Measurements of the proton and deuteron spin structure functions [Formula Presented] and [Formula Presented] Article

Abe, K, Akagi, T, Anthony, PL et al. (1998). Measurements of the proton and deuteron spin structure functions [Formula Presented] and [Formula Presented] . 58(11), 10.1103/PhysRevD.58.112003



cited authors

  • Abe, K; Akagi, T; Anthony, PL; Antonov, R; Arnold, RG; Averett, T; Band, HR; Bauer, JM; Borel, H; Bosted, PE; Breton, V; Button-Shafer, J; Chen, JP; Chupp, TE; Clendenin, J; Comptour, C; Coulter, KP; Court, G; Crabb, D; Daoudi, M; Day, D; Dietrich, FS; Dunne, J; Dutz, H; Erbacher, R; Fellbaum, J; Feltham, A; Fonvieille, H; Frlez, E; Garvey, D; Gearhart, R; Gomez, J; Grenier, P; Griffioen, KA; Hoibraten, S; Hughes, EW; Hyde-Wright, C; Johnson, JR; Kawall, D; Klein, A; Kuhn, SE; Kuriki, M; Lindgren, R; Liu, TJ; Lombard-Nelsen, RM; Marroncle, J; Maruyama, T; Maruyama, XK; McCarthy, J; Meyer, W; Meziani, Z; Minehart, R; Mitchell, J; Morgenstern, J; Petratos, GG; Pitthan, R; Pocanic, D; Prescott, C; Prepost, R; Raines, P; Raue, B; Reyna, D; Rijllart, A; Roblin, Y; Rochester, LS; Rock, SE; Rondon, OA; Sick, I; Smith, LC; Smith, TB; Spengos, M; Staley, F; Steiner, P; St. Lorant, S; Stuart, LM; Suekane, F; Szalata, ZM; Tang, H; Terrien, Y; Usher, T; Walz, D; Wesselmann, F; White, JL; Witte, K; Young, CC; Youngman, B; Yuta, H; Zapalac, G; Zihlmann, B; Zimmermann, D

fiu authors

abstract

  • Measurements are reported of the proton and deuteron spin structure functions [Formula Presented] and [Formula Presented] at beam energies of 29.1, 16.2, and 9.7 GeV, and [Formula Presented] and [Formula Presented] at a beam energy of 29.1 GeV. The integrals [Formula Presented] and [Formula Presented] were evaluated at fixed [Formula Presented] using the full data set to yield [Formula Presented] and [Formula Presented] The [Formula Presented] dependence of the ratio [Formula Presented] was studied and found to be small for [Formula Presented] Within experimental precision the [Formula Presented] data are well described by the twist-2 contribution, [Formula Presented] Twist-3 matrix elements were extracted and compared to theoretical predictions. The asymmetry [Formula Presented] was measured and found to be significantly smaller than the positivity limit [Formula Presented] for both proton and deuteron targets. [Formula Presented] is found to be positive and inconsistent with zero. Measurements of [Formula Presented] in the resonance region show strong variations with [Formula Presented] and [Formula Presented] consistent with resonant amplitudes extracted from unpolarized data. These data allow us to study the [Formula Presented] dependence of the integrals [Formula Presented] and [Formula Presented] below the scaling region. © 1998 The American Physical Society.

publication date

  • January 1, 1998

Digital Object Identifier (DOI)

volume

  • 58

issue

  • 11