A search for new leptons

H. -J. Behrend, J. Bürger, L. Criegee,J. B. Dainton,J. H. Field,G. Franke,H. Jung,J. Meyer,V. Schröder, U. Timm,G. G. Winter,W. Zimmermann,P. J. Bussey,C. Buttar,A. J. Campbell, D. Hendry, G. McCurrach,J. M. Scarr,I. O. Skillicorn,K. M. Smith,J. Ahme, V. Blobel, M. Feindt, H. Fenner,J. Harjes,J. H. Peters,M. Poppe,H. Spitzer,W. -D. Apel,A. Böhrer, J. Engler, G. Flügge,D. C. Fries, J. Fuster, K. Gamerdinger, P. Grosse-Wiesmann,J. Hansmeyer, G. Hopp,J. Knapp,M. Krüger,H. Küster,P. Mayer,H. Müller,K. H. Ranitzsch,H. Schneider,J. Wolf,W. de Boer, G. Buschhorn, G. Grindhammer,B. Gunderson,Ch. Kiesling, R. Kotthaus, H. Kroha, D. Lüers, H. Oberlack, P. Schacht, S. Scholz, G. Shooshtari, W. Wiedenmann,M. Davier,J. -F. Grivaz,J. Haissinski,P. Janot, V. Journé, Kim D. W. ,F. Le Diberder, A. Spadafora,J. -J. Veillet, K. Blohm,R. George,M. Goldberg,O. Hamon,F. Kapusta,F. Kovacs, L. Poggioli, M. Rivoal,G. d'Agostini, F. Ferrarotto,M. Gaspero,B. Stella, R. Aleksan, G. Cozzika,Y. Ducros, P. Jarry, Y. Lavagne,F. Ould Saada,F. Pierre, J. Záček, G. Alexander,G. Bella, Y. Gnat, J. Grunhaus, A. Klatchko,A. Levy,C. Milsténe

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS（1988）

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摘要

A search for new leptons, charged and neutral, produced ine+e− collisions at an average c.m. energy of 44.2 GeV, has been carried out with the CELLO detector at PETRA. No such particles have been observed: we exclude pair production of new charged leptons at the 95% C.L. in the mass range 1.5–22.0 GeV/c2 and of neutral leptons in the mass range 3.1–18.0 GeV/c2. Single production of a heavy neutrino together with a standard neutrino has also been studied; we exclude an electron-like neutral lepton in the mass ranges 0.6–34.6 GeV/c2 forV—A coupling to theW boson, and 0.4–37.4 GeV/c2 forV+A coupling.

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关键词

Field Theory,Elementary Particle,Quantum Field Theory,Mass Range,Pair Production

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