The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule

Alekseev MG, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregesilo A, Badelek B, Balestra F, Ball J, Barth J, Baum G, et al. (2010)
Phys.Lett. B 690(5): 466-472.

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Abstract
The inclusive double-spin asymmetry. A(1)(p), has been measured at COMPASS in deep-inelastic polarised muon scattering off a large polarised NH3 target. The data, collected in the year 2007, cover the range Q(2) > 1 (GeV/c)(2), 0.004 < x < 0.7 and improve the statistical precision of g(1)(p)(x) by a factor of two in the region x < 0.02. The new proton asymmetries are combined with those previously published for the deuteron to extract the non-singlet spin-dependent structure function g(1)(NS)(x. Q(2)). The isovector quark density, Delta q(3)(x, Q(2)), is evaluated from a NLO QCD fit of g(1)(NS). The first moment of Delta q(3) is in good agreement with the value predicted by the Bjorken sum rule and corresponds to a ratio of the axial and vector coupling constants vertical bar g(A)/g(V)vertical bar = 1.28 +/- 0.07 (stat.) +/- 0.10 (syst.). (C) 2010 Elsevier B.V. All rights reserved.
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Alekseev MG, Alexakhin VY, Alexandrov Y, et al. The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule. Phys.Lett. B. 2010;690(5):466-472.
Alekseev, M. G., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregesilo, A., Badelek, B., et al. (2010). The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule. Phys.Lett. B, 690(5), 466-472.
Alekseev, M. G., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregesilo, A., Badelek, B., Balestra, F., Ball, J., Barth, J., et al. (2010). The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule. Phys.Lett. B 690, 466-472.
Alekseev, M.G., et al., 2010. The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule. Phys.Lett. B, 690(5), p 466-472.
M.G. Alekseev, et al., “The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule”, Phys.Lett. B, vol. 690, 2010, pp. 466-472.
Alekseev, M.G., Alexakhin, V.Y., Alexandrov, Y., Alexeev, G.D., Amoroso, A., Austregesilo, A., Badelek, B., Balestra, F., Ball, J., Barth, J., Baum, G., Bedfer, Y., Bernhard, J., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bravar, A., Bressan, A., Brona, G., Burtin, E., Bussa, M.P., Chaberny, D., Cotic, D., Chiosso, M., Chung, S.U., Cicuttin, A., Colantoni, M., Crespo, M.L., Dalla Torre, S., Das, S., Dasgupta, S.S., Denisov, O.Y., Dhara, L., Diaz, V., Donskov, S.V., Doshita, N., Duic, V., Duennweber, W., Efremov, A., El Alaoui, A., Eversheim, P.D., Eyrich, W., Faessler, M., Ferrero, A., Filin, A., Finger, M., Finger, M., J., Fischer, H., Franco, C., Friedrich, J.M., Garfagnini, R., Gautheron, F., Gavrichtchouk, O.P., Gazda, R., Gerassimov, S., Geyer, R., Giorgi, M., Gnesi, I., Gobbo, B., Goertz, S., Grabmueller, S., Grasso, A., Grube, B., Gushterski, R., Guskov, A., Haas, F., von Harrach, D., Hasegawa, T., Heinsius, F.H., Hermann, R., Herrmann, F., Hess, C., Hinterberger, F., Horikawa, N., Hoeppner, C., d'Hose, N., Ilgner, C., Ishimoto, S., Ivanov, O., Ivanshin, Y., Iwata, T., Jahn, R., Jasinski, P., Jegou, G., Joosten, R., Kabuss, E., Kaefer, W., Kang, D., Ketzer, B., Khaustov, G.V., Khokhlov, Y.A., Kisselev, Y., Klein, F., Klimaszewski, K., Koblitz, S., Koivuniemi, J.H., Kolosovu, V.N., Kondo, K., Koenigsmann, K., Konopka, R., Konorov, I., Konstantinov, V.F., Korzenev, A., Kotzinian, A.M., Kouznetsov, O., Kowalik, K., Kraemer, M., Kral, A., Kroumchtein, Z.V., Kuhn, R., Kunne, F., Kurek, K., Lauser, L., Le Goff, J.M., Lednev, A.A., Lehmann, A., Levorato, S., Lichtenstadt, J., Liska, T., Maggiora, A., Maggiora, M., Magnon, A., Mallot, G.K., Mann, A., Marchand, C., Marroncle, J., Martin, A., Marzec, J., Massmann, F., Matsuda, T., Meyer, W., Michigami, T., Mikhailov, Y.V., Moinester, M.A., Mutter, A., Nagaytsev, A., Nagel, T., Nassalski, J., Negrini, T., Nerling, F., Neubert, S., Neyret, D., Nikolaenko, V.I., Nunes, A.S., Olshevsky, A.G., Ostrick, M., Padee, A., Panknin, R., Panzieri, D., Parsamyan, B., Paul, S., Pawlukiewicz-Kaminska, B., Perevalova, E., Pesaro, G., Peshekhonov, D.V., Piragino, G., Platchkov, S., Pochodzalla, J., Polak, J., Polyakov, V.A., Pontecorvo, G., Pretz, J., Quintans, C., Rajotte, J.-F., Ramos, S., Rapatsky, V., Reicherz, G., Richter, A., Robinet, F., Rocco, E., Rondio, E., Ryabchikov, D.I., Samoylenko, V.D., Sandacz, A., Santos, H., Sapozhnikov, M.G., Sarkar, S., Savin, I.A., Sbrizzai, G., Schiavon, P., Schill, C., Schlueter, T., Schmitt, L., Schopferer, S., Schroeder, W., Shevchenko, O.Y., Siebert, H.-W., Silva, L., Sinha, L., Sissakian, A.N., Slunecka, M., Smirnov, G.I., Sosio, S., Sozzi, F., Srnka, A., Stolarski, M., Sulc, M., Sulej, R., Takekawa, S., Tessaro, S., Tessarotto, F., Teufel, A., Tkatchev, L.G., Uhl, S., Uman, I., Virius, M., Vlassov, N.V., Vossen, A., Weitzel, Q., Windmolders, R., Wislicki, W., Wollny, H., Zaremba, K., Zavertyaev, M., Zemlyanichkina, E., Ziembicki, M., Zhao, J., Zhuravlev, N., Zvyagin, A.: The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule. Phys.Lett. B. 690, 466-472 (2010).
Alekseev, M. G., Alexakhin, V. Yu, Alexandrov, Yu, Alexeev, G. D., Amoroso, A., Austregesilo, A., Badelek, B., Balestra, F., Ball, J., Barth, J., Baum, Günter, Bedfer, Y., Bernhard, J., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bravar, A., Bressan, A., Brona, G., Burtin, E., Bussa, M. P., Chaberny, D., Cotic, D., Chiosso, M., Chung, S. U., Cicuttin, A., Colantoni, M., Crespo, M. L., Dalla Torre, S., Das, S., Dasgupta, S. S., Denisov, O. Yu, Dhara, L., Diaz, V., Donskov, S. V., Doshita, N., Duic, V., Duennweber, W., Efremov, A., El Alaoui, A., Eversheim, P. D., Eyrich, W., Faessler, M., Ferrero, A., Filin, A., Finger, M., Finger, M., Jr., Fischer, H., Franco, C., Friedrich, J. M., Garfagnini, R., Gautheron, F., Gavrichtchouk, O. P., Gazda, R., Gerassimov, S., Geyer, R., Giorgi, M., Gnesi, I., Gobbo, B., Goertz, S., Grabmueller, S., Grasso, A., Grube, B., Gushterski, R., Guskov, A., Haas, F., von Harrach, D., Hasegawa, T., Heinsius, F. H., Hermann, R., Herrmann, F., Hess, C., Hinterberger, F., Horikawa, N., Hoeppner, Ch, d'Hose, N., Ilgner, C., Ishimoto, S., Ivanov, O., Ivanshin, Yu, Iwata, T., Jahn, R., Jasinski, P., Jegou, G., Joosten, R., Kabuss, E., Kaefer, W., Kang, D., Ketzer, B., Khaustov, G. V., Khokhlov, Yu A., Kisselev, Yu, Klein, F., Klimaszewski, K., Koblitz, S., Koivuniemi, J. H., Kolosovu, V. N., Kondo, K., Koenigsmann, K., Konopka, R., Konorov, I., Konstantinov, V. F., Korzenev, A., Kotzinian, A. M., Kouznetsov, O., Kowalik, K., Kraemer, M., Kral, A., Kroumchtein, Z. V., Kuhn, R., Kunne, F., Kurek, K., Lauser, L., Le Goff, J. M., Lednev, A. A., Lehmann, A., Levorato, S., Lichtenstadt, J., Liska, T., Maggiora, A., Maggiora, M., Magnon, A., Mallot, G. K., Mann, A., Marchand, C., Marroncle, J., Martin, A., Marzec, J., Massmann, F., Matsuda, T., Meyer, W., Michigami, T., Mikhailov, Yu V., Moinester, M. A., Mutter, A., Nagaytsev, A., Nagel, T., Nassalski, J., Negrini, T., Nerling, F., Neubert, S., Neyret, D., Nikolaenko, V. I., Nunes, A. S., Olshevsky, A. G., Ostrick, M., Padee, A., Panknin, R., Panzieri, D., Parsamyan, B., Paul, S., Pawlukiewicz-Kaminska, B., Perevalova, E., Pesaro, G., Peshekhonov, D. V., Piragino, G., Platchkov, S., Pochodzalla, J., Polak, J., Polyakov, V. A., Pontecorvo, G., Pretz, J., Quintans, C., Rajotte, J. -F., Ramos, S., Rapatsky, V., Reicherz, G., Richter, A., Robinet, F., Rocco, E., Rondio, E., Ryabchikov, D. I., Samoylenko, V. D., Sandacz, A., Santos, H., Sapozhnikov, M. G., Sarkar, S., Savin, I. A., Sbrizzai, G., Schiavon, P., Schill, C., Schlueter, T., Schmitt, L., Schopferer, S., Schroeder, W., Shevchenko, O. Yu, Siebert, H. -W., Silva, L., Sinha, L., Sissakian, A. N., Slunecka, M., Smirnov, G. I., Sosio, S., Sozzi, F., Srnka, A., Stolarski, M., Sulc, M., Sulej, R., Takekawa, S., Tessaro, S., Tessarotto, F., Teufel, A., Tkatchev, L. G., Uhl, S., Uman, I., Virius, M., Vlassov, N. V., Vossen, A., Weitzel, Q., Windmolders, R., Wislicki, W., Wollny, H., Zaremba, K., Zavertyaev, M., Zemlyanichkina, E., Ziembicki, M., Zhao, J., Zhuravlev, N., and Zvyagin, A. “The spin-dependent structure function of the proton g(1)(p) and a test of the Bjorken sum rule”. Phys.Lett. B 690.5 (2010): 466-472.
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