Spontaneous Twin Symmetry Breaking

Abstract

We consider a twin Higgs scenario where the $Z_2$ twin symmetry is broken spontaneously, not explicitly. This scenario provides an interesting interpretation of the Higgs metastability in the standard model; the $SU(4)$ breaking scale $f$ is determined by the scale where the Higgs self quartic coupling flips its sign. However, for the misalignment of nonzero vacuum expectation values of the twin Higgs fields, parameter tuning of $\mathcal{O}(m_h^2/f^2)$ is required like explicit twin symmetry breaking scenarios. For the minimal model with the exact twin symmetry, $f$ is $\mathcal{O}$($10^{10}$ GeV), so the model is very unnatural. We point out that the tuning can be significantly reduced ($f\gtrsim 2.7$ TeV) if there are twin vector-like leptons with large Yukawa coupling to twin Higgs fields.

arXiv comment8 pages, 6 figures; published version

References in corpus (31)

• Investigating the near-criticality of the Higgs boson
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• The Anatomy of Electro-Weak Symmetry Breaking. I: The Higgs boson in the Standard Model
• Vector-like leptons: Higgs decays and collider phenomenology
• Explanation of the Muon g-2 Anomaly with Vectorlike Leptons and its Implications for Higgs Decays
• Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for Heavy Neutral and Charged Leptons in e+ e- Annihilation at LEP
• Singlet-Doublet Dark Matter
• Heavy Neutral Leptons at FASER
• Vectorlike leptons at the Large Hadron Collider
• Cosmology in Mirror Twin Higgs and Neutrino Masses
• Colorless Top Partners, a 125 GeV Higgs, and the Limits on Naturalness
• Dark matter and Higgs boson physics
• Minimal Mirror Twin Higgs
• Cosmological Signals of a Mirror Twin Higgs
• Anthropic solution to the magnetic muon anomaly: the charged see-saw
• Radiative neutrino masses in the singlet-doublet fermion dark matter model with scalar singlets
• Vector-like Leptons: Muon g-2 Anomaly, Lepton Flavor Violation, Higgs Decays, and Lepton Non-Universality
• Leptons in Composite MFV
• Implications of Higgs Discovery for the Strong CP Problem and Unification
• Heavy lepton pair production at LHC: model discrimination with multi-lepton signals
• Minimal Vector-like leptonic Dark Matter and Signatures at the LHC
• The spontaneous ${\mathbb{Z}}_2$ breaking Twin Higgs
• Singlet-Doublet Fermionic Dark Matter, Neutrino Mass and Collider Signatures
• The Radiative Z2 Breaking Twin Higgs
• Higgs Parity, Strong CP, and Dark Matter
• A Vector-like Extension of the Standard Model
• New Emerging Results in Higgs Precision Analysis Updates 2018 after Establishment of Third-Generation Yukawa Couplings
• Singleton Portals to the Twin Sector
• Neglected heavy leptons at the LHC
• Constraints from Triple Gauge Couplings on Vectorlike Leptons

Cited by in corpus (8)

• Twin Higgs Portal Dark Matter
• Direct Detection of Atomic Dark Matter in White Dwarfs
• Collider Signals of the Mirror Twin Higgs through the Hypercharge Portal
• Cosmology of the Twin Higgs without explicit ${\mathbb{Z}}_2$ breaking
• Current status on pair-produced muon-philic vectorlike leptons in multilepton channels at the LHC
• The Type II Dirac Seesaw Portal to the mirror sector: Connecting neutrino masses and a solution to the strong CP problem
• Breaking Mirror Twin Color
• Review of Neutral Naturalness