Measurement of alpha s from energy-energy correlations at the Z0 resonance.

K Abe,G D Punkar,A Szumilo,P Stamer,C Y Prescott,R Cassell,M Piccolo,R W Zdarko,J M Yamartino,J S Whitaker,T W Markiewicz,X Liu,J P Venuti,T R Junk ,W Bugg ,R Elia,S L White,G R Bower,T Gillman,C Vannini,P Rensing ,C Simopoulos,F Ë Taylor ,G Shapiro,R J Wilson,T Barklow,E Church,B A Schumm,A Calcaterra,R K Yamamoto,U Schneekloth,P Mockett ,L Pescara,B Camanzi,M Cavalli‐Sforza ,A Lu,S González ,H Yuta,T Schalk,S R Smith,D L Burke ,M H Shaevitz,D R Müller ,E W Hughes,J J Russell,S Williams ,A P Waite,S Yellin ,D G Coyne,J Quigley,Y Hasegawa,O Bardon,A W Weidemann,J A Coller,T W Reeves,E Torrence,G Baranko,T Bienz,J Rothberg ,A Sugiyama,G Zapalac,M Kalelkar,O H Saxton,E Pieroni,M Carpinelli,W J Wisniewski,R S B King ,H O Cohn,J Wyss,I Peruzzi,N Bacchetta,D J Sherden,S Willocq,P G Verdini,A Seiden,R H Schindler,K C Moffeit,R Prepost,A Lath,E L Hart,C Fan,A Castro,A Johnson ,I Abt,R Frey,J D Turk,M Loreti,R Dell’Orso,T Bolton,L S Osborne,H Hwang,S Suzuki,H Steiner,D Aston,H Neal,J Labs ,K Pitts ,D Calloway,S Manly,R J Plano,D O Caldwell,R Cotton,B Meadows ,J Ma,B I Eisenstein,A.o Bazarko ,D Williams ,R Cowan ,J E Brau,I Karliner,D C Williams,U Nauenberg,A C Benvenuti,M Langston,R Kajikawa,Y Iwasaki,C Baltay,J Va’Vra,G B Word,H R Band,J Lauber ,L Piemontese,R Kroeger ,V Cook,M.e Huffer ,P Jacques,S Dasu,H L Lynch,Y Du ,R Dubois,Y J Kwon ,K Furuno,S S Hertzbach,M G Strauss,G M Bilei,B N Ratcliff,F J Wickens,J R Johnson,Tohru Takahashi ,J A Jaros ,J T Shank,T H Burnett,M King ,R Kofler ,M Swartz,T Pavel ,S.r Wagner ,D Bisello,G Mantovani,G Mancinelli,R A Johnson,P C Rowson,H.w Kendall ,Sanjib Sen ,W W Ash,K Baird ,R Messner,G Gladding,R De Sangro,T Usher,G D Hallewell,R Steiner,G Blaylock,R Castaldi,H Kawahara,J Huber,M B Barakat,D Su,F Suekane,E Mazzucato,M Breidenbach,C Zeitlin,M Nussbaum,J R Bogart,T Maruyama,M J Fero,M Woods,P De Simone,L.s Rochester ,D W G S Leith ,E Vella,N.m Krishna ,R Ben‐David ,W Busza,S Watts ,C C Young,G Müller,H Park,A D’Oliveira,A K Mckemey,Hiroaki Masuda ,Philip Burrows ,B Mours,M Hildreth ,J A Snyder,T Nagamine,R S Panvini,S Hedges,Chris Damerell ,Jianfeng Zhou

doi:10.1103/physrevd.50.5580

Abstract

We have determined the strong coupling alpha-s from a comprehensive study of energy-energy correlations (EEC) and their asymmetry (AEEC) in hadronic decays of Z0 bosons collected by the SLD experiment at SLAC. The data were compared with all four available predictions of QCD calculated up to O(alpha-s**2) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between alpha-s values extracted from the different O(alpha-s**2) calculations. We also find a large renormalization scale ambiguity in alpha-s determined from the EEC using the O(alpha-s**2) calculations; this ambiguity is reduced in the case of the AEEC, and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain alpha-s(MZ)=0.124+0.003-0.004(exp.) +-0.009(theory).

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