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Leptogenesis with Dirac Neutrinos
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We describe a "neutrinogenesis" mechanism whereby, in the presence of right-handed neutrinos with sufficiently small pure Dirac masses, (B+L)-violating sphaleron processes create the baryon asymmetry of the Universe, even when B=L=0 initially. It is shown that the resulting neutrino mass constraints are easily fulfilled by the neutrino masses suggested by current experiments. We present a simple toy model which uses this mechanism to produce the observed baryon asymmetry of the Universe. (PostScript Errors corrected in latest Version).
Forward citations
Cited by 6 Pith papers
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Universal Seesaw Leptogenesis
Leptogenesis can proceed from single-generation gauge-singlet mediator decays in a Universal Seesaw model if parity is broken in the neutrino sector; the lightest right-handed neutrino is a sub-eV dark-radiation relic.
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Primordial Dirac Leptogenesis
Baryogenesis can proceed via CP-violating inflaton decays that imprint an asymmetry in an inert Higgs doublet, which decays into Dirac neutrinos and is converted by sphalerons to the observed baryon asymmetry.
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Thermal Leptogenesis in the BNT Model of Neutrino Mass
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Conversion-Driven Baryogenesis in Flavored Dark Matter Models
Quark-philic flavored dark matter realizes conversion-driven baryogenesis via CP-violating mediator conversions, yielding viable DM masses up to ~1.2 TeV and long-lived-particle LHC signatures.
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The mass-coupling effect in leptogenesis
In weak-washout heavy-particle decay leptogenesis, the lepton asymmetry is approximately independent of the decaying particle mass and the couplings of thermalized decay products, because the nonthermal distribution s...
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Electromagnetic Dirac Cogenesis
A single out-of-equilibrium decay chain of heavy vector-like fermions via electromagnetic dipole operators can simultaneously generate the baryon asymmetry and an asymmetric dark matter relic with mass around 1.9 prot...
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