High-precision measurement of the left-right Z Boson cross-section asymmetry.

Kenji Abe,G Mancinelli,W J Wisniewski,D Onoprienko,M Daoudi,M Iwasaki,D L Wagner,J P Fernandez,S Dasu,R Verdier,R Dubois,A Chou,T B Moore,S Walston,M Langston,H Yuta,A Sugiyama,J R Johnson,A P Waite,J Wang,D Su,C C Young,V Eschenburg,T Maruyama,T W Markiewicz,T Schalk,P Jacques,H Akimoto,G Mantovani,M Breidenbach,O H Saxton,D Falciai,T Usher,C H Park,S Manly,P L Reinertsen,L Piemontese,C Baltay,I Peruzzi,J Yashima,E Etzion,G Crawford,I Erofeeva,J A Jaros,S Fahey,E L Hart,R S Panvini,R De Sangro,J A Coller,E Torrence,C Y Prescott,K Hasuko,J R Bogart,M J Fero,V Lia,B N Ratcliff,R Messner,T H Burnett,R K Yamamoto,S Willocq,R Kajikawa,M Swartz,M Piccolo,M Kalelkar,M R Convery,J Reidy,S Narita,G R Bower,G Shapiro,N De Groot,V Cook,G Blaylock,D Aston,R Frey,B A Schumm,J M Bauer,L S Osborne,H Staengle,P Stamer,J S Whitaker,R Prepost,G Nesom,S S Hertzbach,R J Plano,N B Sinev,J A Snyder,M Morii,X Huynh,H Steiner,R Cassell,H Neal,F Suekane,A Stahl,H O Cohn,J Schwiening,C Lin,M Doser,M Woods,J E Brau,E R Weiss,K C Moffeit,H R Band,P C Rowson,A W Weidemann,N Oishi,G Bellodi,U Nauenberg,J J Russell,J Thom,A K Mckemey,A Calcaterra,J Wittlin ,T Wright ,Robert Berger ,J Va’vra ,R Kroeger ,D Jackson ,W Bugg ,Hyejoo Kang ,D L Burke ,C Damerell ,V S Murzin ,V.v Serbo ,F Taylor ,D R Müller ,Z Jiang ,A Johnson ,S Williams ,D W G S Leith ,T Barklow ,K T Flood ,M.e Huffer ,P.n Burrows ,K Baird ,Abe T ,R Kofler ,И Адам ,Lynn Rochester ,Robert S Wilson ,R Cowan ,D Dong ,K Abe ,S Yellin

doi:10.1103/physrevlett.84.5945

Abstract

We present a measurement of the left-right cross-section asymmetry ( A(LR)) for Z boson production by e(+)e(-) collisions. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996-1998. Using a sample of 383 487 Z decays collected during the 1996-1998 runs we measure the pole value of the asymmetry, A(0)(LR), to be 0.150 56+/-0.002 39 which is equivalent to an effective weak mixing angle of sin (2)straight theta(eff)(W) = 0.231 07+/-0.000 30. Our result for the complete 1992-1998 data set comprising approximately 537 000 Z decays is sin (2)straight theta(eff)(W) = 0.230 97+/-0.000 27.

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