Light photinos as dark matter
Light photinos as dark matter
There are good reasons to consider models of low-energy supersymmetry with very light photinos and gluinos. In most of these models the lightest $R$-odd, color-singlet state containing a gluino, the ${R}^{0}$, has a mass in the 1-2 GeV range and the slightly lighter photino $\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\ensuremath{\gamma}}$ would survive as …