We report on a search for the pair production of leptoquarks and colored leptons in e+e- annihilations t center-of-mass energies from 50 to 60.8 GeV, using the AMY detector at TRISTAN. No evidence for such particles is found and 95% CL mass limits are given.
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WE thank the TRISTAN staff for the excellent operation of the storage ring. In addition, we acknowledge the strong support and enthusiastic assistance provided by the staffs of our home institutions. This work has been supported by the Japan Ministry of Education, Science and Culture (Monbusho), the US Department of Energy and National Science Foundation, the Korean Science and Engineering Foundation and Ministry of Education, and the Academia Sinica of the People's Republic of China.