilson lines. The compactified space is taken to be the Lie algebra lattice G_2+SU(3)+SO(4). When one dimension of the SO(4) lattice is large compared to the string scale, this model reproduces many features of a 5d SO(10) grand unified theory compactified on an S^1/Z_2 orbifold. (Of course, with two large extra dimensions we can obtain a 6d SO(10) grand unified theory.) We identify the orbifold parities and other ingredients of the orbifold grand unified theories in the string model. Our construction provides a UV completion of orbifold grand unified theories, and gives new insights into both field theoretical and string theoretical constructions.
Cite
@article{arxiv.hep-ph/0403065,
title = {Constructing 5d orbifold grand unified theories from heterotic strings},
author = {Tatsuo Kobayashi and Stuart Raby and Ren-Jie Zhang},
journal= {arXiv preprint arXiv:hep-ph/0403065},
year = {2008}
}
Comments
15 pages, 3 figures, 1 table, revtex4