Search For Excited Leptons In E(+)E(-) Annihilation At Root S=130-140 Gev
M. Acciarri,A. Adam,O. Adriani,M. Aguilar-Benitez,S. Ahlen,B. Alpat,J. Alcaraz,J. Allaby, A. Aloisio,G. Alverson,M.G. Alviggi,G. Ambrosi,H. Anderhub,V.P. Andreev,T. Angelescu,D. Antreasyan, A. Arefiev,T. Azemoon,T. Aziz, P. Bagnaia,L. Baksay, R.C. Ball,S. Banerjee,K. Banicz,R. Barillère, L. Barone, P. Bartalini, A. Baschirotto,M. Basile,R. Battiston, A. Bay, F. Becattini,U. Becker,F. Behner,Gy.L. Bencze,J. Berdugo,P. Berges,B. Bertucci,B.L. Betev, M. Biasini,A. Biland,G.M. Bilei,J.J. Blaising,S.C. Blyth,G.J. Bobbink,R. Bock,A. Böhm,B. Borgia,A. Boucham,D. Bourilkov,M. Bourquin, D. Boutigny,E. Brambilla,J.G. Branson,V. Brigljevic,I.C. Brock,A. Buijs,A. Bujak,J.D. Burger,W.J. Burger,C. Burgos,J. Busenitz,A. Buytenhuijs,X.D. Cai,M. Campanelli,M. Capell,G. Cara Romeo,M. Caria,G. Carlino,A.M. Cartacci,J. Casaus,G. Castellini,R. Castello, F. Cavallari,N. Cavallo,C. Cecchi,M. Cerrada,F. Cesaroni,M. Chamizo,A. Chan,Y.H. Chang,U.K. Chaturvedi,M. Chemarin,A. Chen,C. Chen,G. Chen,G.M. Chen,H.F. 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PHYSICS LETTERS B（1996）
引用 26|浏览234
摘要
We report on a search for the excited leptons e*, mu*, tau* and nu* in e(+)e(-) collisions at root s = 130-140 GeV using the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected pair produced l*l* in the channels ee gamma gamma, mu mu gamma gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, We determine the lower mass limits at 95% C.L. of 64.7 GeV for e*, 64.9 GeV for mu*, 64.2 GeV for tau*, 57.3 GeV (eW decay mode) and 61.4 GeV (nu gamma decay mode) for nu*. From an analysis of the expected singly produced ll* in the channels ee gamma, mu mu gamma, tau tau gamma, nu eW and nu nu gamma, we determine upper limits on the couplings lambda/m(l*) up to m(l*) = 130 GeV.
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