Measurement of the proton spin structure function [formula presented] for [formula presented] from 0.15 to [formula presented] with clas

R. Fatemi, A. V. Skabelin, V. D. Burkert, D. Crabb, R. De Vita, S. E. Kuhn, R. Minehart, G. Adams, E. Anciant, M. Anghinolfi, B. Asavapibhop, G. Audit, T. Auger, H. Avakian, H. Bagdasaryan, J. P. Ball, S. Barrow, M. Battaglieri, K. Beard, M. BektasogluM. Bellis, W. Bertozzi, N. Bianchi, A. S. Biselli, S. Boiarinov, B. E. Bonner, P. E. Bosted, S. Bouchigny, R. Bradford, D. Branford, W. K. Brooks, C. Butuceanu, J. R. Calarco, D. S. Carman, B. Carnahan, C. Cetina, L. Ciciani, R. Clark, P. L. Cole, A. Coleman, J. Connelly, D. Cords, P. Corvisiero, H. Crannell, J. P. Cummings, E. De Sanctis, P. V. Degtyarenko, H. Denizli, L. Dennis, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, G. E. Dodge, D. Doughty, P. Dragovitsch, Michael Dugger, S. Dytman, M. Eckhause, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, A. Empl, P. Eugenio, L. Farhi, R. J. Feuerbach, A. Freyberger, J. Ficenec, T. A. Forest, V. Frolov, H. Funsten, S. J. Gaff, M. Garçon, G. Gavalian, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, P. Girard, C. I.O. Gordon, K. A. Griffioen, M. Guidal, M. Guillo, L. Guo, V. Gyurjyan, C. Hadjidakis, D. Hancock, J. Hardie, D. Heddle, P. Heimberg, F. W. Hersman, K. Hicks, R. S. Hicks, M. Holtrop, J. Hu, C. E. Hyde-Wright, Y. Ilieva, M. M. Ito, D. Jenkins, K. Joo, C. Keith, J. H. Kelley, J. D. Kellie, M. Khandaker, K. Y. Kim, K. Kim, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Klusman, M. Kossov, V. Koubarovski, L. H. Kramer, Y. Kuang, J. Kuhn, J. Lachniet, J. M. Laget, D. Lawrence, Ji Li, K. Livingston, A. Longhi, K. Lukashin, W. Major, J. J. Manak, C. Marchand, S. McAleer, J. W.C. McNabb, B. A. Mecking, S. Mehrabyan, M. D. Mestayer, C. A. Meyer, K. Mikhailov, M. Mirazita, R. Miskimen, L. Morand, S. A. Morrow, V. Muccifora, J. Mueller, G. S. Mutchler, J. Napolitano, R. Nasseripour, S. O. Nelson, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, R. A. Niyazov, M. Nozar, J. T. O’Brien, G. V. O’Rielly, M. Osipenko, K. Park, E. Pasyuk, G. Peterson, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, S. Pozdniakov, B. M. Preedom, J. W. Price, Y. Prok, D. Protopopescu, L. M. Qin, B. A. Raue, G. Riccardi, G. Ricco, M. Ripani, Barry Ritchie, S. E. Rock, F. Ronchetti, P. Rossi, D. Rowntree, P. D. Rubin, F. Sabatié, K. Sabourov, C. Salgado, J. P. Santoro, V. Sapunenko, M. Sargsyan, R. A. Schumacher, M. Seely, V. S. Serov, Y. G. Sharabian, J. Shaw, S. Simionatto, E. S. Smith, T. Smith, L. C. Smith, D. I. Sober, L. Sorrel, M. Spraker, A. Stavinsky, S. Stepanyan, P. Stoler, S. Strauch, M. Taiuti, S. Taylor, D. J. Tedeschi, U. Thoma, R. Thompson, L. Todor, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, K. Wang, L. B. Weinstein, H. Weller, D. P. Weygand, C. S. Whisnant, E. Wolin, M. H. Wood, A. Yegneswaran, J. Yun, B. Zhang, J. Zhao, Z. Zhou

Research output: Contribution to journalArticle

Abstract

Double-polarization asymmetries for inclusive [Formula presented] scattering were measured at Jefferson Lab using 2.6 and 4.3 GeV longitudinally polarized electrons incident on a longitudinally polarized [Formula presented] target in the CLAS detector. The polarized structure function [Formula presented] was extracted throughout the nucleon resonance region and into the deep inelastic regime, for [Formula presented]. The contributions to the first moment [Formula presented] were determined up to [Formula presented]. Using a parametrization for [Formula presented] in the unmeasured low [Formula presented] regions, the complete first moment was estimated over this [Formula presented] region. A rapid change in [Formula presented] is observed for [Formula presented], with a sign change near [Formula presented], indicating dominant contributions from the resonance region. At [Formula presented] our data are below the perturbative QCD evolved scaling value.

Original languageEnglish (US)
JournalPhysical Review Letters
Volume91
Issue number22
DOIs
StatePublished - Jan 1 2003

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Fatemi, R., Skabelin, A. V., Burkert, V. D., Crabb, D., Vita, R. D., Kuhn, S. E., Minehart, R., Adams, G., Anciant, E., Anghinolfi, M., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J. P., Barrow, S., Battaglieri, M., Beard, K., ... Zhou, Z. (2003). Measurement of the proton spin structure function [formula presented] for [formula presented] from 0.15 to [formula presented] with clas. Physical Review Letters, 91(22). https://doi.org/10.1103/PhysRevLett.91.222002