FIRST MEASUREMENT OF THE LEFT-RIGHT ASYMMETRY IN Z-BOSON PRODUCTION

Kenji Abe ,G Putallaz,L Servoli,T Bienz,M Settles,Y Iwasaki,D P Gurd,P Rankin,A Szumilo,R Verdier,R De Sangro,A Seiden,V Ashford,R Messner,V Cook,L Piemontese,M H Shaevitz,R Dubois,A Sugiyama,M Turcotte,N Toge,T Maruyama,A W Weidemann,F Toevs,T Fieguth,D Su,T Schalk,T E Browder,M D Woodly,M Pauluzzi,R J Morrison,I E Stockdale,U Nauenberg,B N Ratcliff,S Bougerolle,M Nussbaum,S A Wickert,M Langston,L Mathys,G D Punkar,B I Eisenstein,H Yuta,G B Word,D Horelick,G Eigen,N Phinney,G M Bilei,C C Young,D Pripstein,H R Band,D O Caldwell,C Simopoulos,C Fan,D J Sherden,R Prepost,G Oxoby,R Pitthan,J E Brau,C Alber,A Calcaterra,R C Hilomen,R Elia,E Vella,A O Bazarko,D A Forbush,G Mancinelli,H Park,A Astbury,J E Duboscq,R K Yamamoto,M D Sokoloff,P E L Clarke,O Bardon,F Suekane,L Pescara,R Rinta,D Cords,M Loreti,I Abt,M Piccolo,D G Hitlin,B Camanzi,D Aston,I Karliner,T Gillman,C Vannini,S Manly,S S Hertzbach,J J Thaler,C Baltay,M Petradza,R W Zdarko,H L Lynch,W Craddock,R Cotton,E L Hart,S Hedges,T H Burnett,F Bird,D Kharakh,M Tecchio,L Lintern,L Rosenson,G Blaylock,W W Ash,G B Chadwick,W Dunwoodie,R S Panvini,A Lu,J Harrison,T Limberg,A P Waite,D Calloway,A Gioumousis,G Tarnopolsky,M Carpinelli,U Schneekloth,R Frey,I Camilleri,H Kawahara,T Nagamine,E Erdos,R Kajikawa,J Wyss,P Antilogus,R H Schindler,E Mazzucato,J F Labs,F Dejongh,P De Simone,R Ossa,P C Rowson,B Mours,K M Fortune,A Disco,S Mchugh,C Jako,L Paffrath,M Kalelkar,T W Reeves,K Skarpaas,P D Acton,A Snyder,R Claus,G Mazaheri,M Woods,O H Saxton,A Shoup,J M Yamartino,D Nelson,G Haller ,D.w.g.s Leith ,A P.t Palounek ,G Tappern ,A Rothenberg,G R Mundy ,M Gallinaro,Stephen Jones ,N.m Krishna ,C.j Oram ,R Watt,R R Larsen ,T Lyons,Y.-J Kwon ,Shouta Suzuki ,W.l Spence ,T Himel ,R Kroeger ,S Cartwright,E Spencer ,W Emmet ,S Shapiro ,R.k Jobe ,J Turner ,H W Tang ,H.o Cohn ,J T Shank,A C Benvenuti,Rob Johnson ,J Rothberg ,Robert W Downing ,D Durrett ,R Castaldi,Volker Ziemann ,J A Coller,P Stamer,M Minty,P Krejcik,John A Hodgson ,Y Au,S Yellin ,J Richman ,D J Mellor,J J Russell,M Schneider,J Zhou,H Steiner,Jonathan M Flynn ,J Olsen,A K Honma ,Frédéric Perrier ,J M Izen,C Arroyo,S Ecklund ,G.j Baranko ,J Carr,E Rutz,Tomohiro Takahashi ,T Usher,M J Fox,J D Fox,H J Hargis ,G Shapiro,D Bisello,S L White,N Bacchetta,P Coyle ,A.d Yeremian ,L S Osborne,A Lath,D L Burke ,L Chen,D Axen ,E Pieroni,J Ma,A Santocchia,P Schenk ,F J Wickens,J D Turk,G Mantovani,P Emma ,V Hamilton,R.a.i Bell ,P C Kim,S Simone ,P Raimondi,R Blumberg,W Busza,G A Beer ,William J Wisniewski ,Y Du ,T Pavel ,J R Bogart,H O Ogren ,G D Hallewell,He Kang ,Y Hasegawa,R Sobie,R J Plano,Darryl W Peters ,T Bolton,Piero Giorgio Verdini ,Daniel C Williams ,J P Venuti,S Kaiser,C L Yee ,D A Williams,T W Markiewicz,J Lauber ,I Peruzzi,R Shypit ,B Burgess,R Cassell,A D’oliveira ,A Nuttall,D R Rust ,M Haney ,H J Shaw ,W Baker,A Mazzucato,R.h Siemann ,M S Witherell,P Poffenberger ,Nick Walker ,Gary Agnew ,G E Gladding ,S R Smith,A I Mincer,S González ,H Hwang,K Baird ,R King,K Furuno,R J Stephenson,L.s Rochester ,H.w Kendall ,J Va’vra ,R Kofler ,S Watts ,D J Warner ,P J Stiles ,J.c Sheppard ,G Schultz ,Walid A Majid ,Douglas Mccormick ,E W Hughes,C Damerell ,A Johnson ,P Rensing ,P Zucchelli,G R Bower,R Keeler ,B Wadsworth ,T Weber,R Steiner,H Petersen,M G Strauss,V M Nesterov ,Roger Decker ,M Swartz,Gail B Stewart ,M Klein,E R.f Hyatt ,M J Fero,M Kelsey ,S St Lorant,Robert W Williams ,K K Young,Dimitris Mansour ,Raphael Dolin ,R Cowan ,B.l Byers ,R.l Berger ,Lee Robertson ,M Biasini,D M Chambers ,R Dell’orso ,A.k.s Santha ,B Meadows ,A Kulikov ,T Hansl‐Kozanecka ,M Ross ,C Prescott ,A Yim,A Castro,H Y Kim,J Fujimoto,K Pitts ,A K Mckemey,John F Mcgowan ,S Williams ,G R Mason,J.i Friedman ,R Battiston,H Neal,D G Coyne,M Hildreth ,J Seeman ,T Dean,M Breidenbach,S Dasu,W Bugg ,M Nordby,R Langstaff ,R.l English ,J E Clendenin ,X Liu,D Walz,Hiroaki Masuda ,O Chamberlain,P Mockett ,D Müller ,R Davis,S Berridge ,F Ë Taylor ,J Ferrie,M Zolotorev,J Huber,J S Whitaker,Hugh C Cutler ,T Hodges ,J R Johnson,Pablo Sáez ,R Boyce ,R Belcinski ,P N Burrows,B A Schumm,S Bethke,Francisco Borja Barrera ,Mary K Gaillard ,J Frisch,Mohammed Z Tahar ,K Hasegawa,J Hoeflich ,A Bean,K Moffeit ,M.e Huffer ,D Freytag ,C Adolphsen ,P Jacques,D Schultz,G Mueller,G Zapalac,J A Snyder,Robert S Wilson ,M Cavalli‐Sforza ,E L Garwin ,C Zeitlin,Juan C Escalera ,D Alzofon ,D Hale ,P Kunz ,T Shimomura,M S Kowitt ,R Ben‐David ,T R Junk

doi:10.1142/s0217732393003536

Abstract

We present the first measurement of the left-right cross-section asymmetry (A LR ) in Z-boson production observed at the SLAC Linear Collider. In 1992 the SLD detector recorded 10 224 Z events produced by the collision of longitudinally polarized electrons with an unpolarized positron beam at a center-of-mass energy of 91.55 GeV. The average electron beam polarization during the run was (22.4 ± 0.6)%. We measure A LR to be 0.100 ± 0.0440 (stat.) ±0.004 (syst.) , which determines the effective weak mixing angle to be [Formula: see text].

Full Text