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Spin asymmetry in muon-proton deep inelastic scattering on a transversely-polarized target

1994; Elsevier BV; Volume: 336; Issue: 1 Linguagem: Inglês

10.1016/0370-2693(94)00968-6

1873-2445

D. L. Adams, B. Adeva, E. Arık, 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, F. Bradamante, A. Bressan, A. Brüll, S. Bültmann, E. Burtin, C. Cavata, M. Clocchiatti, M. Corcoran, Donald G. 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, Christian Fernandéz, B. Frois, J. A. Garzón, 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. Kabuβ, R. Kaiser, A. Karev, H.J. Kessler, T. Ketel, A. Kishi, Yu. Kisselev, L. Klostermann, D. Krämer, V. G. Krivokhijine, V. Kukhtin, J. Kyynäräinen, M. Lamanna, U. Landgraf, K. Lau, T. Layda, J.M. Le Goff, 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, 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, Drew Parks, A. Penzo, Carlos A. Pérez, F. Perrot-Kunne, D. V. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Pló, D. Pose, H. Postma, J. Pretz, T. Pussieux, J. Pyrlik, İskender Atilla Reyhancan, J.M. Rieubland, A. 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. E. Segel, R. Seitz, Yannis K. Semertzidis, F. Sever, P. Shanahan, N. Shumeiko, G.I. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. B. Stuhrmann, K.M. Teichert, F. Tessarotto, Mayda Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, R. Windmolders, Regine Willumeit‐Römer, W. Wiślicki, A. Witzmann, A. Zanetti, J. Zhao,

Dark Matter and Cosmic Phenomena

We measured the spin asymmetry in the scattering of 100 GeV longitudinally-polarized muons on transversely polarized protons. The asymmetry was found to be compatible with zero in the kinematic range 0.006 < x < 0.6, 1 < Q2 < 30GeV2. From this result we derive the upper limits for the virtual photon-proton asymmetry A2, and for the spin structure function g2. For x < 0.15, A2 is significantly smaller than its positivity limit √R.