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Spin asymmetry $A^d_1$ and the spin-dependent structure function $g^d_1$ of the deuteron at low values of $x$ and $Q^2$

We present a precise measurement of the deuteron longitudinal spin asymmetry $A_1^d$ and of the deuteron spin-dependent structure function $g_1^d$ at $Q^2 < $ 1~(GeV/$c$)$^2$ and $4\cdot$10$^{-5} < x < $~2.5$\cdot$10$^{-2}$ based on the data collected by the COMPASS experiment at CERN durin...

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Detalles Bibliográficos
Autores principales: Ageev, E.S., Alexakhin, V.Yu., Alexandrov, Yu., Alexeev, G.D., Amoroso, A., Badelek, B., Balestra, F., Ball, J., Baum, G., Bedfer, Y., Berglund, P., Bernet, C., Bertini, R., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bravar, A., Bressan, A., Burtin, E., Bussa, M.P., Bytchkov, V.N., Cerini, L., Chapiro, A., Cicuttin, A., Colantoni, M., Colavita, A.A., Costa, S., Crespo, M.L., d'Hose, N., Dalla Torre, S., Dasgupta, S.S., De Masi, R., Dedek, N., Denisov, O.Yu., Dhara, L., Diaz Kavka, V., Dinkelbach, A.M., Dolgopolov, A.V., Donskov, S.V., Dorofeev, V.A., Doshita, N., Duic, V., Dunnweber, W., Ehlers, J., Eversheim, P.D., Eyrich, W., Fabro, M., Faessler, M., Falaleev, V., Fauland, P., Ferrero, A., Ferrero, L., Finger, M., Finger, M., Jr., Fischer, H., Franz, J., Friedrich, J.M., Frolov, V., Fuchs, U., 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., Grunemaier, A., Hannappel, J., von Harrach, D., Hasegawa, T., Hedicke, S., Heinsius, F.H., Hermann, R., He, C., Hinterberger, F., von Hodenberg, M., Horikawa, N., Horikawa, S., Ijaduola, R.B., Ilgner, C., Ioukaev, A.I., Ishimoto, S., Ivanov, O., Iwata, T., Jahn, R., Janata, A., Joosten, R., Jouravlev, N.I., Kabuss, E., Kalinnikov, V., Kang, D., Karstens, F., Kastaun, W., Ketzer, B., Khaustov, G.V., Khokhlov, Yu.A., Khomutov, N.V., Kisselev, Yu., Klein, F., Koblitz, S., Koivuniemi, J.H., Kolosov, V.N., Komissarov, E.V., Kondo, K., Konigsmann, Kay, Konoplyannikov, A.K., Konorov, I., Konstantinov, V.F., Korentchenko, A.S., Korzenev, A., Kotzinian, A.M., Koutchinski, N.A., Kowalik, K., Kravchuk, N.P., Krivokhizhin, G.V., Kroumchtein, Z.V., Kuhn, R., Kunne, F., Kurek, K., Ladygin, M.E., Lamanna, M., Le Goff, J.M., Leberig, M., Lichtenstadt, J., Liska, T., Ludwig, I., Maggiora, A., Maggiora, M., Magnon, A., Mallot, G.K., Manuilov, I.V., Marchand, C., Marroncle, J., Martin, A., Marzec, J., Matsuda, T., Maximov, A.N., Medved, K.S., Meyer, W., Mielech, A., Mikhailov, Yu.V., Moinester, M.A., Nahle, O., Nassalski, J., Neliba, S., Neyret, D.P., Nikolaenko, V.I., Nozdrin, A.A., Obraztsov, V.F., Olshevsky, A.G., Ostrick, M., Padee, A., Pagano, P., Panebianco, S., Panzieri, D., Paul, S., Pereira, H.D., Peshekhonov, D.V., Peshekhonov, V.D., Piragino, G., Platchkov, S., Platzer, K., Pochodzalla, J., Polyakov, V.A., Popov, A.A., Pretz, J., Quintans, C., Ramos, S., Rebourgeard, P.C., Reicherz, G., Reymann, J., Rith, K., Rozhdestvensky, A.M., Rondio, E., Sadovski, A.B., Saller, E., Samoylenko, V.D., Sandacz, A., Sans, M., Sapozhnikov, M.G., Savin, Igor A., Schiavon, P., Schill, C., Schmidt, T., Schmitt, H., Schmitt, L., Shevchenko, O.Yu., Shishkin, A.A., Siebert, H.-W., Sinha, L., Sissakian, A.N., Skachkova, A., Slunecka, M., Smirnov, G.I., Sozzi, F., Sugonyaev, V.P., Srnka, A., Stinzing, F., Stolarski, M., Sulc, M., Sulej, R., Takabayashi, N., Tchalishev, V.V., Tessarotto, F., Teufel, A., Thers, D., Tkatchev, L.G., Toeda, T., Tretyak, V.I., Trusov, Sergey V., Varanda, M., Virius, M., Vlassov, N.V., Wagner, M., Webb, R., Weise, E., Weitzel, Q., Wiedner, U., Wiesmann, M., Windmolders, R., Wirth, S., Wislicki, W., Zanetti, A.M., Zaremba, K., Zhao, J., Ziegler, R., Zvyagin, A.
Lenguaje:eng
Publicado: 2006
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2007.02.034
http://cds.cern.ch/record/1009470
Descripción
Sumario:We present a precise measurement of the deuteron longitudinal spin asymmetry $A_1^d$ and of the deuteron spin-dependent structure function $g_1^d$ at $Q^2 < $ 1~(GeV/$c$)$^2$ and $4\cdot$10$^{-5} < x < $~2.5$\cdot$10$^{-2}$ based on the data collected by the COMPASS experiment at CERN during the years 2002 and 2003. The statistical precision is tenfold better than that of the previous measurement in this region. The measured $A_1^d$ and $g_1^d$ are found to be consistent with zero in the whole range of $x$.