Road map through the desert: unification with vector-like fermions

Abstract

In light of null results from New Physics searches at the LHC, we look at unification of the gauge couplings as a model-building principle. As a first step, we consider extensions of the Standard Model with vector-like fermions. We present a comprehensive list of spectra that feature fermions in two distinct $SU(3{)}_C\times SU(2{)}_L\times U(1{)}_Y$ representations, in which precise gauge coupling unification is achieved. We derive upper and lower limits on vector-like masses from proton decay measurements, running of the strong gauge coupling, heavy stable charged particle searches, and electroweak precision tests. We demonstrate that due to a particular hierarchy among the mass parameters required by the unification condition, complementarity of various experimental strategies allows us to probe many of the successful scenarios up to at least 10 TeV.

25 pages, 4 figures, 6 tables; references added; matches the version published in JHEP

References in corpus (41)

• Investigating the near-criticality of the Higgs boson
• Supersymmetric Unification Without Low Energy Supersymmetry And Signatures for Fine-Tuning at the LHC
• Electroweak symmetry breaking after LEP1 and LEP2
• Hyper-Kamiokande Design Report
• Proton stability in grand unified theories, in strings, and in branes
• Uncertainties in Coupling Constant Unification
• The Minimal Set of Electroweak Precision Parameters
• Beautiful Mirrors and Precision Electroweak Data
• Search for Proton Decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ in 0.31 megaton$\cdot$years exposure of the Super-Kamiokande Water Cherenkov Detector
• Energy helps accuracy: electroweak precision tests at hadron colliders
• Unification without supersymmetry: neutrino mass, proton decay and light leptoquarks
• Search for long-lived charged particles in proton-proton collisions at sqrt(s) = 13 TeV
• Search for heavy charged long-lived particles in the ATLAS detector in 36.1 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV
• Measurement and QCD analysis of double-differential inclusive jet cross-sections in pp collisions at sqrt(s) = 8 TeV and ratios to 2.76 and 7 TeV
• Measurements of differential and double-differential Drell-Yan cross sections in proton-proton collisions at 8 TeV
• Measurement of the double-differential high-mass Drell-Yan cross section in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Directions for model building from asymptotic safety
• Model independent constraints on four-lepton operators
• Stabilizing Electroweak Vacuum in a Vector-like Fermion Model
• Running Electroweak Couplings as a Probe of New Physics
• Light vector-like fermions in a minimal SU(5) setup
• Insensitive Unification of Gauge Couplings
• Beautiful Mirrors, Unification of Couplings and Collider Phenomenology
• Unification of Gauge Couplings in the Standard Model with Extra Vector-like Families
• New Fermions at the LHC and Mass of the Higgs Boson
• Gauge coupling unification, the GUT scale, and magic fields
• String Scale Gauge Coupling Unification with Vector-like Exotics and Non-Canonical U(1)_Y Normalization
• ${\theta }_{13}$ and the Higgs mass from high scale supersymmetry
• Implications of Canonical Gauge Coupling Unification in High-Scale Supersymmetry Breaking
• Gauge Coupling Unification without Supersymmetry
• Minimal string-scale unification of gauge couplings
• Minimal Vectorlike Model in Supersymmetric Unification
• Unification with Vector-like fermions and signals at LHC
• Measurement of $CP$ observables in $B^{\pm }\to D{K}^{\ast \pm }$ decays using two- and four-body $D$ final states
• Precision Gauge Unification from Extra Yukawa Couplings
• Variants of the Standard Model with Electroweak-Singlet Quarks
• GUTs and String-GUTs
• Coupling Constant Unification in Extensions of Standard Model
• Low Scale Unification of Gauge Interactions
• Top quark, heavy fermions and the composite Higgs boson
• Effective Higgs Theories in Supersymmetric Grand Unification

Cited by in corpus (7)

• Phenomenology of vector-like leptons with Deep Learning at the Large Hadron Collider
• Determining the lifetime of long-lived particles at the HL-LHC
• An asymptotically safe SU(5) GUT
• Global analysis and LHC study of a vector-like extension of the Standard Model with extra scalars
• The Two Scales of New Physics in Higgs Couplings
• Unification Predictions With or Without Supersymmetry
• Road map through the desert with scalars