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Soft L-e - L-mu - L-tau flavour symmetry breaking and sterile neutrino keV Dark Matter
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.
2011 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, Vol. 2011, no 01, 034- p.Article in journal (Refereed) Published
Abstract [en]

We discuss how a L-e - L-mu - L-tau flavour symmetry that is softly broken leads to keV sterile neutrinos, which are a prime candidate for Warm Dark Matter. This is to our knowledge the first model where flavour symmetries are applied simultaneously to active and sterile neutrinos explaining at the same time active neutrino properties and this peculiar Dark Matter scenario. The essential point is that different scales of the symmetry breaking and the symmetry preserving entries in the mass matrix lead to one right- handed neutrino which is nearly massless compared to the other two. Furthermore, we naturally predict vanishing theta(13) and maximal theta(23), while the correct value of theta(12) must come from the mixing of the charged leptons. We can furthermore predict an exact mass spectrum for the light neutrinos, which will be testable in the very near future.

Place, publisher, year, edition, pages
IOP Publishing , 2011. Vol. 2011, no 01, 034- p.
Keyword [en]
dark matter theory, neutrino properties, neutrino theory, cosmological neutrinos
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-31005DOI: 10.1088/1475-7516/2011/01/034ISI: 000286802900034OAI: diva2:402876
QC 20110310Available from: 2011-06-22 Created: 2011-03-07 Last updated: 2011-06-22Bibliographically approved

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