Search for excited leptons at LEP

M Z Akrawy ,L Köpke,P Scharff-Hansen,U Binder,B Holl,M Jimack,H Kreutzmann,P Farthouat,H Von Der Schmitt,D Granite,M Hauschild,J Von Krogh,F Lamarche,H Ihssen,P Mättig,A Shapira,T Behnke,P Kyberd,G Knop,D Hochman,S Weisz,J Gascon,R Kowalewski,M Jobes,A Pouladdej,M Weymann,G Maringer,G Vasseur,S Rossberg,A Rollnik,F Odorici,T Kawamoto,D Menszner,R Yaari,P Lennert,M Regimbald,M Hansroul,M Couch,E Heflin,J Ludwig,A Gaidot,H Mes,W Gorn,B Poli,M Sproston,P Routenburg,T Kobayashi,J Goldberg,W Mohr,M Coupland,H El Mamouni,A Dieckmann,G Tysarczyk-Niemeyer,D Van Den Plas,P Bock,A Michelini,M Ogg,B Nellen,I Cohen,K Runge,D Karlen,P Pfister,K Riles,B Lorazo,K Stephens,G Giacomelli,J Grunhaus,P Leblanc,M Kuwano,P Ashton,L Lessard,W Schappert,P Debu,A Buijs,J Raab,U Maur,S Orito,V Gibson,J Hagemann,A Jawahery,S Sanghera,G Yekutieli,C Wahl,O Ganel,T Tsukamoto,R G Kellogg ,E Gross ,D Strom ,H E Stier ,C Y Chang ,M Mannelli ,T Mäshimo ,J E Conboy ,J Schwarz ,A Montanari ,A D Schaile ,Takashi Yoshida ,M S Dixit ,P G Estabrooks ,I J Bloodworth ,M Deninno ,M Sasaki ,R J Homer ,F X Gentit ,A A Macbeth ,P W Jeffreys ,D L Rees ,C Ho ,S W Gensler ,K Kawagoe ,F Meijers ,I P Duerdoth ,John C Armitage ,S J Hillier ,F G Oakham ,Isabelle Wingerter ,A C Mcpherson ,G Arnison ,P Capiluppi ,R P Middleton ,C J Virtue ,L Levinson ,G P Siroli ,J P Pansart ,Ö Runólfsson ,S Bethke ,R Brun ,R Ströhmer ,M Nozaki ,T J Smith ,M Cuffiani ,G Alexander ,C P Ward ,S Marcellini ,D R Ward ,J.r Carter ,M W Redmond ,F S Merritt ,W J Larson ,M W Moss ,M J Losty ,K J Anderson ,G Vandalen ,P Igo‐Kemenes ,S Dado ,J C Hart ,P Sherwood ,J Waterhouse ,C Kleinwort ,J T Baines ,G N Patrick ,A T Watson ,B J Saunders ,N C Wood ,J C Hill ,J M Lorah ,D J.p Dumas ,A Rossi ,R D Heuer ,M J Oreglia ,G M Dallavalle ,F K Loebinger ,J Kroll ,D E Klem ,R J Barlow ,B W Kennedy ,A Simon ,R E Hughes-Jones ,P Le Dû ,J A Wilson ,S A Wotton ,J W Gary ,A M Smith ,S W O’neale ,C M Roach ,P M Watkins ,H Oh ,Roger Jones ,D E Plane ,W J Collins ,J Allison ,G A Snow ,N I Geddes ,T R Wyatt ,J M Roney ,C Milstène ,D Lellouch ,J D Gillies ,M J Goodrick ,V H Winterer ,M T French ,A Wagner ,S Schreiber ,G W Wilson ,E J Spreadbury ,A.a Carter ,N Lupu ,G J Barker ,N K Watson ,G Mikenberg ,P G Murphy ,H Breuker ,S Hou ,A Martín ,J P Martín ,A.m Lee ,H Hagedorn ,F Fabbri ,N Wermes ,C P Howarth ,J G Layter ,Y C Yang ,J Hobbs ,S L Lloyd ,C M Hawkes ,G D Lafferty ,J Chrin ,E Etzion ,H Jérémie ,T Mori ,S A Robins ,B C Shen ,G Bella ,P Jovanović ,R K Carnegie ,G Quast ,P A Elcombe ,C Fukunaga ,B P O'neill ,M Minowa ,W R Gibson ,H Burckhart ,D C Imrie ,A Skuja ,W J Murray ,P Grosse‐Wiesmann ,R W Springer ,R A Sansum ,David Charlton ,D J Miller ,S J Pawley ,R M Brown ,T Takeshita ,J Becker ,D G Fong ,B J Wuensch ,Hiroshi Takeda ,M Turner ,P P Allport ,M Dittmar ,C K Hargrove ,W D Zeuner ,A J.p O'dowd ,R J Hemingway ,Thomas J Mcmahon ,J E Pilcher ,Ch Geich-Gimbel ,J R Batley ,O Biebel ,E Duchovni ,J Ma ,J L Pinfold ,J Banks ,K W Bell ,T W Pritchard ,P M Hattersley ,P R Hobson ,M Weber ,H M Fischer ,T P Kokott ,P Singh ,H H Nguyen ,C N P Gee ,A H Ball ,G Azuelos ,G T Zorn

doi:10.1016/0370-2693(90)90283-c

Search for excited leptons at LEP

M Z Akrawy , L Köpke + Show 274 more

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https://doi.org/10.1016/0370-2693(90)90283-c

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Journal: Physics Letters B	Publication Date: Jul 1, 1990
Citations: 25	License type: mit

Affiliation: Queen Mary University of London, Tel Aviv University, University of Manchester, Université de Montréal, Heidelberg University, Fermi National Accelerator Laboratory, University of Chicago, University of Freiburg, European Organization for Nuclear Research, Rutherford Appleton Laboratory, Carleton University, Cavendish Hospital, University of Maryland, College Park

#Excited Leptons #Search For Excited Leptons + Show 5 more

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Abstract

Excited leptons have been searched for using data recorded by the OPAL detector at LEP. No evidence for such particles has been found. From the study of e +e − → ℓ +ℓ − γγ events, lower limits on the masses of spin- 1 2 excited leptons are found to be 44.9 GeV at 95% confidence level. From the study of e +e − →ℓ +ℓ − γ events, upper limits on their couplings are set up to ℓ ∗ masses close to the mass of the Z 0 boson.

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