Spin asymmetries A1 and structure functions g1 of the proton and the deuteron from polarized high energy muon scattering

B. Adeva*, T. Akdogan, E. Arik, A. Arvidson, B. Badelek, G. Bardin, G. Baum, P. Berglund, L. Betev, I. G. Bird, R. Birsa, P. Björkholm, N. de Botton, M. Boutemeur, F. Bradamante, A. Bravar, A. Bressan, S. Bültmann, E. Burtin, C. CavataD. 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, C. Fernandez, S. Forthmann, B. Frois, A. Gallas, J. A. Garzon, H. Gilly, M. Giorgi, E. von Goeler, S. Goertz, I. A. Golutvin, G. Gracia, N. de Groot, M. Grosse Perdekamp, K. Haft, 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, A. Karev, H. J. Kessler, T. J. Ketel, J. Kiryluk, I. Kiryushin, A. Kishi, Y. Kisselev, L. Klostermann, D. Krämer, V. 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. Lowe, A. Magnon, G. K. Mallot, F. Marie, A. Martin, J. Martino, T. Matsuda, B. Mayes, J. S. McCarthy, K. Medved, W. Meyer, G. van Middelkoop, D. Miller, Y. Miyachi, K. Mori, J. Moromisato, A. Nagaitsev, J. Nassalski, L. Naumann, T. O. Niinikoski, J. E.J. Oberski, A. Ogawa, C. Ozben, H. Pereira, F. Perrot-Kunne, D. Peshekhonov, R. Piegia, L. Pinsky, S. Platchkov, M. Plo, D. Pose, H. Postma, J. Pretz, R. Puntaferro, T. Pussieux, G. Rädel, A. Rijllart, G. Reicherz, J. Roberts, S. Rock, M. Rodriguez, E. Rondio, L. Ropelewski, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, A. Schiller, K. P. Schüler, R. Seitz, Y. Semertzidis, S. Sergeev, P. Shanahan, E. P. Sichtermann, F. Simeoni, G. I. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. Stuhrmann, M. Szleper, F. Tessarotto, D. Thers, W. Tlaczala, A. Tripet, G. Unel, M. Velasco, J. Vogt, R. Voss, C. Whitten, R. Windmolders, R. Willumeit, W. Wislicki, A. Witzmann, J. Ylöstalo, A. M. Zanetti, K. Zaremba, N. I. Zamiatin, J. Zhao

*Corresponding author for this work

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Abstract

We present the final results of the spin asymmetries A1 and the spin structure functions g1 of the proton and the deuteron in the kinematic range 0.0008<x<0.7 and 0.2<Q2<100 GeV2. For the determination of A1, in addition to the usual method which employs inclusive scattering events and includes a large radiative background at low x, we use a new method which 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 method gives smaller errors for x<0.02, so it is combined with the usual method to provide the optimal set of results.

Original languageEnglish
Article number112001
Pages (from-to)1120011+11200117
JournalPhysical Review D
Volume58
Issue number11
DOIs
Publication statusPublished - 1 Dec 1998
Externally publishedYes

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