Measurement of the spin-dependent structure function g1 of the proton

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

doi:10.1016/0370-2693(94)90793-5

We have measured the spin-dependent structure function g1p 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, ∫01g1p(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

Measurement of the spin-dependent structure function g1 of the proton / Adams, D., Adeva, B., Arik, E., Arvidson, A., Badelek, B., Ballintijn, M.K., Bardin, G., Baum, G., Berglund, P., Betev, L., Bird, I.G., Birsa, R., Björkholm, P., Bonner, B.E., de Botton, N., Bradamante, F., Bressan, A., Brüll, A., Bültmann, S., Burtin, E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 329:(1994), pp. 399-406. [10.1016/0370-2693(94)90793-5]