Events with large missing transverse energy at the cern collider: I.W→ τν decay and test of τ μe universality at Q2= mw2

C Albajar ,H Von Der Schmitt,M Della Negra,C Bacci,I Sheer,D Pascoli,M.-N Minard,L Naumann,D Linglin,C Rubbia,A Placci,S Centro,M Moricca,G Busetto,M Corden,G Bauer,J Garvey,D Pitman,G Salvini,R Leuchs,I Zacharov,E Buckley,A Astbury,D Schinzel,A Wildish,L Gately,C Pigot,H Grassmann,G Sajot,A Geisser,P Petta,D Dau,M Pincke-Keeler,M Markytan,P Cennini,W Von Schlippe,F Ghio,E Eisenhandler,K Wacker,G Ciapetti,M Degiorgi,I Siotis,P Colas,E Pietarinen,R Frey,C Zaccardelli,L Zanello,E Radermacher,W Jank,J Sass,A Diciaccio,B Mours,C Markou,E Tscheslog,N Bains,M Debeer,S Tether,M Pimiä,S Geer,C Perault,K Bos,G Bunce,K Eggert,G Piano Mortari,V Vuillemin,B Van Eijk,M Yvert,S Beingessner,W Kienzle,D Kryn,I Ten Have,P Kyberd,J Dorenbosch,M Jimack,J Streets,T Redelberger,A Gonidec,G Jorat,A Kernan,H Faissner,P Catz,M Demoulin,Paolo Rossi ,Hans Hoffmann ,C Tao ,Isabelle Wingerter ,P Nédélec ,W Rühm ,P I P Kalmus ,E Locci ,P Sphicas ,M Ikeda ,B Aubert ,K Morgan ,M E Levi ,Phil Flynn ,R Sobie ,M Albrow ,R Frühwirth ,H G Moser ,D Gee ,A Honma ,X Wu ,G Fontaine ,T Markiewicz ,B Denby ,J R Batley ,D Smith ,A Givernaud ,D Denegri ,Y Giraud‐Héraud ,A Taurok ,J P Mendiburu ,D Holthuizen ,D Summers ,A Khan ,O C Allkofer ,J Strauss ,S Li ,P Erhard ,M Mohammadi ,W.j Haynes ,J P Laugier ,J Bellinger ,P Giacomelli ,T C Meyer ,T Virdee ,H D Wahl ,E Duchovni ,J D Dowell ,S J Haywood ,S Wimpenny ,R Keeler ,K Sumorok ,I F Fensome ,R J Homer ,I R Kenyon ,L Dobrzyński ,D G Charlton ,J.-P Merlo ,A T Meneguzzo ,R Edgecock ,J A Wilson ,T Shah ,W R Gibson ,A Norton ,C Stubenrauch ,W G Scott ,J P Lees ,S Levegrün ,J A Coughlan ,C Cochet ,D Samyn ,J P Revol ,F Ceradini ,Ph Ghez ,A J Schwartz ,V Karimäki ,J Tuominiemi ,H Reithler ,F Szoncsó ,N Ellis ,M Krammer ,A Bézaguet ,J P Porte ,J Colás ,J Kroll ,D Cline ,J Richman ,C Seez ,T Axon ,D Robinson ,Th Müller ,T R Wyatt ,J.p Vialle ,N Zaganidis ,G Arnison ,D Clarke ,F Lacava ,L Villaseñor ,K Long ,C.-E Wulz ,C Ghesquière ,E Petrolo ,J Vrána ,R Kinnunen ,G Thompson ,P M Watkins ,A Bettini ,J Rohlf ,G Grayer ,G Maurin ,S Cittolin ,A Savoy-Navarro ,J P Debrion ,A Nandi ,F Pauß ,G Cox ,T C Bacon ,P Zotto

doi:10.1016/0370-2693(87)91561-9

Events with large missing transverse energy at the cern collider: I.W→ τν decay and test of τ μe universality at Q2= mw2

C Albajar , H Von Der Schmitt + Show 198 more

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https://doi.org/10.1016/0370-2693(87)91561-9

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Journal: Physics Letters B	Publication Date: Feb 1, 1987
Citations: 64

Affiliation: European Organization for Nuclear Research, Rutherford Appleton Laboratory, Sapienza University of Rome, University of Padua, Queen Mary University of London, Laboratoire d'Annecy-le-Vieux de Physique Théorique, Princeton Plasma Physics Laboratory, Harvard University, University of Wisconsin–Madison, University of California, Riverside, University of Victoria, Imperial College London, RWTH Aachen University, Kiel University, University of Birmingham, National Institute for Subatomic Physics, Collège de France, Massachusetts Institute of Technology

#Large Missing Transverse Energy #CERN Proton-antiproton Collider + Show 8 more

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Abstract

We report results based on a sample of events with large missing transverse energy corresponding to 715 nb −n of data from the UA1 experiment at the CERN proton-antiproton collider. High transverse-momentum tau-leptons from W decays are observed for the first time through their semi-hadronic decay modes and associated missing transverse energy. The measured relative rates of W→e ν, W→ μν, and W→ τν provide the first direct tests of the electron-muon-tau universality of the weak charged couplings at Q 2= m w 2. We determine g τ g e =1.01±0.09±0.05 and g μ g e =1.05±0.07±0.08 .

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