Measurement of W-pair cross sections in e+e− interactions at =172 and W-decay branching fractions

M Acciarri,T Paul,N Shivarov,P Levtchenko,Y Karyotakis,D Van Dierendonck,A Favara,G Carlino,S Easo,J Schwenke,D Della Volpe,J Alcaraz,J Salicio,C Lapoint,L Fredj,F Ziegler,S Reucroft,I Korolko,R Faccini,T Moulik,A Button,J Berdugo,M Pauluzzi,A Gurtu,D Kirkby,I Vetlitsky,H Tuchscherer,A Pevsner,V Shoutko,W Wallraff,T Azemoon,H Postema,M Napolitano,A Gougas,Y Uchida,W Krenz,T Angelescu,H Vogt,Yu Kamyshkov,A Engler,S Wynhoff,P Bartalini,W Van Rossum,E Fiandrini,Ph Rosselet,U Uwer,G Rahal-Callot,R De Asmundis,P Zemp,P Duinker,F Denotaristefani,A Kunin,K Jenkes,B De La Cruz,A Kasser,A Barczyk,A Kirkby,G Landi,F Cotorobai,M Vivargent,M Sassowsky,M Rescigno,C Furetta,V Plyaskin,M Chamizo,P Marchesini,G Alemanni,M Rattaggi,F Behner,S Pensotti,K Banicz,P Berges,E Shumilov,D Dibitonto,P Schmitz,M Capell,A Lebedev,M Von Der Mey,S Shevchenko,F Wittgenstein,B Fenyi,A Buffini,I Josa-Mutuberria,F Ferroni,M Lebeau,L Servoli,R Leiste,H Nowak,B Bertucci,D Ren,S Banerjee,L Tauscher,A Chen,A Hasan,N Scholz,G Schwering,A Degré,P Extermann,Yu Galaktionov,F Anselmo,G Viertel,G Hu,C Dionisi,A Böhm,Y Zeng,J Rodin,K Riles,W Kittel,R Ostonen,G Chiefari,D Peach,F Di Lodovico,A Buijs,G Raven,D Duchesneau,R Völkert,H Hofer,N Gheordanescu,E Valente,S Schmidt-Kaerst,D Hatzifotiadou,D Kamrad,T Siedenburg,M Bourquin,O Adriani,M Chemarin,J Ulbricht,J Busenitz,L Baksay,N Raja,G Ambrosi,E Pistolesi,M Steuer,D Mcnally,S Costantini,M Wadhwa,P Laurikainen,G Mirabelli,V Commichau,K Freudenreich,S Patricelli,D Kiss,D Luckey,A Robohm,A Arefiev,D Ruschmeier,L Romero,I Clare,B Monteleoni,G Coignet,U Becker,D Sciarrino,A Vorvolakos,H Anderhub,F Marzano,V Pojidaev,T Van Rhee,S Morganti,M Tonutti,K Strauch,A Bay,D Pandoulas,B Borgia,S Petrak,A Shvorob,P Le Coultre,B Hartmann,A Nippe,M Basile,C Palomares,G Castellini,V Koutsenko,K Lübelsmeyer,J Casaus,G Cara Romeo,G Passaleva,H El Mamouni,K Sudhakar,P Lebrun,F Cavallari,B N Jin ,S Hou ,J M You ,H Suter,E Longo,L Z Sun ,R D’alessandro ,Virendra K Gupta ,S X Wu ,C G Yang ,H.K Park,P A Razis ,B.P Roe,T Aziz,Samuel C.C Ting,C Luci,G Organtini,P De Jong,H O Cohn ,L Merola,D Prokofiev,P Ladrón De Guevara ,G Hamel De Monchenault ,S M Ting ,S N Ganguli ,Michel Fabre ,W J Metzger ,P Denes,L Boldizsár ,Stefan Roth ,R Y Zhu ,Sachin Kumar Mangla ,Z F Gong ,Y S Lu ,I Durán ,L Barone,B Stoyanov,S J Hong ,V Brigljević ,X W Tang ,S Mele,H Vogel,H.S Chen,J M Le Goff ,S Chekanov ,P Piroué ,A Nisati,Z.A Liu,W J Burger ,H Schopper,V Innocente,C Tully,S Riemann,F Cindolo,S.C Kim,N Cavallo,C Mañá ,S Paoletti,C Paus,S C Yeh ,J Kapustinsky ,M Pieri,Y V Efremenko ,M Cerrada,Y.G Kim,I C Brock ,U K Chaturvedi ,P Bagnaia,R Clare,M Kaur,Gennaro De Pascale ,A Straessner,D Piccolo,H B Newman ,M Diemoz,M Campanelli,G Massaro ,T Ferguson,H R Hoorani ,L Malgeri,K L Tung ,T Nießen ,T Hebbeker,Xiaojun Yao ,O L Fedin ,J D Burger ,A Doria,D Stickland ,M N Kienzle‐Focacci ,B.L Betev,А Малинин ,K Lassila-Perini,L Luminari,J Allaby,A Stone,N Produit,B A Petersen ,A A Vorobyov ,S Blyth ,Y J Pei ,J.-P Ernenwein ,M Meschini,A J.w Van Mil ,P Paolucci,J.K Kim,J Swain ,M Dittmar,Z Zhang,R W Kraemer ,S Müller,S Nahn,S Gentile,P Lecomte,S Goldfarb,M E Sarakinos ,J Goldstein,S Sopczak,G Forconì ,J C Pinto ,J Xu,R Mount,F Pauß ,A Klimentov,R T Van De Walle ,J.C Wang,F Cesaroni,D Kim,Y H Chang ,H Fesefeldt,M Maity,B Zhou,W C Van Hoek ,G Majumder,J.B Ye,П Спиллантини ,I B Laktineh ,D Mangeol,P H Fisher ,A P Colijn ,F Muheim,S Dutta,V Andreev ,W Lin ,R Moore,W Lu,J P Martin ,A J.m Muijs ,R Battiston,M P Sanders ,K Deiters,W Lustermann,J Mnich,A Mihul,R R Mcneil ,A K Kopp ,W W Kinnison ,J A Rubio ,G.M Chen,P.G Rancoita,R Böck ,G Vesztergombi,G Gratta,K F Read ,Péter Molnár ,D Bourilkov,G M Bilei ,M Pohl,Herwart Opitz ,M G Alviggi ,D.H Kim,A M Cartacci ,A Hervé,D Schmitz,R A Khan ,M W Gruenewald ,L Lista,A Marín ,C Schäfer,L W Jones ,Yong Mei ,Y Zalite ,F Nessi‐Tedaldi ,N Colino,B Z Yang ,Howard A Stone ,S S Gau ,J J Blaising ,S Braccini,M Felcini,F Becattini,L Taylor,J Shukla,G Chen,D J Schotanus ,I Fisk,M Biasini,J Kirkby,S Falciano,X.L Wang,J Tóth,S Rosier‐Lees ,L Gutay ,V A Schegelsky ,Z.M Wang,A Zalite ,S Sarkar,G Sultanov,J H Field ,A Baschirotto,Ma Wen-Gan ,Á Csilling ,C Li,A Zichichi,M Aguilar-Benı́tez ,F.C Erné,T Dai ,G Y Zhu ,F.L Linde,Y D Oh ,J G Branson ,S C Tonwar ,A Biland,G J Bobbink ,P Garcı́a-Abia ,M T Dova ,C Cecchi,F J Eppling ,E Sánchez ,D Perret-Gallix,X D Cai ,H Rykaczewski,Bryan Smith ,X Chéreau ,F Filthaut,H.F Chen,G Susinno ,Emanuele Leonardi ,A Dominguez,S P Ahlen ,W Lohmann,P Lecoq,J Fay,C Y Chien ,C H Lin ,A C König ,A Aloisio,D Son,I Vorobiev,R Barillère,C Sciacca,C Civinini,Z.P Zhang,I.H Park,Z Xu ,A Weber,S Giagu,Saptaparna Bhattacharya ,L Cifarelli

doi:10.1016/s0370-2693(97)00802-2

Measurement of W-pair cross sections in e+e− interactions at =172 and W-decay branching fractions

M Acciarri, T Paul + Show 436 more

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https://doi.org/10.1016/s0370-2693(97)00802-2

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Journal: Physics Letters B	Publication Date: Sep 1, 1997
Citations: 10	License type: cc-by-nc-nd

Affiliation: Northeastern University, Bulgarian Academy of Sciences, Laboratoire d'Annecy-le-Vieux de Physique des Particules, University of Amsterdam, University of Perugia, RWTH Aachen University, European Organization for Nuclear Research, Massachusetts Institute of Technology, University of Geneva, Tata Institute of Fundamental Research, University of Michigan–Ann Arbor, California Institute of Technology, University of Alabama, Johns Hopkins University, University of Bucharest, Oak Ridge National Laboratory, Carnegie Mellon University, Utrecht University, University of Lausanne, ETH Zurich, Purdue University West Lafayette, University of Basel, University of Cyprus, Radboud University Nijmegen, University of Helsinki, University of California, San Diego, Claude Bernard University Lyon 1, Humboldt-Universität zu Berlin, Hungarian Academy of Sciences, Harvard University

#Cross Section For W-pair Production #High Invariant Masses + Show 8 more

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Abstract

Abstract We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb−1 we select 110 four-fermion events with pairs of hadronic jets or leptons with high invariant masses. Branching fractions of W decays into different fermion-antifermion pairs are determined with and without the assumption of charged-current lepton universality. The branching fraction for hadronic W decays is measured to be: B(W → hadrons) = 64.2−3.8+3.7 (stat.) ± 0.5 (syst.) %. Combining all final states the total cross section for W-pair production is measured to be: σWW = 12.27−1.32+1.41 (stat.) ± 0.23 (syst.) pb. The results are in good agreement with the Standard Model.

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