scholarly journals Thermal dark matter through the Dirac neutrino portal

2018 ◽  
Vol 97 (7) ◽  
Author(s):  
Brian Batell ◽  
Tao Han ◽  
David McKeen ◽  
Barmak Shams Es Haghi
Keyword(s):  
Dark Matter ◽  
Dirac Neutrino

scholarly journals Dynamical framework for KeV Dirac neutrino warm dark matter

2014 ◽  
Vol 90 (4) ◽  
Author(s):  
Dean J. Robinson ◽  
Yuhsin Tsai
Keyword(s):  
Dark Matter ◽  
Dirac Neutrino

scholarly journals Light Dirac neutrino portal dark matter with observable ΔN eff

2021 ◽  
Vol 2021 (10) ◽  
pp. 002
Author(s):  
Anirban Biswas ◽  
Debasish Borah ◽  
Dibyendu Nanda
Keyword(s):  
Dark Matter ◽  
Dirac Neutrino

scholarly journals Scotogenic cobimaximal Dirac neutrino mixing from $$\Delta (27)$$ and $$U(1)_\chi $$

2019 ◽  
Vol 79 (11) ◽  
Author(s):  
Ernest Ma
Keyword(s):  
Dark Matter ◽  
Lepton Number ◽  
Neutrino Masses ◽  
Neutrino Mixing ◽  
Dirac Neutrino

Abstract In the context of $$SU(3)_C \times SU(2)_L \times U(1)_Y \times U(1)_\chi $$SU(3)C×SU(2)L×U(1)Y×U(1)χ, where $$U(1)_\chi $$U(1)χ comes from $$SO(10) \rightarrow SU(5) \times U(1)_\chi $$SO(10)→SU(5)×U(1)χ, supplemented by the non-Abelian discrete $$\Delta (27)$$Δ(27) symmetry for three lepton families, Dirac neutrino masses and their mixing are radiatively generated through dark matter. The gauge $$U(1)_\chi $$U(1)χ symmetry is broken spontaneously. The discrete $$\Delta (27)$$Δ(27) symmetry is broken softly and spontaneously. Together, they result in two residual symmetries, a global $$U(1)_L$$U(1)L lepton number and a dark symmetry, which may be $$Z_2$$Z2, $$Z_3$$Z3, or $$U(1)_D$$U(1)D depending on what scalar breaks $$U(1)_\chi $$U(1)χ. Cobimaximal neutrino mixing, i.e. $$\theta _{13} \ne 0$$θ13≠0, $$\theta _{23} = \pi /4$$θ23=π/4, and $$\delta _{CP} = \pm \pi /2$$δCP=±π/2, may also be obtained.

17 keV NEUTRINO AND MAJORON MODELS

1992 ◽  
Vol 07 (09) ◽  
pp. 2021-2031 ◽  
Author(s):  
ANJAN S. JOSHIPURA
Keyword(s):  
Dark Matter ◽  
Vacuum Expectation ◽  
Vacuum Expectation Value ◽  
Expectation Value ◽  
Dirac Neutrino ◽  
Dirac Mass ◽  
Left Handed ◽  
The Invisible

A model for the 17 keV Dirac neutrino is considered in the framework of the SU(2) × U(1) theory. No right-handed neutrinos are introduced. The Dirac mass for the neutrino arises from the Le+Lτ–Lμ invariant couplings of the left-handed neutrinos to an SU(2) triplet. An SU(2) singlet field is introduced to suppress the Majoron coupling to the Z. This makes the model consistent with the LEP results on the invisible Z width. The singlet vacuum expectation value ω is constrained to be ≤O(80 MeV) from cosmological considerations. For, ω≈80 MeV, the 17 keV neutrino is shown to provide the bulk of the dark matter.

scholarly journals Bound-state dark matter and Dirac neutrino masses

2018 ◽  
Vol 97 (11) ◽  
Author(s):  
M. Reig ◽  
D. Restrepo ◽  
J. W. F. Valle ◽  
O. Zapata
Keyword(s):  
Dark Matter ◽  
Bound State ◽  
Neutrino Masses ◽  
Dirac Neutrino

scholarly journals Dirac neutrino dark matter

2008 ◽  
Vol 2008 (01) ◽  
pp. 009 ◽  
Author(s):  
Geneviève Bélanger ◽  
Alexander Pukhov ◽  
Géraldine Servant
Keyword(s):  
Dark Matter ◽  
Dirac Neutrino
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