Some Crucial Predictions of Compositeness for Experiments at 100-GeVe+e−Colliders

Under the assumption that the quarks and the Higgs boson are composites, it has been argued that the third $\tau$ family is expected, on rather general grounds, to have an inverse size of order only 1 TeV. We note that the study of $e^{-}{e}^{+}\to t-\mathrm{quarkonium}\to {\tau }^{-}{\tau }^{+}$ would be especially suitable to observe this compositeness already at energies of the CERN large electron-positron collider ring (LEP), assuming that $m_{\mathrm{top}}\lesssim 50$ GeV.