Physics Letters, B
It is shown that non-Standard Model bosons should obey an observable asymmetry in their decays to taus. This asymmetry enables a distinction to be made between charged Higgsboson signalsand heavy right-handed Wboson signals,by reconstructing the orientation of the z with respect to the beam axis.
Kaiser, David I., "Distinguishing a Charged Higgs Signal from a Heavy Wr Signal" (1993). Open Dartmouth: Faculty Open Access Articles. 2032.