The Deuteron Spin-dependent Structure Function $g^{d}_1$ and its First Moment

We present a measurement of the deuteron spin-dependent structure function g^d_1 based on the data collected by the COMPASS experiment at CERN during the years 2002-2004. The data provide an accurate evaluation for \Gamma^d_1, the first moment of g^d_1(x), and for the matrix element of the singlet a...

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Detalles Bibliográficos
Autores principales: Alexakhin, V.Yu., Alexandrov, Yu., Alexeev, G.D., Alexeev, M., Amoroso, A., Balestra, F., Ball, J., Barth, J., Baum, G., Becker, M., Bedfer, Y., Bernet, C., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bressan, A., Brona, G., Burtin, E., Bussa, M.P., Bytchkov, V.N., Chapiro, A., Cicuttin, A., Colantoni, M., Colavita, A.A., Costa, S., Crespo, M.L., d'Hose, N., Dalla Torre, S., Das, S., Dasgupta, S.S., De Masi, R., Dedek, N., Demchenko, D., Denisov, O.Yu., Dhara, L., Diaz, V., Dinkelbach, A.M., Donskov, S.V., Dorofeev, V.A., Doshita, N., Duic, V., Dunnweber, W., Efremov, A., Eversheim, P.D., Eyrich, W., Faessler, M., Fauland, P., Ferrero, A., Ferrero, L., Finger, M., Finger, M., jr., Fischer, H., Franz, J., Friedrich, J.M., Frolov, V., Garfagnini, R., Gautheron, F., Gavrichtchouk, O.P., Gerassimov, S., Geyer, R., Giorgi, M., Gobbo, B., Goertz, S., Gorin, A.M., Grajek, O.A., Grasso, A., Grube, B., Guskov, A., Haas, F., Hannappel, J., von Harrach, D., Hasegawa, T., Hedicke, S., Heinsius, F.H., Hermann, R., Hess, C., Hinterberger, F., von Hodenberg, M., Horikawa, N., Horikawa, S., Horn, I., Ilgner, C., Ioukaev, A.I., Ivanchin, I., Ivanov, O., Iwata, T., Jahn, R., Janata, A., Joosten, R., Jouravlev, N.I., Kabuss, E., Kang, D., Ketzer, B., Khaustov, G.V., Khokhlov, Yu. A., Kisselev, Yu., Klein, F., Klimaszewski, K., Koblitz, S., Koivuniemi, J.H., Kolosov, V.N., Komissarov, E.V., Kondo, K., Konigsmann, K., Konorov, I., Konstantinov, V.F., Korentchenko, A.S., Korzenev, A., Kotzinian, A.M., Koutchinski, N.A., Kouznetsov, O., Kowalik, K., Kramer, D., Kravchuk, N.P., Krivokhizhin, G.V., Kroumchtein, Z.V., Kubart, J., Kuhn, R., Kukhtin, V., Kunne, F., Kurek, K., Ladygin, M.E., Lamanna, M., Le Goff, J.M., Leberig, M., Lednev, A.A., Lehmann, A., Lichtenstadt, J., Liska, T., Ludwig, I., Maggiora, A., Maggiora, M., Magnon, A., Mallot, G.K., Marchand, C., Marroncle, J., Martin, A., Marzec, J., Masek, L., Massmann, F., Matsuda, T., Matthia, D., Maximov, A.N., Meyer, W., Mielech, A., Mikhailov, Yu. V., Moinester, M.A., Nagel, T., Nahle, O., Nassalski, J., Neliba, S., Neyret, D.P., Nikolaenko, V.I., Nikolaev, K., Nozdrin, A.A., Obraztsov, V.F., Olshevsky, A.G., Ostrick, M., Padee, A., Pagano, P., Panebianco, S., Panzieri, D., Paul, S., Peshekhonov, D.V., Peshekhonov, V.D., Piragino, G., Platchkov, S., Pochodzalla, J., Polak, J., Polyakov, V.A., Pontecorvo, G., Popov, A.A., Pretz, J., Procureur, S., Quintans, C., Ramos, S., Reicherz, G., Rondio, E., Rozhdestvensky, A.M., Ryabchikov, D., Samoylenko, V.D., Sandacz, A., Santos, H., Sapozhnikov, M.G., Savin, I.A., Schiavon, P., Schill, C., Schmitt, L., Schroeder, W., Seeharsch, D., Seimetz, M., Setter, D., Shevchenko, O.Yu., Siebert, H.W., Silva, L., Sinha, L., Sissakian, A.N., Slunecka, M., Smirnov, G.I., Sozzi, F., Srnka, A., Stinzing, F., Stolarski, M., Sugonyaev, V.P., Sulc, M., Sulej, R., Tchalishev, V.V., Tessaro, S., Tessarotto, F., Teufel, A., Tkatchev, L.G., Trippel, S., Venugopal, G., Virius, M., Vlassov, N.V., Webb, R., Weise, E., Weitzel, Q., Windmolders, R., Wislicki, W., Zaremba, K., Zavertyaev, M., Zemlyanichkina, E., Zhao, J., Zvyagin, A.
Lenguaje:eng
Publicado: 2006
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2006.12.076
http://cds.cern.ch/record/984659
Descripción
Sumario:We present a measurement of the deuteron spin-dependent structure function g^d_1 based on the data collected by the COMPASS experiment at CERN during the years 2002-2004. The data provide an accurate evaluation for \Gamma^d_1, the first moment of g^d_1(x), and for the matrix element of the singlet axial current, a_0. The results of QCD fits in the next to leading order (NLO) on all g1 deep inelastic scattering data are also presented. They provide two solutions with the gluon spin distribution function \Delta_G positive or negative, which describe the data equally well. In both cases, at Q^2 = 3(GeV/c)^2 the first moment of \Delta G is found to be of the order of 0:2 - 0:3 in absolute value.

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