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Abe, K.; Akagi, T.; Anderson, B.D.; Anthony, P.L.; Arnold, R.G.; Averett, T.; Band, H.R.; Berisso, C.M.; Bogorad, P.; Borel, H.; Bosted, P.E.; Breton, Vincent; Buenerd, M.; Cates, G.D.; Chupp, T.E.; Churchwell, S.; Coulter, K.P.; Daoudi, M.; Decowski, P.; Erickson, R.; Fellbaum, J.; Fonvieille, H.; Gearhart, R.; Ghazikhanian, V.; Griffioen, K.A.; Hicks, R.S.; Holmes, R.; Hughes, E.W.; Igo, G.; Incerti, S.; Johnson, J.R.; Kahl, W.; Khayat, M.; Kolomensky, Yu.G.; Kuhn, S.E.; Kumar, K.; Kuriki, M.; Lombard-Nelsen, R.M.; Manley, D.M.; Marroncle, J.; Maruyama, T.; Marvin, T.; Meyer, W.; Meziani, Z.E.; Miller, R.; Mitchell, G.; Olson, M.; Peterson, G.A.; Petratos, G.G.; Pitthan, R.; Prepost, R.; Raines, P.; Raue, B.; Reyna, D.; Rochester, L.; Rock, S.E.; Romalis, M.V.; Sabatie, F.; Shapiro, G.; Shaw, J.; Smith, T.B.; Sorrell, L.; Souder, P.A.; Staley, F.; Stuart, L.M.; Suekane, F.; Szalata, Z.M.; Terrien, Y.; Thompson, A.K.; Toole, T.; Wang, X.; Watson, J.W.; Welsh, R.C.; Wesselmann, F.; Wright, T.; Young, C.; Youngman, B.; Yuta, H.; Zhang, W.M.; Zyla, P.
Physical review letters, 07/1997, Letnik: 79Journal Article
We report on a precision measurement of the neutron spin structure function g1ng^n_1g1n using deep inelastic scattering of polarized electrons by polarized ^3He. For the kinematic range 0.014<x<0.7 and 1 (GeV/c)^2< Q^2< 17 (GeV/c)^2, we obtain ∫0.0140.7g1n(x)dx=−0.036±0.004(stat)±0.005(syst)\int^{0.7}_{0.014} g^n_1(x)dx = -0.036 \pm 0.004 (stat) \pm 0.005 (syst)∫0.0140.7g1n(x)dx=−0.036±0.004(stat)±0.005(syst) at an average Q2=5(GeV/c)2Q^2=5 (GeV/c)^2Q2=5(GeV/c)2. We find relatively large negative values for g1ng^n_1g1n at low xxx. The results call into question the usual Regge theory method for extrapolating to x=0 to find the full neutron integral ∫01g1n(x)dx\int^1_0 g^n_1(x)dx∫01g1n(x)dx, needed for testing quark-parton model and QCD sum rules. (arXiv)
