Higgs troika for baryon asymmetry
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 smaller 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 ~0.1–10 TeV range couple to the “Higgs troika.” The new Higgs doublet masses are at or above the TeV scale, allowing for asymmetric decays into SM 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 could be 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 electric dipole moment or μ→eγ. Hence, this is in principle a testable model for the generation of baryon asymmetry.
- Research Organization:
- Univ. of Kansas, Lawrence, KS (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); State of Kansas EPSCoR Grant Program; University of Kansas
- Grant/Contract Number:
- SC0019474; SC0012704
- OSTI ID:
- 1603739
- Alternate ID(s):
- OSTI ID: 1607971; OSTI ID: 1630736; OSTI ID: 1772017
- Report Number(s):
- BNL-213782-2020-JAAM; TRN: US2206936
- Journal Information:
- Physical Review. D., Vol. 101, Issue 5; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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