Higgs Troika for Baryon Asymmetry

Abstract

To explain the baryon asymmetry of the Universe, we extend the Standard Model (SM) with two additional Higgs doublets with small vacuum expectation values. The additional Higgs fields interact with SM fermions through complex Yukawa couplings, leading to new sources of CP violation. We propose a simple flavor model with $\mathcal{O}(1)$ or less Yukawa couplings for quarks and charged leptons, consistent with current flavor constraints. To generate neutrino masses and the baryon asymmetry, right-handed neutrinos in the $\sim 0.1-10$ TeV range couple to the "Higgs Troika." The new Higgs doublet masses could be near the TeV scale, allowing for asymmetric decays into Standard Model lepton doublets and right-handed neutrinos. The asymmetry in lepton doublets is then processed into a baryon asymmetry, similar to leptogenesis. Since the masses of the new fields are near the TeV scale, there is potentially a rich high energy collider phenomenology, including observable deviations in the 125 GeV Higgs decay into muons and taus, as well as detectable low energy signals such as the electron EDM or $\mu \to e\gamma$. Hence, this is in principle a testable model for generation of baryon asymmetry, similar in that respect to "electroweak baryogenesis."

arXiv comment11 pages, 2 figures. Extended discussion of reheating mechanism, minor revisions

References in corpus (16)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
• Baryogenesis from a Lepton Asymmetric Universe
• The design of the MEG II experiment
• Leptogenesis with Dirac Neutrinos
• Hylogenesis: A Unified Origin for Baryonic Visible Matter and Antibaryonic Dark Matter
• Heavy Majorana Neutrinos and Baryogenesis
• Realistic Dirac Leptogenesis
• Higgs doublet decay as the origin of the baryon asymmetry
• Neutrino Mass and Baryon Asymmetry from Dirac Seesaw
• Baryogenesis from L-violating Higgs-doublet decay in the density-matrix formalism
• Enhanced Di-Higgs Production in the Two Higgs Doublet Model
• Limits on Neutrinophilic Two-Higgs-Doublet Models from Flavor Physics
• Technicolor Assisted Leptogenesis with an Ultra-Heavy Higgs Doublet

Cited by in corpus (8)

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• Multi-TeV Signals of Baryogenesis in Higgs Troika Model
• Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
• Complementary collider and astrophysical probes of multi-component Dark Matter
• Extending Trinity to the Scalar Sector through Discrete Flavoured Symmetries
• Exploring Strange Origin of Dirac Neutrino Masses at Hadron Colliders
• A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents
• The Lepton Flavor Changing Decays and One-loop Muon Anomalous Magnetic Moment in the Extended Mirror Twin Higgs Models