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Journal Article

Leptogenesis with Lepton-Number-Violating Dirac Neutrinos

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37613

Heeck,  Julian
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

Fulltext (public)

1307.2241.pdf
(Preprint), 154KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Heeck, J. (2013). Leptogenesis with Lepton-Number-Violating Dirac Neutrinos. Physical Review D, 88(7): 076004. doi:10.1103/PhysRevD.88.076004.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-7263-3
Abstract
Dirac neutrinos with lepton-number-violating interactions can give rise to a new leptogenesis mechanism. In its simplest renormalizable realization, based on a gauged B-L symmetry spontaneously broken by four units, the decay of a new scalar creates an asymmetry in the right-handed neutrinos. A neutrinophilic two-Higgs-doublet model converts this asymmetry to the baryons, provides a natural explanation of the small neutrino masses, and can lead to an effective number of relativistic degrees of freedom of N(eff) = 3.29 due to the entropy-suppressed contribution of the right-handed neutrinos.