We investigate whether flavor changing neutrino interactions (FCNIs) can be sufficiently large to provide a viable solution to the atmospheric neutrino problem. Effective operators induced by heavy boson exchange that allow for flavor changing neutrino sca

isproportionaltotheneutrondensityanditssizeischaracterizedbytheratiobetweenVFCNCandthestandard( avordiagonal)neutralcurrent(NC)potentialVNC:

Zν=VFCNC