Search for Heavy Leptons at Hadron Colliders.pdfVIP

IFP-439-UNC TRI-PP-92-97 WM-92-111 October 1992 SEARCH FOR HEAVY LEPTONS AT HADRON COLLIDERS Paul H. Frampton(a) , Daniel Ng(b) , 2 9 Marc Sher(c) and Yao Yuan(c) 9 1 (a) Institute of Field Physics, Department of Physics and Astronomy t c O University of North Carolina, Chapel Hill, NC 27599-3255 8 (b) TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C. V6T 2A3, Canada 2 1 (c) Department of Physics, College of William and Mary, Williamsburg, VA 23187 v 0 7 2 0 1 2 Four models are considered which contain heavy leptons beyond the three families 9 / h of the standard model. Two are fourth-generation extensions of the standard model p p- in which the right-handed heavy leptons are either isosinglets or in an isodoublet; e h the other two are motivated by the aspon model of CP violation. In all these models, : v i the heavy neutrino can either be heavier than, or comparable in mass to, the charged X r lepton leading to the possibility that the charged lepton is very long-lived. Production a cross section and signatures for the heavy leptons are computed for the SSC and LHC. 1 I. INTRODUCTION Since the accurate measurement of the parameters of Z0 decay [1], it has been known that there exist only three light neutrinos, ν , ν and ν , coupling to the Z0 in the manner