Measurements of the Q2-Dependence of the Proton and Deuteron Spin Structure Functions g1p and g1d

P.L. Anthony,R. G. Arnold,T. Averett,H. R. Band, M.C. Berisso,H. Borel,P. E. Bosted,S. Bültmann,M.J. Buenerd,Timothy Chupp, S. Churchwell,G.R. Court,D. Crabb,Donal Day, P. Decowski, P. DePietro,R. Erbacher,R. Erickson,A. Feltham,H. Fonvieille,Emil Frlez,R. Gearhart,V. Ghazikhanian,J. Gomez,K. A. Griffioen, C. Harris, M. A. Houlden,E. W. Hughes, C.E Hyde-Wright, G. Igo,Sebastien Incerti,J. Jensen,J. R. Johnson,P.M. King,Yu. G. Kolomensky,S.E Kuhn,R. A. Lindgren,R. M. Lombard-Nelsen,J. Marroncle,J. S. McCarthy, P. McKee,W. Meyer,Gregory S. Mitchell,John C. Mitchell, M. Olson,S. I. Penttilä, G. A. Peterson,G. G. Petratos,R. Pitthan,Dinko Pocanic,R Prepost,C. Y. Prescott, L.M Qin,B. A. Raue,D. Reyna,L. S. Rochester,Stephen M. Rock, O. Rondon-Aramayo,F. Sabatié,Ingo Sick,Timothy B. Smith,L. Sorrell,F. Staley,S.St. Lorant,L. M. Stuart,Z. M. Szalata,Y. Terrien, A. Tobias, L. Todor, T. Toole,S. Trentalange,D. Walz,Robert C. Welsh, F.R. Wesselmann, T. R. Wright,C. C. Young, M. Zeier,Hongbo Zhu,B. Zihlmann

Physics Letters B（2000）

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摘要

Abstract The ratio g 1 F 1 has been measured over the range 0.03 g 1 F 1 to be consistent with no Q2-dependence at fixed x in the deep-inelastic region Q2 > 1 (GeV/c)2. A trend is observed for g 1 F 1 to decrease at lower Q2. Fits to world data with and without a possible Q2-dependence in g 1 F 1 are in agreement with the Bjorken sum rule, but Δq is substantially less than the quark-parton model expectation.

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