Raising the Higgs Mass in Supersymmetry with t-t' Mixing
arXiv:1405.4116 · doi:10.1103/PhysRevD.90.035024
Abstract
In this article we propose a new strategy to address the Little Hierarchy problem. We show that the addition of a fourth generation with vector-like quarks to the minimal supersymmetric standard model (MSSM) can raise the predicted value of the physical Higgs mass by mixing with the top sector. The mixing requires a larger top quark Yukawa coupling (by up to ) to produce the same top mass. Since loop corrections to go as , this will in turn increase the predicted value of the physical Higgs mass, a point not previously emphasized in the literature. In the presence of mixing, for A-terms and soft masses around 900 GeV, a Higgs mass of 125 GeV can be generated while retaining perturbativity of the gauge couplings, evading constraints from electroweak precision measurements (EWPM) and recent LHC searches, and pushing the Landau pole for the top Yukawa above the GUT scale. Soft masses can be as low as 800 GeV in parts of parameter space with a Landau pole at GeV. However, the Landau pole can still be pushed above the GUT scale if one sacrifices perturbative unification by adding fields in a + representation. With a ratio of weak-scale vector masses , soft masses may be slightly below GeV. The model predicts new quarks and squarks with masses GeV. We briefly discuss potential paths for discovery or exclusion at the LHC.
arXiv comment22 pages, 12 figures, plus 12 pages of appendices. 2nd version fixes minor typos and clarifies wording on one small point. 3rd version makes minor changes to fit version as published in Physics Review D
References in corpus (43)
- Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
- Electroweak symmetry breaking from dimensional deconstruction
- The Littlest Higgs
- Two-Loop Renormalization Group Equations for Soft Supersymmetry-Breaking Couplings
- The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
- A handbook of vector-like quarks: mixing and single production
- Folded Supersymmetry and the LEP Paradox
- A Solution to the Supersymmetric Fine-Tuning Problem within the MSSM
- Extra vector-like matter and the lightest Higgs scalar boson mass in low-energy supersymmetry
- The Higgs Mass Bound in Gauge Extensions of the Minimal Supersymmetric Standard Model
- The Minimal Supersymmetric Fat Higgs Model
- Stealth Supersymmetry
- Little SUSY hierarchy in mixed modulus-anomaly mediation
- Inclusive search for a vector-like T quark with charge 2/3 in pp collisions at sqrt(s) = 8 TeV
- Higgs Physics as a Window Beyond the MSSM (BMSSM)
- Low-scale supersymmetry breaking: effective description, electroweak breaking and phenomenology
- Twin SUSY
- A Supersymmetric Twin Higgs
- Living Dangerously with Low-Energy Supersymmetry
- Gauge unification and the supersymmetric light Higgs mass
- The MSSM fine tuning problem: a way out
- Supersoft Supersymmetry is Super-Safe
- Displaced Supersymmetry
- D-Terms, Unification, and the Higgs Mass
- A Little Solution to the Little Hierarchy Problem: A Vector-like Generation
- The New Fat Higgs: Slimmer and More Attractive
- Relaxed fine-tuning in models with non-universal gaugino masses
- TeV Scale Mirage Mediation and Natural Little SUSY Hierarchy
- A Fat Higgs with a Fat Top
- Radiatively Generated Maximal Mixing Scenario for the Higgs Mass and the Least Fine Tuned Minimal Supersymmetric Standard Model
- Relaxing the Upper Bound on the Mass of the Lightest Supersymmetric Higgs Boson
- Reduced Fine-Tuning in Supersymmetry with R-parity violation
- A Minimally Fine-Tuned Supersymmetric Standard Model
- Implications of gauge-mediated supersymmetry breaking with vector-like quarks and a ~125 GeV Higgs boson
- Virtual effects of light gauginos and higgsinos: a precision electroweak analysis of split supersymmetry
- A Solution for Little Hierarchy Problem and b --> s gamma
- Unusual Higgs or Supersymmetry from Natural Electroweak Symmetry Breaking
- Amelioration of Little Hierarchy Problem in SU(4)_c x SU(2)_L x SU(2)_R
- SUSY without the Little Hierarchy
- TeV scale partial mirage unification and neutralino dark matter
- Supersymmetry in the shadow of photini
- Landscape of Little Hierarchy
- No-Scale Solution to Little Hierarchy