  We discuss the use of the CP asymmetry parameter (Acp) as a possible
observable of CP violation in the leptonic sector. In order to do this, we
study for a wide range of values of L/E the behavior of this asymmetry for the
corresponding maximal value of the CP violation factor allowed by all present
experimental limits on neutrino oscillations in vacuum and the recent
Super-Kamiokande atmospheric neutrino result. We work in the three neutrino
flavor framework.
