Experimental Study of Heavy Charged Leptons and Search for Scalar Partners of Muons at PETRA (12 GeV&lt;~<i>E</i>_c.m.&lt;~36.7 GeV)

Abstract

Data from the MARK-J detector on the reactions e+ep, +p, 7.+7 in the center-of- mass energy range from 12 to 36.7 GeV are presented.The p, 7. radii are shown to be &10 '6 cm.A search has been made for the production of a new heavy lepton and for the production of spin-0 supersymmetric partners of the muon.95%-confidence-level lower limits of 16 GeV for the mass of a new charged heavy lepton and 15 GeV for the mass of the scalar partners of the muon are obtained.