Precision determination of the neutron spin structure function $g^{n}_{1}$
- 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.
DOIAbstract
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 QC...
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