Measurement of the spin-dependent structure function $g_{1}(x)$ of the proton

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Abstract : We have measured the spin-dependent structure function g_1^p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003<x<0.7 and 1\,\mbox{GeV}^2<Q^2<60\,\mbox{GeV}^2. Its first moment, \int_0^1 g_1^p(x) dx , is found to b...

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Detalles Bibliográficos
Autores principales: Adams, D., Adeva, B., Arik, E., Arvidson, A., Badelek, B., Ballintijn, M.K., Bardin, G., Baum, Guenter, Berglund, P., Betev, L., Bird, I.G., Birsa, R., Bjorkholm, P., Bonner, B.E., de Botton, N., Bradamante, F., Bressan, A., Brull, A., Bueltmann, Stephen L., Burtin, E., Cavata, C., Clocchiatti, M., Corcoran, M.D., Crabb, D., Cranshaw, J., Crawford, M., Cuhadar, T., Dalla Torre, S., van Dantzig, R., Dhawan, S., Dulya, C., Dyring, A., Eichblatt, S., Faivre, J.C., Fasching, D., Feinstein, F., Fernandez, C., Frois, B., Garzon, J.A., Gaussiran, T., Giorgi, M., von Goeler, E., Gracia, G., de Groot, N., Grosse Perdekamp, M., Gulmez, Erhan, von Harrach, D., Hasegawa, T., Hautle, P., Hayashi, N., Heusch, C.A., Horikawa, N., Hughes, V.W., Igo, G., Ishimoto, S., Iwata, T., Kabuss, E.M., Kaiser, R., Karev, A., Kessler, H.J., Ketel, T.J., Kishi, A., Kiselev, Yu., Klostermann, L., Kramer, D., Krivokhijine, V., Kukhtin, V., Kyynarainen, J., Lamanna, M., Landgraf, U., Lau, K., Layda, T., Le Goff, J.M., Lehar, F., de Lesquen, A., Lichtenstadt, J., Lindqvist, T., Litmaath, M., Lopez-Ponte, S., Lowe, M., Magnon, A., Mallot, G.K., Marie, F., Martin, A., Martino, J., Matsuda, T., Mayes, B., McCarthy, J.S., Medved, K., van Middelkoop, G., Miller, D., Mori, K., Moromisato, J., Nagaitsev, A., Nassalski, J., Naumann, L., Niinikoski, T.O., Oberski, J.E.J., Parks, D.P., Penzo, A., Perez, G., Kunne, F., Peshekhonov, D., Piegaia, R., Pinsky, Lawrence S., Platchkov, S., Plo, M., Pose, D., Postma, H., Pretz, J., Pussieux, T., Pyrlik, J., Reyhancan, I., Rieubland, J.M., Rijllart, A., Roberts, J.B., Rock, S., Rodriguez, M., Rondio, E., Rosado, A., Sabo, I., Saborido, J., Sandacz, A., Savin, Igor A., Schiavon, P., Schuler, P., Segel, R., Seitz, R., Semertzidis, Y., Sever, F., Shanahan, P., Shumeiko, N., Smirnov, G., Staude, A., Steinmetz, A., Stiegler, U., Stuhrmann, H., Teichert, K.M., Tessarotto, F., Velasco, M., Vogt, J., Voss, R., Weinstein, R., Whitten, C., Windmolders, R., Willumeit, R., Wislicki, W., Witzmann, A., Zanetti, A.M., Zhao, J.
Lenguaje:eng
Publicado: 1994
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(94)90793-5
https://dx.doi.org/10.1016/0370-2693(94)90629-7
http://cds.cern.ch/record/261944
Descripción
Sumario:Abstract : We have measured the spin-dependent structure function g_1^p of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003<x<0.7 and 1\,\mbox{GeV}^2<Q^2<60\,\mbox{GeV}^2. Its first moment, \int_0^1 g_1^p(x) dx , is found to be 0.136 \pm 0.011\,(\mbox{stat.})\pm 0.011\ (\mbox{syst.}) at Q^2=10\,\mbox{GeV}^2. This value is smaller than the prediction of the Ellis--Jaffe sum rule by two standard deviations, and is consistent with previous measurements. A combined analysis of all available proton, deuteron and neutron data confirms the Bjorken sum rule to within 10\% of the theoretical value.

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