New Fermions at the LHC and Mass of the Higgs Boson

Abstract

Unification at M_{GUT}\sim 3\times 10^{16} GeV of the three Standard Model (SM) gauge couplings can be achieved by postulating the existence of a pair of vectorlike fermions carrying SM charges and masses of order 300 GeV -- 1 TeV. The presence of these fermions significantly modifies the vacuum stability and perturbativity bounds on the mass of the SM Higgs boson. The new vacuum stability bound in this extended SM is estimated to be 117 GeV, to be compared with the SM prediction of about 128 GeV. An upper bound of 190 GeV is obtained based on perturbativity arguments. The impact on these predictions of type I seesaw physics is also discussed. The discovery of a relatively `light' Higgs boson with mass \sim 117 GeV could signal the presence of new vectorlike fermions within reach of the LHC.

14 pages, 4 figures

References in corpus (11)

• Proton stability in grand unified theories, in strings, and in branes
• Black Hole Bound on the Number of Species and Quantum Gravity at LHC
• CP Violation and Neutrino Oscillations
• Cosmological implications of the Higgs mass measurement
• The Probable Fate of the Standard Model
• Two loop finiteness of Higgs mass and potential in the gauge-Higgs unification
• Higgs Mass Bounds, Type II SeeSaw and LHC
• Effective theoretical approach of Gauge-Higgs unification model and its phenomenological applications
• Higgs Boson Mass Bounds in the Standard Model with Type III and Type I Seesaw
• Higgs Boson Mass From Gauge-Higgs Unification
• Window For Higgs Boson Mass From Gauge-Higgs Unification

Cited by in corpus (26)

• Model-Independent Searches for New Quarks at the LHC
• Interpretation of the diphoton excess at CMS and ATLAS
• Vector-like Singlet Quarks: a Roadmap
• LHC-scale left-right symmetry and unification
• A natural $Z^{\prime }$-portal Majorana dark matter in alternative U(1) extended Standard Model
• SU(5)$\times$U(1)${}_X$ grand unification with minimal seesaw and $Z^{\prime }$-portal dark matter
• 125 GeV Higgs, Type III Seesaw and Gauge-Higgs Unification
• Pseudo-Goldstone Dark Matter in $SO(10)$
• Gravitational waves from breaking of an extra $U(1)$ in $SO(10)$ grand unification
• The Minimal GUT with Inflaton and Dark Matter Unification
• Unification with Vector-like fermions and signals at LHC
• Gauge coupling unification in a classically scale invariant model
• SMART U(1)${}_X$ $-$ Standard Model with Axion, Right handed neutrinos, Two Higgs doublets and U(1)${}_X$ gauge symmetry
• Precision Gauge Unification from Extra Yukawa Couplings
• The hidden sector variations in the $\mathcal{N}=1$ supersymmetric three-family Pati-Salam models from intersecting D6-branes
• Natural Higgs Inflation, Gauge Coupling Unification, and Neutrino Masses
• Road map through the desert: unification with vector-like fermions
• An SU(6) GUT Origin of the TeV-Scale Vector-like Particles Associated with the 750 GeV Diphoton Resonance
• An asymptotically safe SU(5) GUT
• Minimal anomaly-free chiral fermion sets and gauge coupling unification
• String-scale Gauge Coupling Relations in the Supersymmetric Pati-Salam Models from Intersecting D6-branes
• Alternative Renormalizable Minimal SO(10) GUTs and Data Fitting
• Distinguishing Signatures of top-and bottom-type heavy vectorlike quarks at the LHC
• Higgs Boson Mass Bounds in Seesaw Extended Standard Model with Non-Minimal Gravitational Coupling
• Road map through the desert with scalars
• Inflation, Proton Decay, and Higgs-Portal Dark Matter in $SO(10)\times U(1{)}_{\psi }$