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Leptogenesis from oscillations and dark matter
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An extension of the Standard Model with Majorana singlet fermions in the 1-100 GeV range can give rise to a baryon asymmetry at freeze-in via the CP-violating oscillations of these neutrinos: this is the well known ARS mechanism. In this paper we consider possible extensions of the minimal ARS scenario that can account not only for successful leptogenesis but also explain other open problems such as dark matter. We find that an extension in the form of a weakly coupled B-L gauge boson, an invisible QCD axion model, and the singlet majoron model can simultaneously account for dark matter and the baryon asymmetry.
Forward citations
Cited by 3 Pith papers
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Impact of dim-6 $\nu$SMEFT operators on low-scale leptogenesis
A dimension-six, lepton-number-conserving νSMEFT operator can enhance or suppress the baryon asymmetry from low-scale leptogenesis by orders of magnitude, and its observable 0νββ signature would exclude most of the su...
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Freeze-in leptogenesis with sterile neutrino self-interactions
An off-diagonal thermal potential from sterile neutrino self-interactions generates the baryon asymmetry at lower order in the Yukawa coupling, boosting it and relaxing the mass degeneracy required in vanilla ARS lept...
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Vector dark matter with non-abelian kinetic mixing
A four-boson dark sector with one non-abelian kinetic-mixing operator can produce the observed dark-matter abundance by freeze-out, freeze-in, or 3-to-2 annihilations, with a dark-photon mediator almost degenerate wit...
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