Measurement of the spin-dependent structure function g1(x) of the proton

D. Adams*, B. Adeva, E. Arik, A. Arvidson, B. Badelek, M. K. Ballintijn, G. Bardin, G. Baum, P. Berglund, L. Betev, I. G. Bird, R. Birsa, P. Björkholm, B. E. Bonner, N. de Botton, F. Bradamante, A. Bressan, A. Brüll, S. Bültmann, E. BurtinC. Cavata, M. Clocchiatti, M. D. Corcoran, D. Crabb, J. Cranshaw, M. Crawford, T. Çuhadar, S. Dalla Torre, R. van Dantzig, S. Dhawan, C. Dulya, A. Dyring, S. Eichblatt, J. C. Faivre, D. Fasching, F. Feinstein, C. Fernandez, B. Frois, J. A. Garzon, T. Gaussiran, M. Giorgi, E. von Goeler, G. Gracia, N. de Groot, M. Grosse Perdekamp, E. Gülmez, D. von Harrach, T. Hasegawa, P. Hautle, N. Hayashi, C. A. Heusch, N. Horikawa, V. W. Hughes, G. Igo, S. Ishimoto, T. Iwata, E. M. Kabuß, R. Kaiser, A. Karev, H. J. Kessler, T. J. Ketel, A. Kishi, Yu Kisselev, L. Klostermann, D. Krämer, V. Krivokhijine, V. Kukhtin, J. Kyynäräinen, M. Lamanna, U. Landgraf, K. Lau, T. Layda, M. J. Le Goff, F. Lehar, A. de Lesquen, J. Lichtenstadt, T. Lindqvist, M. Litmaath, S. Lopez-Ponte, M. Lowe, A. Magnon, G. K. Mallot, F. Marie, A. Martin, J. Martino, T. Matsuda, B. Meyes, J. S. McCarthy, K. Medved, G. van Middelkoop, D. Miller, K. Mori, J. Moromisato, A. Nagaitsev, J. Nassalski, L. Naumann, T. O. Niinikoski, J. E.J. Oberski, D. P. Parks, A. Penzo, C. Perez, F. Perrot-Kunne, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Plo, D. Pose, H. Postma, J. Pretz, T. Pussieux, J. Pyrlik, I. Reyhancan, J. M. Rieubland, A. Rijllart, J. B. Roberts, S. Rock, M. Rodriguez, E. Rondio, A. Rosado, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, K. P. Schüler, R. Segel, R. Seitz, Y. Semertzidis, F. Sever, P. Shanahan, N. Shumeiko, G. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. Stuhrmann, K. M. Teichert, F. Tessarotto, M. Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, R. Windmolders, R. Willumeit, W. Wislicki, A. Witzmann, A. M. Zanetti, J. Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

416 Scopus citations

Abstract

We have measured the spin-dependent structure function g1 p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < x < 0.7 and 1 GeV2 < Q2 < 60 GeV2. Its first moment, ∫0 1 g1 p(x)dx, is found to be 0.136±0.011 (stat.)± 0.011 (syst.) at Q2 = 10GeV2. This value is smaller than the prediction of the Ellis-Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10% of the theoretical value.

Original languageEnglish
Pages (from-to)399-406
Number of pages8
JournalPhysics Letters B
Volume329
Issue number2-3
DOIs
StatePublished - 16 Jun 1994
Externally publishedYes

Funding

FundersFunder number
Israeli Academy of Sciences
KBN
US-Israel Binational Science Foundation
National Science Foundation
U.S. Department of Energy
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Mitsubishi Foundation
Comisión Interministerial de Ciencia y Tecnología
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
lshida Foundation

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