Testing non-standard CP violation in neutrino propagation

Non-standard physics which can be described by effective four fermion interactions may be in additional source of CP violation in the neutrino propagation. We discuss the detectability of Such a CP violation at a neutrino factory. We assume the Current baseline setup of the international design study of a neutrino factory (IDS-NF) for the simulation. We find that the CP violation from certain non-standard interactions is, in principle, detectable significantly below their Current bounds - even if there is no CP violation in the standard oscillation framework. Therefore, a new physics effect might be mis-interpreted as the canonical Dirac CP violation. and a possibly even more exciting effect might be missed. (C) 2008 Elsevier B.V. All rights reserved.