Correlations in neutrino factory parameter space

The extraction of neutrino masses, mixing angles and leptonic CP violation at neutrino factories requires a careful treatment of parameter correlations. Including the uncertainties of all involved parameters and statistical errors we find previously ignored correlations in the multidimensional parameter space, leading to modifications in the physics reach, which amount in some cases to one order of magnitude. The parameter correlations are especially important for the largest possible values of Δm221, where the θ13 sensitivity limit are considerably reduced.