CPT-odd resonances in neutrino oscillations

We consider the consequences for future neutrino factory experiments of sma ll CPT-odd interactions in neutrino oscillations. The nu (mu) --> nu (mu) a nd <(<nu>)over bar>(mu) --> <(<nu>)over bar>(mu) survival probabilities at a baseline L = 732 km can test for CPT-odd contributions at orders of magni tude better sensitivity than present neutrino sector limits. Interference b etween the CPT-violating interaction and CPT-even mass terms in the Lagrang ian can lead to a resonant enhancement of the oscillation amplitude. For os cillations in matter, a simultaneous enhancement of both neutrino and antin eutrino oscillation amplitudes is possible.