Maximal νμ–ντ oscillations, the see-saw mechanism and the Exact Parity Model

We examine one simple mechanism which leads to approximate maximal νμ–ντ oscillations in the standard see-saw model. In particular, we show that this scheme could be implemented in the Exact Parity Model (also known as the mirror matter model). Within this framework the solar neutrino problem is solved by maximal νe→ν′e oscillations (with ν′e is the essentially sterile mirror partner of νe) and the LSND evidence for νe→νμ oscillations can also be explained.