Bosonic seesaw mechanism in a classically conformal extension of the Standard Model

Abstract

We suggest the so-called bosonic seesaw mechanism in the context of a classically conformal $U(1{)}_{B-L}$ extension of the Standard Model with two Higgs doublet fields. The $U(1{)}_{B-L}$ symmetry is radiatively broken via the Coleman-Weinberg mechanism, which also generates the mass terms for the two Higgs doublets through quartic Higgs couplings. Their masses are all positive but, nevertheless, the electroweak symmetry breaking is realized by the bosonic seesaw mechanism. Analyzing the renormalization group evolutions for all model couplings, we find that a large hierarchy among the quartic Higgs couplings, which is crucial for the bosonic seesaw mechanism to work, is dramatically reduced toward high energies. Therefore, the bosonic seesaw is naturally realized with only a mild hierarchy, if some fundamental theory, which provides the origin of the classically conformal invariance, completes our model at some high energy, for example, the Planck scale. We identify the regions of model parameters which satisfy the perturbativity of the running couplings and the electroweak vacuum stability as well as the naturalness of the electroweak scale.

5 pages, 2 figures, published version in PLB

References in corpus (9)

• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Scale invariant extension of the standard model with strongly interacting hidden sector
• Shadow Higgs from a scale-invariant hidden $U(1{)}_s$ model
• Accidental Dark Matter: Case in the Scale Invariant Local $B-L$ Models
• Galactic Centre GeV Photons from Dark Technicolor
• Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking
• Nambu-Goldstone Dark Matter in a Scale Invariant Bright Hidden Sector
• Dark chiral symmetry breaking and the origin of the electroweak scale
• Scale and electroweak first-order phase transitions

Cited by in corpus (22)

• Dark Matter from a Classically Scale-Invariant $SU(3{)}_X$
• Classically conformal U(1)' extended standard model, electroweak vacuum stability, and LHC Run-2 bounds
• Conformal model for gravitational waves and dark matter: A status update
• Minimal conformal extensions of the Higgs sector
• Type-I Seesaw as the Common Origin of Neutrino Mass, Baryon Asymmetry, and the Electroweak Scale
• Evolving Planck Mass in Classically Scale-Invariant Theories
• Scale genesis and gravitational wave in a classically scale invariant extension of the standard model
• Scale Invariant FIMP Miracle
• A new dynamics of electroweak symmetry breaking with classically scale invariance
• Right-handed neutrino dark matter in the classically conformal U(1)' extended Standard Model
• Phenomenology of flavorful composite vector bosons in light of $B$ anomalies
• Electroweak phase transition in the nearly aligned Higgs effective field theory
• A Walking Dilaton Inflation
• The Higgs of the Higgs and the diphoton channel
• Invisible Axion-Like Dark Matter from Electroweak Bosonic Seesaw
• Electroweak vacuum stability in classically conformal B-L extension of the Standard Model
• Scalegenesis via dynamically induced multiple seesaws
• Aspects of a nonminimal conformal extension of the standard model
• Walking-dilaton hybrid inflation with $B-L$ Higgs embedded in dynamical scalegenesis
• A mechanism to generate varying speed of light via Higgs-dilaton coupling: Theory and cosmological applications
• $SU(3{)}^p$ Quiver Theories with $\mathcal{N}=0$ for $p=8$ and $9$
• Flavor structure from flavored Higgs mixing