Extra vectorlike matter and the lightest Higgs scalar boson mass in low-energy supersymmetry
By S. P. Martin. 2009
224 citations recorded by the source corpus.
The lightest Higgs scalar boson mass in supersymmetry can be raised significantly by extra vectorlike quark and lepton supermultiplets with large Yukawa couplings but dominantly electroweak-singlet masses. I consider models of this type that maintain perturbative gauge coupling unification. The impact of the new particles on precision electroweak observables is found to be moderate, with the fit to $Z$-pole data as good or better than that of the standard model even if the new Yukawa couplings are as large as their fixed-point values and the extra vectorlike quark masses are as light as 400 GeV. I study the size of corrections to the lightest Higgs boson mass, taking into account the fixed-point behavior of the scalar trilinear couplings. I also discuss the decay branching ratios of the lightest new quarks and leptons and general features of the resulting collider signatures.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/45f302a5adf33b631b9473e5509262b46007e6eb
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Citations in the corpus
- Vector boson fusion at multi-TeV muon colliders (2020, unknown): “In addition, vector-like quarks (VLQ) offer viable, non-supersymmetric solutions to the Higgs mass hierarchy and dynamical EWSB [165–167].”
- The State of Supersymmetry after Run I of the LHC (2013, background): “large, although now distributed among many elds. Imagine adding doublets ; and singlets ˚;˚ with couplings W= M + M ˚˚˚+ kH u ˚+ :::+ soft terms(16) This is like adding extra top multiplets, and [48, 49] m2 h= N c 4ˇ2 k4v2 sin4 log m2 S=m 2 F + ::: (17) 35 (where here m S and m F are the scalar and ”