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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. Bektasoglu
  • M. 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, M. 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, B. G. 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 journalArticlepeer-review

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
JournalPhysical Review Letters
Volume91
Issue number22
DOIs
StatePublished - 2003

ASJC Scopus subject areas

  • General Physics and Astronomy

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