Distinguishing Indirect Signatures of New Physics at the NLC: Z' Versus   R-Parity Violation
  R-parity violation and extensions of the Standard Model gauge structure offer two non-minimal realizations of supersymmetry at low energies that can lead to similar new physics signatures at existing and future colliders. We discuss techniques that can be employed at the NLC below direct production threshold to distinguish these two new physics scenarios. 
Thomas G. Rizzo