Search for excited spin-3/2 and spin-1/2 leptons at linear colliders
O. \c{C}akir and A. Ozansoy

We study the single production of excited spin-3/2 and spin-1/2 leptons in future high energy $e^{+}e^{-}$ collisions. We calculate the production cross section and decay widths of excited spin-3/2 and spin-1/2 leptons according to their effective currents. We show that these possible new excited states can be probed up to the mass $m^{\ast}\sim\sqrt{s}$ depending on their couplings to leptons and gauge bosons. We present the angular distributions of final state particles as a measure to discriminate between an excited spin-3/2 and spin-1/2 lepton signal. The signals and the corresponding backgrounds are studied in detail to obtain attainable limits on masses and couplings of excited leptons at future linear colliders.

© 2008 The American Physical Society.