Is there maximal mixing in the lepton sector?
  We discuss the potential of long-baseline neutrino oscillation experiments to determine deviations from maximal \nu_\mu-\nu_\tau mixing. We compare the obtainable sensitivities to predictions from neutrino mass models and to the size of quantum corrections. We find that the theoretical expectations for deviations are typically well within experimental reach. 
Stefan Antusch, Patrick Huber, Joern Kersten, Thomas Schwetz, Walter   Winter