Measurement Of Alpha(S)(M(Z)(2)) From Hadronic Event Observables At The Z(0) Resonance

K. Abe,I Abt,Cj Ahn,T Akagi,Ww Ash,D Aston,N Bacchetta,Kg Baird, C Baltay,Hr Band,Mb Barakat,G Baranko,O Bardon, T Barklow,Ao Bazarko,R Bendavid,Ac Benvenuti,T Bienz,Gm Bilei, D Bisello,G Blaylock,Bogart,T A Bolton,Gr Bower,Je Brau,M Breidenbach,Wm Bugg,D L Burke,Th Burnett,Pn Burrows,Wit Busza,A Calcaterra,Do Caldwell, D Calloway,B Camanzi,M Carpinelli,R E Cassell,R Castaldi,A Castro, M Cavallisforza,E Church,Ho Cohn,Ja Coller,Cook, R E Cotton,Rf Cowan,Dg Coyne, Ana Flavia Doliveira,Cjs Damerell, S Dasu,R Desangro,P Desimone,R Dellorso,M Dima,Pyc Du,R Dubois,Bi Eisenstein,R Elia,D Falciai,C Fan,Mj Fero,R Frey,K Furuno,Tony Gillman,Gary E Gladding,S Gonzalez,Gd Hallewell,El Hart,Yoji Hasegawa,S Hedges,Ss Hertzbach,Md Hildreth, Jacqueline Huber,Me Huffer,Ew Hughes,H Hwang,Y Iwasaki,Paul F Jacques,J A Jaros,As Johnson, Johnson,Ra Johnson, T R Junk,R Kajikawa,M Kalelkar,I Karliner,H Kawahara,Hw Kendall,Youngmin Kim,M King,R King,Rr Kofler,Nm Krishna,R Kroeger,Jf Labs,M Langston, A Lath,Ja Lauber,Dwg Leith, Xiangrong Liu,M Loreti,A Lu,Hl Lynch,J Ma,G Mancinelli,S Manly,Giancarlo Mantovani,Tw Markiewicz, Tsukasa Maruyama,R Massetti, Hirotaka Masuda, E Mazzucato,A K Mckemey,Bt Meadows,R Messner,Pm Mockett,Kc Moffeit,B Mours,G Muller,D R Muller,T Nagamine, U Nauenberg, H A Neal,M Nussbaum,Yozo Ohnishi,Ls Osborne,Rs Panvini,H Park,Tj Pavel,I M Peruzzi,L Pescara,M Piccolo,L Piemontese,E Pieroni,Kt Pitts,Rj Plano,R Prepost,Cy Prescott,Gd Punkar,J Quigley,Bn Ratcliff,Tw Reeves,Pe Rensing,Ls Rochester,Je Rothberg,Pc Rowson,Jj Russell,O H Saxton,T Schalk,Rh Schindler,U Schneekloth,Ba Schumm, A Seiden, S Sen,Vv Serbo,Mh Shaevitz,Jt Shank,Geoffrey I Shapiro,Sl Shapiro,D J Sherden,C Simopoulos,Nb Sinev, Smith,Ja Snyder,P Stamer,H Steiner, R M Steiner,Mg Strauss,Dingfeng Su,F Suekane,A Sugiyama,S Suzuki, M Swartz,A Szumilo,Takashi Takahashi,Fe Taylor,E Torrence, J S Turk,T L Usher, J Vavra,C Vannini,E Vella,Jp Venuti,Pg Verdini, Wagner,Ap Waite,Sj Watts,Aw Weidemann,Js Whitaker,Sl White,Fj Wickens,Dc Williams,Sh Williams, S Willocq,Rj Wilson,Wj Wisniewski,M Woods,Gb Word, J Wyss,Rk Yamamoto,Jm Yamartino, Xianglei Yang,Sj Yellin,Cc Young,H Yuta,G Zapalac,R W Zdarko,C Zeitlin, Jing Zhou

PHYSICAL REVIEW D（1995）

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摘要

The strong coupling alpha_s(M_Z^2) has been measured using hadronic decays of Z^0 bosons collected by the SLD experiment at SLAC. The data were compared with QCD predictions both at fixed order, O(alpha_s^2), and including resummed analytic formulae based on the next-to-leading logarithm approximation. In this comprehensive analysis we studied event shapes, jet rates, particle correlations, and angular energy flow, and checked the consistency between alpha_s(M_Z^2) values extracted from these different measures. Combining all results we obtain alpha_s(M_Z^2) = 0.1200 \pm 0.0025(exp.) \pm 0.0078(theor.), where the dominant uncertainty is from uncalculated higher order contributions.

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particle physics

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