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Updated: Aug 18, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Late time neutrino masses, the LSND experiment, and the cosmic microwave background
Z Chacko1, Lawrence J Hall, Steven J Oliver
1Department of Physics, University of California-Berkeley, Berkeley, CA 94720, USA.
Abstract:
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 Liquid Scintillator Neutrino Detector experiment. Furthermore, the constraints on the sterile neutrino properties from nucleosynthesis and large-scale structure can be removed due to the nonconventional 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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