Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-02-21
AIP Conf.Proc.966:163-169,2007
Astronomy and Astrophysics
Astrophysics
7 pages, 3 figures. Contribution to proceedings of the 4th Sino-Italian Workshop on Relativistic Astrophysics, Pescara, 20-30
Scientific paper
10.1063/1.2836988
We review the recent proposal by Lattanzi & Valle of the majoron as a suitable warm dark matter candidate. The majoron is the Goldstone boson associated to the spontaneous breaking of ungauged lepton number, one of the mechanisms proposed to give rise to neutrino masses. The majoron can acquire a mass through quantum gravity effects, and can possibly account for the observed dark matter component of the Universe. We present constraints on the majoron lifetime, mass and abundance obtained by the analysis of the cosmic microwave background data. We find that, in the case of thermal production, the limits for the majoron mass read 0.12 keV
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