An Upper Limit For The Tau-Neutrino Mass From Tau -> 5 Pi(+/-)Nu(Tau) Decays

K Ackerstaff,G Alexander,J Allison,N Altekamp,Kj Anderson,S Anderson,S Arcelli,S Asai,Sf Ashby,D Axen,G Azuelos,Ah Ball,E Barberio,Rj Barlow,R Bartoldus,Jr Batley,S Baumann,J Bechtluft,T Behnke,Kw Bell,G Bella,S Bentvelsen,S Bethke,S Betts,O Biebel,A Biguzzi,Sd Bird,V Blobel,Ij Bloodworth,M Bobinski,P Bock,J Bohme,M Boutemeur,S Braibant,P Bright-Thomas,Rm Brown,Hj Burckhart,C Burgard,R Burgin,P Capiluppi,Rk Carnegie,Aa Carter,Jr Carter,Cy Chang,Dg Charlton,D Chrisman,C Ciocca,Pel Clarke,E Clay,I Cohen,Je Conboy,Oc Cooke,C Couyoumtzelis,Rl Coxe,M Cuffiani,S Dado,Gm Dallavalle,R Davis,S De Jong,La Del Pozo,A De Roeck,K Desch,B Dienes,Ms Dixit,M Doucet,J Dubbert,E Duchovni,G Duckeck,Ip Duerdoth,D Eatough,Pg Estabrooks,Hg Evans,F Fabbri,A Fanfani,M Fanti,Aa Faust,F Fiedler,M Fierro,Hm Fischer,I Fleck,R Folman,A Furtjes,Di Futyan,P Gagnon,Jw Gary,J Gascon,Sm Gascon-Shotkin,C Geich-Gimbel,T Geralis,G Giacomelli,P Giacomelli,V Gibson,Wr Gibson,Dm Gingrich,D Glenzinski,J Goldberg,W Gorn,C Grandi,E Gross,J Grunhaus,M Gruwe,Gg Hanson,M Hansroul,M Hapke,Ck Hargrove,C Hartmann,M Hauschild,Cm Hawkes,R Hawkings,Rj Hemingway,M Herndon,G Herten,Rd Heuer,Md Hildreth,Jc Hill,Sj Hillier,Pr Hobson,A Hocker,Rj Homer,Ak Honma,D Horvath,Kr Hossain,R Howard,P Huntemeyer,P Igo-Kemenes,Dc Imrie,K Ishii,Fr Jacob,A Jawahery,H Jeremie,M Jimack,A Joly,Cr Jones,P Jovanovic,Tr Junk,D Karlen,V Kartvelishvili,K Kawagoe,T Kawamoto,Pi Kayal, Re Keeler,Rg Kellogg,Bw Kennedy,A Klier,S Kluth,T Kobayashi,M Kobel,Ds Koetke,Tp Kokott,M Kolrep,S Komamiya,Rv Kowalewski,T Kress,P Krieger,J Von Krogh,P Kyberd,Gd Lafferty,D Lanske,J Lauber,Sr Lautenschlager,I Lawson,Jg Layter,D Lazic,Am Lee,E Lefebvre,D Lellouch,J Letts,L Levinson,R Liebisch,B List,C Littlewood,Aw Lloyd,Sl Lloyd,Fk Loebinger,Gd Long,Mj Losty,J Ludwig,D Lui,A Macchiolo,A Macpherson,M Mannelli,S Marcellini,C Markopoulos,Aj Martin,Jp Martin,G Martinez,T Mashimo,P Mattig,Wj Mcdonald,J Mckenna,Ea Mckigney,Tj Mcmahon,Ra Mcpherson,F Meijers,S Menke,Fs Merritt,H Mes,J Meyer,A Michelini,S Mihara,G Mikenberg,Dj Miller,R Mir,W Mohr,A Montanari,T Mori,K Nagai,I Nakamura,Ha Neal,B Nellen,R Nisius,Sw O'Neale,Fg Oakham,F Odorici,Ho Ogren,Mj Oreglia,S Orito,J Palinkas,G Pasztor,Jr Pater,Gn Patrick,J Patt,R Perez-Ochoa,S Petzold,P Pfeifenschneider,Je Pilcher,J Pinfold,De Plane,P Poffenberger,B Poli,J Polok, M Przybzien,C Rembser,H Rick,S Robertson,Sa Robins,N Rodning,Jm Roney,K Roscoe,Am Rossi,Y Rozen,K Runge,O Runolfsson,Dr Rust,K Sachs,T Saeki,O Sahr,Wm Sang,Ekg Sarkisyan,C Sbarra,Ad Schaile,O Schaile,F Scharf,P Scharff-Hansen,J Schieck,B Schmitt,S Schmitt,A Schoning,T Schorner,M Schroder,M Schumacher,C Schwick,Wg Scott,R Seuster,Tg Shears,Bc Shen,Ch Shepherd-Themistocleous,P Sherwood,Gp Siroli,A Sittler,A Skuja,Am Smith,Ga Snow,R Sobie,S Soldner-Rembold,M Sproston,A Stahl,K Stephens,J Steuerer,K Stoll,D Strom,R Strohmer,R Tafirout,Sd Talbot,S Tanaka,P Taras,S Tarem,R Teuscher,M Thiergen,Ma Thomson,E Von Torne,E Torrence,S Towers,I Trigger,Z Trocsanyi,E Tsur,As Turcot,Mf Turner-Watson,R Van Kooten,P Vannerem,M Verzocchi,P Vikas,H Voss,F Wackerle,A Wagner,Cp Ward,Dr Ward,Pm Watkins,At Watson,Nk Watson,Ps Wells,N Wermes,Js White,Gw Wilson,Ja Wilson,Tr Wyatt,S Yamashita,G Yekutieli,V Zacek,D Zer-Zion

EUROPEAN PHYSICAL JOURNAL C（1998）

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Abstract

An upper limit for the tau-neutrino mass has been determined from the decay tau --> 5 pi(+/-)nu(tau) using data collected with the OPAL detector from 1991 to 1995 in e(+)e(-) collisions at root s approximate to M-Z. A limit of 43.2 MeV at 95% CL is obtained using a two-dimensional method in the 5 pi invariant mass and energy distribution from 22 selected events. Combining this result with OPAL's previously published measurement using tau(+)tau(-) --> 3h+/-<(nu)over bar>(tau) + 3h(-/+)nu(tau) decays, a new combined limit of m(nu tau) < 27.6 MeV (95% CL) is obtained.

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