Exophobic quasi-realistic heterotic string vacua
Exophobic quasi-realistic heterotic string vacua
复制标题
疏散准现实异种异质弦真空
DOI:
10.1016/j.physletb.2009.12.033
复制
发表时间:
2010
影响因子:
4.4
通讯作者:
Assel B
中科院分区:
文献类型:
--
作者:
Assel B
We demonstrate the existence of heterotic string vacua that are free of massless exotic fields. The need to break the non-Abelian GUT symmetries in k=1 heterotic string models by Wilson lines, while preserving the GUT embedding of the weak hypercharge and the GUT prediction sin2θw(MGUT)=3/8, necessarily implies that the models contain states with fractional electric charge. Such states are severely restricted by observations, and must be confined or sufficiently massive and diluted. We construct the first quasi-realistic heterotic string models in which the exotic states do not appear in the massless spectrum, and only exist, as they must, in the massive spectrum. The SO(10) GUT symmetry is broken to the Pati–Salam subgroup. Our PS heterotic string models contain adequate Higgs representations to break the GUT and electroweak symmetry, as well as colour Higgs triplets that can be used for the missing partner mechanism. By statistically sampling the space of Pati–Salam vacua we demonstrate the abundance of quasi-realistic three generation models that are completely free of massless exotics, rendering it plausible that obtaining realistic Yukawa couplings may be possible in this space of models.
登录
查看更多内容
DOI:
10.1016/j.nuclphysb.2009.12.012
发表时间:
2009-09
期刊:
Nuclear Physics
影响因子:
--
作者:
E. Kiritsis;M. Lennek;Bert Schellekens
通讯作者:
E. Kiritsis;M. Lennek;Bert Schellekens
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
G. Athanasiu;J. Atick;M. Dine;W. Fischler
通讯作者:
W. Fischler
DOI:
10.1016/s0550-3213(99)00135-2
发表时间:
1999
期刊:
arXiv: High Energy Physics - Theory
影响因子:
--
作者:
A. Gregori;C. Kounnas;J. Rizos
通讯作者:
J. Rizos
DOI:
10.1016/j.nuclphysb.2007.03.029
发表时间:
2006
期刊:
Nuclear Physics
影响因子:
--
作者:
A. Faraggi;C. Kounnas;J. Rizos
通讯作者:
J. Rizos
DOI:
10.1016/0550-3213(87)90372-5
发表时间:
1987
期刊:
Nuclear Physics
影响因子:
--
作者:
I. Antoniadis;C. Bachas;C. Kounnas
通讯作者:
C. Kounnas