Tau polarization asymmetry as a probe ofZ’ couplings

Studying the decay of a Z’ to ${\mathrm{\tau }}^{+}$ ${\mathrm{\tau }}^{\mathrm{-}}$ at a future hadron collider will allow its polarization asymmetry to be measured, and will provide direct information about its leptonic couplings. It has not previously been appreciated that this measurement was possible. If this measurement is to be performed, detectors at the Superconducting Super Collider and Large Hadron Collider must be able to trigger on high-energy τ’s.