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The spin-dependent structure function g1(x) of the deuteron from polarized deep-inelastic muon scattering

1997; Elsevier BV; Volume: 396; Issue: 1-4 Linguagem: Inglês

10.1016/s0370-2693(97)00159-7

1873-2445

D. L. Adams, B. Adeva, T. Akdoğan, E. Arık, A. Arvidson, B. Badełek, M. Ballintijn, D.Y. Bardin, G. Bardin, G. Baum, P. Berglund, L. Betev, I. Bird, R. Birsa, P. Björkholm, B. E. Bonner, N. de Botton, M. Boutemeur, F. Bradamante, A. Bravar, A. Bressan, S. Bültmann, E. Burtin, C. Cavata, Donald G. Crabb, J. Cranshaw, T. Çuhadar, S. Dalla Torre, R. van Dantzig, B. Derro, A. Deshpande, S. Dhawan, C. Dulya, A. Dyring, S. Eichblatt, J.C. Faivre, D. Fasching, F. Feinstein, Christian Fernandéz, B. Frois, A. Gallas, J. A. Garzón, T. Gaussiran, M. Giorgi, E. von Goeler, F. Perez Gomez, G. Gracia, N. De Groot, M. Große Perdekamp, 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, T. Kageya, L. V. Kalinovskaya, A. Karev, H.J. Kessler, T. Ketel, J. Kiryluk, A. Kishi, Yu. Kisselev, L. Klostermann, D. Krämer, V. G. Krivokhijine, W. Kröger, V. Kukhtin, K. Kurek, J. Kyynäräinen, M. Lamanna, U. Landgraf, J.M. Le Goff, F. Lehar, A. de Lesquen, J. Lichtenstadt, T. Lindqvist, M. Litmaath, M. Löwe, A. Magnon, G.K. Mallot, F. Marie, A. Martin, J. Martino, T. Matsuda, B. Mayes, J. S. McCarthy, K. Medved, G. van Middelkoop, D. H. Miller, K. Mori, J. Moromisato, А. Нагайцев, J. Nassalski, L. Naumann, T. Niinikoski, J.E.J. Oberski, A. Ogawa, C. Özben, Drew Parks, F. Perrot-Kunne, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Pló, J. Polec, D. Pose, H. Postma, J. Pretz, R. Puntaferro, T. Pussieux, J. Pyrlik, G. Rädel, G. Rijllart, J. B. Roberts, S. E. Rock, Miguel Á. Rodríguez, E. Rondio, A. Rosado, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, K. P. Schüler, R. Seitz, Yannis K. Semertzidis, F. Sever, P. Shanahan, Ernst Sichtermann, Francesca Simeoni, G.I. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. B. Stuhrmann, M. Szleper, K.M. Teichert, F. Tessarotto, W. Tłaczała, S. Trentalange, A. Tripet, G. Unel, M. Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, R. Windmolders, Regine Willumeit‐Römer, W. Wiślicki, A. Witzmann, A. Yáñez, Y. Ylöstalo, A. M. Zanetti, К. Заремба, J. Zhao,

High-Energy Particle Collisions Research

We present a new measurement of the spin-dependent structure function g1d of the deuteron from deep inelastic scattering of 190 GeV polarized muons on polarized deuterons. The results are combined with our previous measurements of g1d. A perturbative QCD evolution in next-to-leading order is used to compute g1d(x) at a constant Q2. At Q2 = 10 GeV2, we obtain a first moment Γ1d=∫1dg1ddx=0.041±0.008, a flavour-singlet axial charge of the nucleon a0 = 0.30 ± 0.08, and an axial charge of the strange quark as = −0.09 ± 0.03. Using our earlier determination of Γ1p, we obtain Γ1p − Γ1m = 0.183 ± 0.035 at Q2 = 10GeV2. This result is in agreement with the Bjorken sum rule which predicts Γ1p − Γ1n = 0.186 ± 0.002 at the same Q2.