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  • Precision measurements of \(g_1\) of the proton and the deuteron with 6 GeV electrons
    Bosted, P; Kvaltine, N; Adhikari, K P; Aghasyan, M; Amaryan, M J; Pereira, S Anefalos; Baghdasaryan, H; Baltzell, N A; Battaglieri, M; Biselli, A S; Bono, J; Brock, J; Bültmann, S; Carman, D S; Celentano, A; Chandavar, S; Contalbrigo, M; De Vita, R; Deur, A; Djalali, C; Dodge, G E; A El Alaoui; L El Fassi; Elouadrhiri, L; Fedotov, G; Fersch, R; est, T A; Garcon, M; Gevorgyan, N; Ghandilyan, Y; Gilfoyle, G P; Girod, F X; Giovanetti, K L; Goetz, J T; Gohn, W; Gothe, R W; Griffioen, K A; Guegan, B; Harrison, N; Hicks, K; Holtrop, M; Ilieva, Y; Ireland, D G; Isupov, E L; Jiang, X; Jo, H S; Keith, C; Keller, D; Khandaker, M; Kim, W; Klein, A; Klein, F J; Koirala, S; Kubarovsky, V; Kuhn, S E; Lenisa, P; Livingston, K; Lu, H Y; MacGregor, I J D; Markov, N; Mayee, M; McKinnon, B; Meekins, D; Mirazita, M; Mokeev, V; Montgomery, R A; Moutarde, H; C Munoz Camacho; Nadel-Turonski, P; Niccolai, S; Niculescu, G; Niculescu, I; Pappalardo, L L; Peng, P; Pisano, S; Price, J W; Procureur, S; Puckett, A J R; Rimal, D; Rizzo, A; Rosner, G; Sabatié, F; Salgado, C; Sharabian, Y G; Smith, C; Smith, G; Sokhan, D; Stepanyan, S; Strauch, S; Sytnik, V; Tkachenko, S; Ungaro, M; Vlassov, A V; Voskanyan, H; Walford, N K; Watts, D P; Zachariou, N; Zhao, Z W; Zonta, I; the CLAS collaboration

    arXiv.org, 04/2014
    Paper

    The inclusive polarized structure functions of the proton and deuteron, g1p and g1d, were measured with high statistical precision using polarized 6 GeV electrons incident on a polarized ammonia target in Hall B at Jefferson Laboratory. Electrons scattered at lab angles between 18 and 45 degrees were detected using the CEBAF Large Acceptance Spectrometer (CLAS). For the usual DIS kinematics, Q^2>1 GeV^2 and the final-state invariant mass W>2 GeV, the ratio of polarized to unpolarized structure functions g1/F1 is found to be nearly independent of Q^2 at fixed x. Significant resonant structure is apparent at values of W up to 2.3 GeV. In the framework of perturbative QCD, the high-W results can be used to better constrain the polarization of quarks and gluons in the nucleon, as well as high-twist contributions.

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