Generating the Electro-Weak Scale by Vector-like Quark Condensation

Abstract

We show that vector-like quarks in the fundamental or higher-dimensional representations of QCD can generate the electro-weak scale in a phenomenologically viable way by chiral symmetry breaking condensates. The thereby generated scales are determined by numerically solving the Dyson-Schwinger equation and these scales are sizable, because they grow with the hard vector-like mass. Communicating such a scale to the Standard Model via a conformally invariant scalar sector can dynamically generate the electro-weak scale without a naturalness problem, because all non-dynamical mass scales are protected by chiral symmetry. We present a minimal setup which requires only a new neutral scalar with mass not too far above the electro-weak scale, as well as vector-like quarks at the (multi-)TeV scale. Both are consistent with current bounds and are attractive for future experimental searches at the LHC and future colliders. Depending on the hypercharge of the vector-like quarks, hadrons made of them are color-neutral bound states which would be interesting Dark Matter candidates.

19 pages, 9 figures, 1 table

References in corpus (11)

• The QCD Equation of State with almost Physical Quark Masses
• Conformal Symmetry and the Standard Model
• Electroweak Symmetry Breaking induced by Dark Matter
• Scale invariant extension of the standard model with strongly interacting hidden sector
• Electroweak Higgs as a pseudo-Goldstone boson of broken scale invariance
• Propagators and phase structure of Nf=2 and Nf=2+1 QCD
• 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
• Direct determination of the strange and light quark condensates from full lattice QCD
• QCD phase transitions via a refined truncation of Dyson-Schwinger equations
• New insight on the quark condensate beyond chiral limit
• Extracting the $\bar{q}q$ condensate for light quarks beyond the chiral limit in models of QCD

Cited by in corpus (2)

• Non-perturbative Origin of Electroweak Scale via Higgs-portal: Dyson-Schwinger in Conformally Invariant Scalar Sector
• Non-perturbative Origin of the Electroweak Scale: RGE in Strongly-coupled Dark Gauge Theories via Dyson-Schwinger