Dirac Leptogenesis with a Non-anomalous $U(1{)}^{\prime }$ Family Symmetry

Abstract

We propose a model for Dirac leptogenesis based on a non-anomalous $U(1{)}^{\prime }$ gauged family symmetry. The anomaly cancellation conditions are satisfied with no new chiral fermions other than the three right-handed neutrinos, giving rise to stringent constraints among the charges. Realistic masses and mixing angles are obtained for all fermions. The model predicts neutrinos of the Dirac type with naturally suppressed masses. Dirac leptogenesis is achieved through the decay of the flavon fields. The cascade decays of the vector-like heavy fermions in the Froggatt-Nielsen mechanism play a crucial role in the separation of the primodial lepton numbers. We find that a large region of parameter space of the model gives rise to a sufficient cosmological baryon number asymmetry through Dirac leptogenesis.

8 pages, 8 figures, version to appear in JHEP

References in corpus (4)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Leptogenesis
• The Minimal Phantom Sector of the Standard Model: Higgs Phenomenology and Dirac Leptogenesis
• Leptogenesis without violation of B-L

Cited by in corpus (12)

• An Anomaly-free Atlas: charting the space of flavour-dependent gauged $U(1)$ extensions of the Standard Model
• Common Origin of Neutrino Mass, Dark Matter and Dirac Leptogenesis
• MeV dark matter in the 3+1+1 model
• Low scale Dirac leptogenesis and dark matter with observable $\Delta N_{\mathrm{eff}}$
• Solving local anomaly equations in gauge-rank extensions of the Standard Model
• S.M.A.S.H.E.D.: Standard Model Axion Seesaw Higgs Inflation Extended for Dirac Neutrinos
• $E_6$ Motivated UMSSM Confronts Experimental Data
• Dark matter and Collider signals in supersymmetric $U(1{)}^{\prime }$ models with non-universal $Z^{\prime }$ couplings
• A $\nu$ Supersymmetric Anomaly-free Atlas
• Unified Origin of Dirac Neutrino and Asymmetric Dark Matter Masses via a Dirac-Type Leptogenesis
• Cogenesis of visible and dark matter in type-I Dirac seesaw
• Probing High Scale Dirac Leptogenesis via Gravitational Waves from Domain Walls