Spin asymmetries A(1) and structure functions g(1) of the proton and the deuteron from polarized high energy muon scattering - art. no. 112001

Adeva, B Akdogan, T Arik, E Arvidson, A Badelek, B Bardin, G Baum, G Berglund, P Betev, L Bird, IG Birsa, R Bjorkholm, P de Botton, N Boutemeur, M Bradamante, F Bravar, A Bressan, A Bultmann, S Burtin, E Cavata, C Crabb, D Cranshaw, J Cuhadar, T Dalla Torre, S van Dantzig, R Derro, B Deshpande, A Dhawan, S Dulya, C Dyring, A Eichblatt, S Faivre, JC Fasching, D Feinstein, F Fernandez, C Forthmann, S Frois, B Gallas, A Garzon, JA Gilly, H Giorgi, M von Goeler, E Goertz, S Golutvin, IA Gracia, G de Groot, N Perdekamp, MG Haft, K von Harrach, D Hasegawa, T Hautle, P Hayashi, N Heusch, CA Horikawa, N Hughes, VW Igo, G Ishimoto, S Iwata, T Kabuss, EM Kageya, T Karev, A Kessler, HJ Ketel, TJ Kiryluk, J Kiryushin, I Kishi, A Kisselev, Y Klostermann, L Kramer, D Krivokhijine, V Kroger, W Kukhtin, V Kurek, K Kyynarainen, J Lamanna, M Landgraf, U Le Goff, JM Lehar, F de Lesquen, A Lichtenstadt, J Lindqvist, T Litmaath, N Lowe, M Magnon, A Mallot, GK Marie, F Martin, A Martino, J Matsuda, T Mayes, B McCarthy, JS Medved, K Meyer, W van Middelkoop, G Miller, D Miyachi, Y Mori, K Moromisato, J Nagaitsev, A Nassalski, J Naumann, L Niinikoski, TO Oberski, JEJ Ogawa, A Ozben, C Pereira, H Perrot-Kunne, F Peshekhonov, D Piegia, R Pinsky, L Platchkov, S Plo, M Pose, D Postma, H Pretz, J Puntaferro, R Pussieux, T Radel, G Rijllart, A Reicherz, G Roberts, J Rock, S Rodriguez, M Rondio, E Ropelewski, L Sabo, I Saborido, J Sandacz, A Savin, I Schiavon, P Schiller, A Schuler, KP Seitz, R Semertzidis, Y Sergeev, S Shanahan, P Sichtermann, EP Simeoni, F Smirnov, GI Staude, A Steinmetz, A Stiegler, U Stuhrmann, H Szleper, M Tessarotto, F Thers, D Tlaczala, W Tripet, A Unel, G Velasco, M Vogt, J Voss, R Whitten, C Windmolders, R Willumeit, R Wislicki, W Witzmann, A Ylostalo, J Zanetti, AM Zaremba, K Zamiatin, NI Zhao, J

B. Adeva et al., Spin asymmetries A(1) and structure functions g(1) of the proton and the deuteron from polarized high energy muon scattering - art. no. 112001, PHYS REV D, 5811(11), 1998, pp. 2001

52

INGLESE

Article

Physics

PHYSICAL REVIEW D

0556-2821 → ACNP

5811

11

1998

ISI

0556-2821(199812)5811:11<2001:SAAASF>2.0.ZU;2-N

We present the final results of the spin asymmetries A(1) and the spin stru cture functions g(1) of the proton and the deuteron in the kinematic range 0.0008 < x < 0.7 and 0.2 < Q(2) < 100 GeV2. For the determination of A(1), in addition to the usual method which employs inclusive scattering events a nd includes a large radiative background at low x, we use a new method whic h minimizes the radiative background by selecting events with at least one hadron as well as a muon in the final state. We find that this hadron metho d gives smaller errors for x < 0.02, so it is combined with the usual metho d to provide the optimal set of results. [S0556-2821(98)07017-9].