  New heavy gauge bosons exist in many models of new physics beyond the
standard model of particle physics. Discovery of these W^\prime and Z^\prime
resonances and the establishment of their spins, couplings, and other quantum
numbers would shed light on the gauge structure of the new physics. The
measurement of the polarization of the SM fermions from the gauge boson decays
would decipher the handedness of the coupling of the new states, an important
relic of the primordial new physics symmetry. Since the top quark decays
promptly, its decay preserves spin information. We show how decays of new gauge
bosons into third generation fermions (W^\prime \to tb, Z^\prime\to t\bar{t})
can be used to determine the handedness of the couplings of the new states and
to discriminate among various new physics models.
