How light can the lightest neutralino be?
arXiv:0707.1425
Abstract
We show that in the Minimal Supersymmetric Standard Model, the mass of the lightest neutralino is experimentally unconstrained if the GUT relation between the gaugino mass parameters M_1 and M_2 is dropped. We discuss what the impact of light or massless neutralinos would be on their production at LEP, as well as on electroweak precision data and rare decays.
4 pages, 3 figures, Proceedings for the LCWS/ILC 2007 workshop at DESY, Hamburg, Germany; reference added, author name corrected