Spin structure of the proton from polarized inclusive deep-inelastic muon-proton scattering

D. Adams, B. Adeva, E. Arik, A. Arvidson, B. Badelek, M. K. Ballintijn, G. Bardin, G. Baum, P. Berglund, L. Betev, I. G. Bird, R. Birsa, P. Björkholm, B. E. Bonner, N. de Botton, M. Boutemeur, F. Bradamante, A. Bravar, A. Bressan, S. BültmannE. Burtin, C. Cavata, D. 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, B. Frois, A. Gallas, J. A. Garzon, 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. Kabuß, A. Karev, H. J. Kessler, T. J. Ketel, A. Kishi, Yu Kisselev, L. Klostermann, D. Krämer, V. Krivokhijine, W. Kröger, K. Kurek, J. Kyynäräinen, M. Lamanna, U. Landgraf, T. Layda, 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, G. van Middelkoop, D. Miller, K. Mori, J. Moromisato, A. Nagaitsev, J. Nassalski, L. Naumann, T. O. Niinikoski, J. E.J. Oberski, A. Ogawa, C. Ozben, D. P. Parks, A. Penzo, F. Perrot-Kunne, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Plo, D. Pose, H. Postma, J. Pretz, T. Pussieux, J. Pyrlik, I. Reyhancan, A. Rijllart, J. B. Roberts, S. Rock, M. Rodriguez, E. Rondio, A. Rosado, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, K. P. Schüler, R. Segel, R. Seitz, Y. Semertzidis, F. Sever, P. Shanahan, E. P. Sichtermann, F. Simeoni, G. I. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. Stuhrmann, M. Szleper, K. M. Teichert, F. Tessarotto, W. Tlaczala, S. Trentalange, G. Unel, M. Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, R. Windmolders, R. Willumeit, W. Wislicki, A. Witzmann, A. M. Zanetti, K. Zaremba, J. Zhao

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Özet

We have measured the spin-dependent structure function [Formula presented] in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range [Formula presented] and [Formula presented] A next-to-leading order QCD analysis is used to evolve the measured [Formula presented] to a fixed [Formula presented] The first moment of [Formula presented] at [Formula presented] is [Formula presented] (stat) [Formula presented] (syst) [Formula presented] (evol). This result is below the prediction of the Ellis-Jaffe sum rule by more than two standard deviations. The singlet axial charge [Formula presented] is found to be [Formula presented] In the Adler-Bardeen factorization scheme, [Formula presented] is required to bring ΔΣ in agreement with the quark-parton model. A combined analysis of all available proton, deuteron, and [Formula presented] data confirms the Bjorken sum rule.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)5330-5358
Sayfa sayısı29
DergiPhysical Review D - Particles, Fields, Gravitation and Cosmology
Hacim56
Basın numarası9
DOI'lar
Yayın durumuYayınlandı - 1997

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