期刊
EUROPEAN PHYSICAL JOURNAL C
卷 56, 期 3, 页码 379-387出版社
SPRINGER
DOI: 10.1140/epjc/s10052-008-0661-z
关键词
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资金
- Japan Society for the Promotion of Science [17540246]
- Grants-in-Aid for Scientific Research [17540246] Funding Source: KAKEN
We propose a unified explanation for the origin of dark matter and baryon number asymmetry on the basis of a non-supersymmetric model for the neutrino masses. Neutrino masses are generated in two distinct ways, that is, a tree-level seesaw mechanism with a single right-handed neutrino, and one-loop radiative effects by a new additional doublet scalar. A spontaneously broken U(1)' brings about a Z(2) symmetry which restricts couplings of this new scalar and controls the neutrino masses. It also guarantees the stability of a CDM candidate. We examine two possible candidates for the CDM. We also show that the decay of a heavy right-handed neutrino related to the seesaw mechanism can generate baryon number asymmetry through leptogenesis.
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