Spin asymmetries A1 of the proton and the deuteron in the low x and low Q2 region from polarized high energy muon scattering

B. Adeva*, E. Arik, A. Arvidson, B. Badełek, G. Baum, P. Berglund, L. Betev, R. Birsa, N. De Botton, F. Bradamante, A. Bravar, S. Bültmann, E. Burtin, D. Crabb, J. Cranshaw, T. Çuhadar, S. Dalla Torre, R. Van Dantzig, B. Derro, A. DeshpandeS. Dhawan, C. Dulya, S. Eichblatt, D. Fasching, F. Feinstein, C. Fernandez, B. Froise, A. Gallas, J. A. Garzon, H. Gilly, M. Giorgi, S. Goertz, G. Garcia, 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, A. Karev, H. J. Kessler, T. J. Ketel, J. Kiryluk, Yu Kisselev, D. Krämer, W. Kröger, K. Kurek, J. Kyynäräinen, M. Lamanna, U. Landgraf, J. M. Le Goff, F. Lehar, A. De Lesquen, J. Lichtenstadt, M. Litmaath, 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. Nassalski, T. O. Niinikoski, J. E J Oberski, A. Ogawa, C. Ozben, H. Pereira, F. Perrot-Kunne, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Plo, D. Pose, H. Postma, J. Pretz, R. Puntaferro, G. Rädel, G. Reicherz, J. Roberts, M. Rodriguez, E. Rondio, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, E. P. Sichtermann, F. Simeoni, G. I. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. Stuhrmann, F. Tessarotto, D. Thers, W. Tłaczała, A. Tripet, G. Unel, M. Velasco, J. Vogt, R. Voss, C. Whitten, R. Willumeit, R. Windmolders, W. Wiślicki, A. Witzmann, A. M. Zanetti, K. Zaremba, J. Zhao

*Corresponding author for this work

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Abstract

We present the results of the spin asymmetries A1 of the proton and the deuteron in the kinematic region extending down to x=6×10-5 and Q2=0.01 GeV2. The data were taken with a dedicated low x trigger, which required hadron detection in addition to the scattered muon, so as to reduce the background at low x. The results complement our previous measurements and the two sets are consistent in the overlap region. No significant spin effects are found in the newly explored region.

Original languageEnglish (US)
Article number072004
Pages (from-to)1-9
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume60
Issue number7
StatePublished - Oct 1 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Adeva, B., Arik, E., Arvidson, A., Badełek, B., Baum, G., Berglund, P., Betev, L., Birsa, R., De Botton, N., Bradamante, F., Bravar, A., Bültmann, S., Burtin, E., Crabb, D., Cranshaw, J., Çuhadar, T., Dalla Torre, S., Van Dantzig, R., Derro, B., ... Zhao, J. (1999). Spin asymmetries A1 of the proton and the deuteron in the low x and low Q2 region from polarized high energy muon scattering. Physical Review D - Particles, Fields, Gravitation and Cosmology, 60(7), 1-9. [072004].