Measurement of the neutron spin structure function gn2 and asymmetry An2 Article

Abe, K, Akagi, T, Anderson, BD et al. (1997). Measurement of the neutron spin structure function gn2 and asymmetry An2 . PHYSICS LETTERS B, 404(3-4), 377-382. 10.1016/S0370-2693(97)00613-8

cited authors

  • Abe, K; Akagi, T; Anderson, BD; Anthony, PL; Arnold, RG; Averett, T; Band, HR; Berisso, CM; Bogorad, P; Borel, H; Bosted, PE; Breton, V; Buenerd, MJ; Cates, GD; Chupp, TE; Churchwell, S; Coulter, KP; Daoudi, M; Decowski, P; Erickson, R; Fellbaum, JN; Fonvieille, H; Gearhart, R; Ghazikhanian, V; Griffioen, KA; Hicks, RS; Holmes, R; Hughes, EW; Igo, G; Incerti, S; Johnson, JR; Kahl, W; Khayat, M; Kolomensky, YG; Kuhn, SE; Kumar, K; Kuriki, M; Lombard-Nelsen, R; Manley, DM; Marroncle, J; Maruyama, T; Marvin, T; Meyer, W; Meziani, ZE; Miller, D; Mitchell, G; Olson, M; Peterson, GA; Petratos, GG; Pitthan, R; Prepost, R; Raines, P; Raue, BA; Reyna, D; Rochester, LS; Rock, SE; Romalis, MV; Sabatie, F; Shapiro, G; Shaw, J; Smith, TB; Sorrell, L; Souder, PA; Staley, F; St. Lorant, S; Stuart, LM; Suekane, F; Szalata, ZM; Terrien, Y; Thompson, AK; Toole, T; Wang, X; Watson, JW; Welsh, RC; Wesselmann, FR; Wright, T; Young, CC; Youngman, B; Yuta, H; Zhang, WM; Zyla, P



  • We have measured the neutron structure function gn2 and the virtual photon-nucleon asymmetry An2 over the kinematic range 0.014 ≤ x ≤ 0.7 and 1.0 ≤ Q2 ≤ 17.0 by scattering 48.3 GeV longitudinally polarized electrons from polarized 3He. Results for An2 are significantly smaller than the √R positivity limit over most of the measured range and data for gn2 are generally consistent with the twist-2 Wandzura-Wilczek prediction. Using our measured gn2 we obtain results for the twist-3 reduced matrix element dn2, and the integral ∫ gn2(x) dx in the range 0.014 ≤ x ≤ 1.0. Data from this experiment are combined with existing data for gn2 to obtain an average for dn2 and the integral ∫ gn2(x) dx. © 1997 Published by Elsevier Science B.V.

publication date

  • July 10, 1997

published in

Digital Object Identifier (DOI)

start page

  • 377

end page

  • 382


  • 404


  • 3-4