A Little Solution to the Little Hierarchy Problem: A Vector-like Generation
High Energy Physics - Phenomenology
2014-11-20 v2
Abstract
We present a simple solution to the little hierarchy problem in the MSSM: a vector-like fourth generation. With O(1) Yukawa couplings for the new quarks, the Higgs mass can naturally be above 114 GeV. Unlike a chiral fourth generation, a vector-like generation can solve the little hierarchy problem while remaining consistent with precision electroweak and direct production constraints, and maintaining the success of the grand unified framework. The new quarks are predicted to lie between ~ 300 - 600 GeV and will thus be discovered or ruled out at the LHC. This scenario suggests exploration of several novel collider signatures.
Cite
@article{arxiv.0910.3020,
title = {A Little Solution to the Little Hierarchy Problem: A Vector-like Generation},
author = {Peter W. Graham and Ahmed Ismail and Surjeet Rajendran and Prashant Saraswat},
journal= {arXiv preprint arXiv:0910.3020},
year = {2014}
}
Comments
19 pages, 3 figures. v2: Section 3 modified, version to appear in PRD.