Can we identify a light neutralino in B-factories?

If a light gaugino sector exists, then the lightest supersymmetric particle (LSP) has a chance of being pair-produced in rare B-decays. As a consequence of neutral flavour violation in most supersymmetric models, such decays can occur at the tree-level and reinforce the B → K (K∗) + invisible channels. We discuss how a study of such decay spectra in B-factories can help us either identify or exclude a light LSP.