Next-to-leading order QCD analysis of polarized deep inelastic scattering data

K. Abe, T. Akagi, B. D. Anderson, P. L. Anthony, R. G. Arnold, T. Averett, H. R. Band, C. M. Berisso, P. Bogorad, H. Borel, P. E. Bosted, V. Breton, M. J. Buenerd, G. D. Cates, T. E. Chupp, S. Churchwell, K. P. Coulter, M. Daoudi, P. Decowski, R. EricksonJ. N. Fellbaum, H. Fonvieille, R. Gearhart, V. Ghazikhanian, K. A. Griffioen, R. S. Hicks, R. Holmes, E. W. Hughes, G. Igo, S. Incerti, J. R. Johnson, W. Kahl, M. Khayat, Yu G. Kolomensky, S. E. Kuhn, K. Kumar, M. Kuriki, R. Lombard-Nelsen, D. M. Manley, J. Marroncle, T. Maruyama, T. Marvin, W. Meyer, Z. E. Meziani, D. Miller, G. Mitchell, M. Olson, G. A. Peterson, G. G. Petratos, R. Pitman, R. Prepost, P. Raines, B. A. Raue, D. Reyna, L. S. Rochester, S. E. Rock, M. V. Romalis, F. Sabatie, G. Shapiro, J. Shaw, T. B. Smith, L. Sorrell, P. A. Souder, F. Staley, S. St Lorant, L. M. Stuart, F. Suekane, Z. M. Szalata, Y. Terrien, A. K. Thompson, T. Toole, X. Wang, J. W. Watson, R. C. Welsh, F. R. Wesselmann, T. Wright, C. C. Young, B. Youngman, H. Yuta, W. M. Zhang, P. Zyla

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140 Scopus citations

Abstract

We present a next-to-leading order perturbative QCD analysis of world data on the spin dependent structure functions gp1, gn1, and gd1, including the new experimental information on the Q2 dependence of gn1. Careful attention is paid to the experimental and theoretical uncertainties. The data constrain the first moments of the polarized valence quark distributions, but only qualitatively constrain the polarized sea quark and gluon distributions. The NLO results are used to determine the Q2 dependence of the ratio g1/F1 and evolve the experimental data to a constant Q2 = 5 GeV2. We determine the first moments of the polarized structure functions of the proton and neutron and find agreement with the Bjorken sum rule.

Original languageEnglish (US)
Pages (from-to)180-190
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume405
Issue number1-2
DOIs
StatePublished - Jul 17 1997

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Abe, K., Akagi, T., Anderson, B. D., Anthony, P. L., Arnold, R. G., Averett, T., Band, H. R., Berisso, C. M., Bogorad, P., Borel, H., Bosted, P. E., Breton, V., Buenerd, M. J., Cates, G. D., Chupp, T. E., Churchwell, S., Coulter, K. P., Daoudi, M., Decowski, P., ... Zyla, P. (1997). Next-to-leading order QCD analysis of polarized deep inelastic scattering data. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 405(1-2), 180-190. https://doi.org/10.1016/S0370-2693(97)00641-2