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Little solution to the little hierarchy problem: A vectorlike generation
Physical Review D
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 ~ 300doi:10.1103/physrevd.81.055016 fatcat:jko7ln5j3fgn5or4akgmb4gxhq