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

1993; Elsevier BV; Volume: 302; Issue: 4 Linguagem: Inglês

10.1016/0370-2693(93)90438-n

1873-2445

B. Adeva, S. Ahmad, A. Arvidson, B. Badełek, M. Ballintijn, 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. Bressan, A. Brüll, J. Buchanan, S. Bültmann, E. Burtin, C. Cavata, J.P. Chen, J.M. Clement, M. Clocchiatti, M. Corcoran, Donald G. Crabb, J. Cranshaw, T. Çuhadar, S. Dalla Torre, R. van Dantzig, Donal B. Day, S. Dhawan, C. Dulya, A. Dyring, S. Eichblatt, J.C. Faivre, D. Fasching, F. Feinstein, Christian Fernandéz, B. Frois, C. Garabatos, J. A. Garzón, L. Gatignon, T. Gaussiran, M. Giorgi, E. von Goeler, I.A. Goloutvin, A. Gómez, G. Gracia, M. Große Perdekamp, W. Grübler, D. von Harrach, T. Hasegawa, P. Hautle, N. Hayashi, C. A. Heusch, N. Horikawa, V. W. Hughes, G. Igo, S. Ishimoto, T. Iwata, M. de Jong, E.M. Kabuß, R. Kaiser, A. Karev, H.J. Kessler, T. Ketel, I. Kiryushin, A. Kishi, Yu. Kisselev, L. Klostermann, W. Knop, V. G. Krivokhijine, V. Kukhtin, J. Kyynäräinen, M. Lamanna, U. Landgraf, K. Lau, T. Layda, F. Lehar, A. de Lesquen, J. Lichtenstadt, T. Lindqvist, M. Litmaath, S. Lopez-Ponte, M. Löwe, A. Magnon, G.K. Mallot, F. Marie, A. Martin, J. Martino, B. Mayes, J. S. McCarthy, G. van Middelkoop, D. H. Miller, Jason W. Mitchell, K. Mori, J. Moromisato, G. S. Mutchler, J. Nassalski, L. Naumann, B.S. Neganov, T. Niinikoski, J.E.J. Oberski, S. Okumi, A. Penzo, G. Perez, F. Perrot-Kunne, D. V. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Pló, D. Pose, H. Postma, T. Pussieux, J. Pyrlik, J.M. Rieubland, A. Rijllart, J. B. Roberts, Miguel Á. Rodríguez, E. Rondio, L. Ropelewski, A. Rosado, I. Sabo, J. Saborido, G. Salvato, A. Sandacz, D. A. Sanders, I. Savin, P. Schiavon, P. Schüler, R. E. Segel, R. Seitz, С. В. Сергеев, F. Sever, P. Shanahan, G.I. Smirnov, A. Staude, A. Steinmetz, H. B. Stuhrmann, K.M. Teichert, F. Tessarotto, Walter Thiel, S. Trentalange, Y. Tzamouranis, M. Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, R. Windmolders, W. Wiślicki, A. Witzmann, A. Yáñez, N. Zamiatin, A. Zanetti,

High-Energy Particle Collisions Research

We report on the first measurement of the spin-dependent structure function g1d of the deuteron in the deep inelastic scattering of polarised muons off polarised deuterons, in the kinematical range 0.006<x<0.6, 1 GeV2<Q2<30 GeV2. The first moment, Γ1d=ʃ01 g1d dx=0.023±0.020 (stat.) ± 0.015 (syst.), is smaller than the prediction of the Ellis-Jaffe sum rules. Using earlier measurements of g1p, we infer the first moment of the spin-dependent neutron structure function g1n. The difference Γ1p−Γ1n=0.20±0.05 (stat.) ± 0.04 (syst.) agrees with the prediction of the Bjorken sum rule, Γ1p−Γ1n=0.191±0.002.