What does the muon-neutrino oscillate into?

Abstract

The favoured resolution of the atmospheric neutrino anomaly involves an oscillation of the muon neutrino to a different state. Current experiments allow for the latter to contain a significantly large fraction of a non-standard flavour. We demonstrate how the next generation of experiments may take advantage of matter effects to resolve this issue.

Comments: 4 pages, LaTex, 7 figures