Dirac neutrinos from a second Higgs doublet

Abstract

We propose a minimal extension of the Standard Model in which neutrinos are Dirac particles and their tiny masses are explained without requiring tiny Yukawa couplings. A second Higgs doublet with a tiny vacuum expectation value provides neutrino masses while simultaneously improving the naturalness of the model by allowing a heavier Standard Model-like Higgs boson consistent with electroweak precision data. The model predicts a mu to e gamma rate potentially detectable in the current round of experiments, as well as distinctive signatures in the production and decay of the charged Higgs H+ of the second doublet which can be tested at future colliders. Neutrinoless double beta decay is absent.

7 pages, 3 figures; v2: intro expanded, refs added, submitted to PRD

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• Long-lived TeV-scale right-handed neutrino production at the LHC in gauged $U(1{)}_X$ model
• $A_4$ Flavour Model for Dirac Neutrinos: Type I and Inverse Seesaw
• $Z^{\prime }$s in neutrino scattering at DUNE
• Observing Dirac neutrinos in the cosmic microwave background
• A(4) Flavor Symmetry Model for Dirac-Neutrinos and Sizable U(e3)
• Naturally Small Dirac Neutrino Mass with Intermediate $SU(2{)}_L$ Multiplet Fields
• Linear Seesaw for Dirac Neutrinos with $A_4$ Flavour Symmetry
• Dirac right-handed sneutrino dark matter and its signature in the gamma-ray lines
• LHC phenomenology of a two-Higgs-doublet neutrino mass model
• Loop Suppression of Dirac Neutrino Mass in the Neutrinophilic Two Higgs Doublet Model
• Common Origin of Neutrino Mass, Dark Matter and Dirac Leptogenesis
• Dark Matter and Exotic Neutrino Interactions in Direct Detection Searches
• Naturally Light Dirac Neutrino in Left-Right Symmetric Model
• Natural leptogenesis and neutrino masses with two Higgs doublets
• Probing the seesaw mechanism at the 250 GeV ILC
• $\nu$-Two Higgs Doublet Model and its Collider Phenomenology
• Yukawa alignment from natural flavor conservation
• Light Dirac neutrino portal dark matter with observable $\Delta N_{\mathrm{eff}}$
• Connecting Light Dirac Neutrinos to a Multi-component Dark Matter Scenario in Gauged $B-L$ Model
• Simplest Radiative Dirac Neutrino Mass Models
• A New Light Higgs Boson and Short-Baseline Neutrino Anomalies
• Common Origin of Dirac Neutrino Mass and Freeze-in Massive Particle Dark Matter
• Leptogenesis with Lepton-Number-Violating Dirac Neutrinos
• Limits on Neutrinophilic Two-Higgs-Doublet Models from Flavor Physics
• A natural $Z^{\prime }$-portal Majorana dark matter in alternative U(1) extended Standard Model
• Light Sterile Neutrino and Dark Matter in Left-Right Symmetric Models Without Higgs Bidoublet
• Chiral $Z^{\prime }$ in FASER, FASER2, DUNE, and ILC beam dump experiments
• TeV-scale seesaw from a multi-Higgs model
• Unraveling the Dirac Neutrino with Cosmological and Terrestrial Detectors
• The charged lepton mass matrix and non-zero ${\theta }_{13}$ with TeV scale New Physics
• Vacuum stability in neutrinophilic Higgs doublet model
• Radiative Dirac Neutrino Mass with Dark Matter and it's implication to $0\nu 4\beta$ in the $U(1{)}_{B-L}$ extension of the Standard Model
• Lower Limits on $\mu \to e\gamma$ from new Measurements on $U_{e3}$
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• Dirac neutrino from the breaking of Peccei-Quinn symmetry
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• Hunting for Heavy Majorana Neutrinos with Lepton Number Violating Signatures at LHC
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• Low scale Dirac leptogenesis and dark matter with observable $\Delta N_{\mathrm{eff}}$
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• Freeze-in Dark Matter via Light Dirac Neutrino Portal
• Light Dirac right-handed sneutrino dark matter
• Heavy Majorana neutrino pair production from $Z^{\prime }$ at hadron and lepton colliders
• Survey of Texture Zeros with Light Dirac Neutrinos
• Diraxiogenesis
• LHC explores what LEP hinted at: CP-violating type-I 2HDM
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• Probing Models of Dirac Neutrino Masses via the Flavor Structure of the Mass Matrix
• The Supersymmetric Leptophilic Higgs Model
• Common origin of modified chaotic inflation, non thermal dark matter and Dirac neutrino mass
• Probing for chiral $Z^{\prime }$ gauge boson through scattering measurement experiments
• Thermal leptogenesis in a supersymmetric neutrinophilic Higgs model
• Testing neutrino mass generation mechanisms from the lepton flavor violating decay of the Higgs boson
• A new radiative neutrino mass generation mechanism with higher dimensional scalar representations and custodial symmetry
• Leptogenesis and Dark Matter from Low Scale Seesaw
• Affleck-Dine Cogenesis of Baryon and Dark Matter
• Quasi-Dirac neutrinos in a model with local $B-L$ symmetry
• Searching for an elusive charged Higgs at the Large Hadron Collider
• A Supersymmetric Model with Dirac Neutrino Masses
• Texture zeros of low-energy Majorana neutrino mass matrix in 3+1 scheme
• Collider and CMB complementarity of leptophilic dark matter with light Dirac neutrinos
• Large invisible decay of a Higgs boson to neutrinos
• Freeze-in Dirac neutrinogenesis: thermal leptonic CP asymmetry
• Effective neutrino number shift from keV-vacuum neutrinophilic 2HDM
• Exploring collider aspects of a neutrinophilic Higgs doublet model in multilepton channels
• The Many Guises of a Neutral Fermion Singlet
• Search for a light $Z^{\prime }$ at LHC in a neutrinophilic $U(1)$ model
• Freeze-In of radiative keV-scale neutrino dark matter from a new $\text{U}(1{)}_{\text{B-L}}$
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• A predictive model of Dirac Neutrinos
• Phenomenology of SUSY SU(5) GUT with neutrinophilic Higgs
• Connecting $(g-2{)}_{\mu }$ to neutrino mass in the extended neutrinophilic 2HDM
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• Charged Higgs effects in IceCube: PeV events and NSIs
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• TeV-scale seesaw with non-negligible left-right neutrino mixings
• Explanation of IceCube spectrum with $\nu \to 3\nu$ neutrino splitting in a $\nu$2HDM model
• Resonant leptogenesis with mild degeneracy
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• Right-handed sneutrinos as asymmetric DM and neutrino masses from neutrinophilic Higgs bosons
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• Anomaly-free 2HDMs with a gauged abelian symmetry and two generations of right-handed neutrinos
• Phenomenology in supersymmetric neutrinophilic Higgs model with sneutrino dark matter
• The $\nu$THDM with the Inverse Seesaw Mechanisms
• Dark Energy from pNGB Mediated Dirac Neutrino Condensate
• Right handed neutrino production from $Z^{\prime }$ interactions in forward search experiments
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• Forbidden neutrinogenesis
• Charged Higgs and Neutral Higgs pair production of weak gauge bosons fusion process in e+ e- collision
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