Neutrinos that violate CPT, and the experiments that love them

Recently we proposed a framework for explaining the observed evidence for neutrino oscillations without enlarging the neutrino sector, by introducing CPT-violating Dirac masses for the neutrinos, In this Letter we continue the exploration of the phenomenology of CPT violation in the neutrino sector. We show that our CPT-violating model fits the existing SuperKariokande data at least as well as the standard atmospheric neutrino oscillation models, We discuss the challenge of measuring CP violation in a neutrino sector that also violates CPT. We point out that the proposed off-axis extension of MINOS looks especially promising in this regard. Finally. we describe a method to compute CPT-violating neutrino effects by mocking them LIP with analog matter effects. (C) 2002 Elsevier Science B.V All rights reserved.