SEARCH FOR THE PRODUCTION OF THE FINAL-STATES TAU+TAU- E+E-, TAU+TAU-MU+MU-, AND TAU+TAU-PI+PI- IN E+E- COLLISIONS AT SQUARE-ROOT-OF-S = 29 GEV

We have searched for the reaction e+ e- --> tau+ tau- ffBAR, where f is either an electron, muon, or charged pion, at square-root s = 29 GeV using the Mark II detector at the SLAC storage ring PEP. One candidate event is found while 2.3 events are expected from known processes, We would expect to see 11 events if the cross section for e+ e- --> tau+ tau- ffBAR at square-root s = 29 GeV were enhanced by the factor of 4.7 which the ALEPH Collaboration reports for square-root s = 91 GeV. We also look for e+ e- --> e+ e- --> ffBAR and e+ e- --> mu+ mu- ffBAR, and for e+ e- --> tau+ tau- gamma, using a similar analysis procedure, and see the number of events predicted by the standard model.