  We study nuclear mu-e conversion in the general framework of an effective
Lagrangian approach without referring to any specific realization of the
physics beyond the standard model (SM) responsible for lepton flavor violation
(LFV). We show that vector meson exchange between lepton and nucleon currents
plays an important role in this process. A new issue of this mechanism is the
presence of the strange quark vector current contribution induced by the phi
meson. This allows us to extract new limits on the LFV lepton-quark effective
couplings from the existing experimental data.

High Energy Physics - Phenomenology