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  • Precision measurement of th...
    Abe, K.; Akagi, T.; Anthony, P.L.; Antonov, R.; Arnold, R.G.; Averett, T.; Band, H.R.; Bauer, J.M.; Borel, H.; Bosted, P.E.; Breton, Vincent; Button-Shafer, J.; Chen, J.P.; Chupp, T.E.; Clendenin, J.; Comptour, C.; Coulter, K.P.; Court, G.; Crabb, D.; Daoudi, M.; Day, D.; Dietrich, F.S.; Dunne, J.; Dutz, H.; Erbacher, R.; Fellbaum, J.; Feltham, A.; Fonvieille, H.; Frlez, E.; Garvey, D.; Gearhart, R.; Gomez, J.; Grenier, P.; Griffioen, K.A.; Hoeibraten, S.; Hughes, E.W.; Hyde-Wright, C.; Johnson, J.R.; Kawall, D.; Klein, A.; Kuhn, S.E.; Kuriki, M.; Lindgren, R.; Liu, T.J.; Lombard-Nelsen, R.M.; Marroncle, J.; Maruyama, T.; Maruyama, X.K.; Mccarthy, J.; Meyer, W.; Meziani, Z.E.; Minehart, R.; Mitchell, J.; Morgenstern, J.; Petratos, G.G.; Pitthan, R.; Pocanic, D.; Prescott, C.; Prepost, R.; Raines, P.; Raue, B.; Reyna, D.; Rijllart, A.; Roblin, Y.; Rochester, L.; Rock, S.E.; Rondon, O.A.; Sick, I.; Smith, L.C.; Smith, T.B.; Spengos, M.; Staley, F.; Steiner, P.; Stuart, L.M.; Suekane, F.; Szalata, Z.M.; Tang, Hao; Terrien, Y.; Usher, T.; Walz, D.; White, J.L.; Witte, K.; Young, C.; Youngman, B.; Yuta, H.; Zapalac, G.; Zihlmann, B.; Zimmermann, D.

    Physical review letters, 01/1995, Letnik: 74
    Journal Article

    We have measured the ratio gsup psub 1/Fsup psub 1 over the range 0.029 < x < 0.8 and 1.3 < Q2 < 10 (GeV/c)2 using deep-inelastic scattering of polarized electrons from polarized ammonia. An evaluation of the integral (integral)gsup psub 1(x,Q2)dx at fixed Q2 = 3 (GeV/c)2 yields 0.127 ± 0.004(stat) ± 0.010(syst), in agreement with previous experiments, but well below the Ellis-Jaffe sum rule prediction of 0.160 ± 0.006. In the quark-parton model, this implies Delta q = 0.27 ± 0.10.