Late Time Neutrino Masses, the LSND Experiment and the Cosmic Microwave Background

Details Late Time Neutrino Masses, the LSND Experiment and the Cosmic Microwave Background Late Time Neutrino Masses, the LSND Experiment and the Cosmic Microwave Background

2004-05-07

arxiv.org/abs/hep-ph/0405067v1

Phys.Rev.Lett.94:111801,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, revtex4

Scientific paper

10.1103/PhysRevLett.94.111801

Models with low-scale breaking of global symmetries in the neutrino sector provide an alternative to the seesaw mechanism for understanding why neutrinos are light. Such models can easily incorporate light sterile neutrinos required by the LSND experiment. Furthermore, the constraints on the sterile neutrino properties from nucleosynthesis and large scale structure can be removed due to the non-conventional cosmological evolution of neutrino masses and densities. We present explicit, fully realistic supersymmetric models, and discuss the characteristic signatures predicted in the angular distributions of the cosmic microwave background.

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