Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

Alekseev M, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregisilio A, Badelek B, Balestra F, Ball J, Barth J, Baum G, et al. (2009)
Phys.Lett. B 676(1-3): 31-38.

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Abstract
The gluon polarisation in the nucleon has been determined by detecting charm production via D-0 meson decay to charged K and pi in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb(-1). The dominant underlying process of charm production is the photon-gluon fusion to a c (c) over bar pair. A leading order QCD approach gives an average gluon polarisation of (Delta g/g)(x) = -0.49 +/- 0.27(stat) +/- 0.11 (syst) at a scale mu(2) approximate to 13 (GeV/c)(2) and at an average gluon momentum fraction (x) approximate to 0.11. The longitudinal cross-section asymmetry for D-0 production is presented in bins of the transverse momentum and the energy of the D-0 meson. (C) 2009 Elsevier B.V. All rights reserved.
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Alekseev M, Alexakhin VY, Alexandrov Y, et al. Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Phys.Lett. B. 2009;676(1-3):31-38.
Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregisilio, A., Badelek, B., et al. (2009). Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Phys.Lett. B, 676(1-3), 31-38.
Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregisilio, A., Badelek, B., Balestra, F., Ball, J., Barth, J., et al. (2009). Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Phys.Lett. B 676, 31-38.
Alekseev, M., et al., 2009. Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Phys.Lett. B, 676(1-3), p 31-38.
M. Alekseev, et al., “Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction”, Phys.Lett. B, vol. 676, 2009, pp. 31-38.
Alekseev, M., Alexakhin, V.Y., Alexandrov, Y., Alexeev, G.D., Amoroso, A., Austregisilio, 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., Chapiro, A., Chiosso, M., Chung, S.U., Cicuttin, A., Colantoni, M., Crespo, M.L., Dalla Torre, S., Dafni, T., Das, S., Dasgupta, S.S., Denisov, O.Y., Dhara, L., Diaz, V., Dinkelbach, A.M., Donskov, S.V., Doshita, N., Duic, V., Duennweber, W., Efremov, A., El Alaoui, A., Eversheim, P.D., Eyrich, W., Faessler, M., Ferrero, 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., Gobbo, B., Goertz, S., Grabmueller, S., Grajek, O.A., Grasso, A., Grube, B., Gushterski, R., Guskov, A., Haas, F., Hagemann, R., von Harrach, D., Hasegawa, T., Heckmann, J., Heinsius, F.H., Hermann, R., Herrmann, F., Hess, C., Hinterberger, F., von Hodenberg, M., 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., Kiefer, J., Kisselev, Y., Klein, F., Klimaszewski, K., Koblitz, S., Koivuniemi, J.H., Kolosov, V.N., Komissarov, E.V., Kondo, K., Koenigsmann, K., 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., 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., Maximov, A.N., Meyer, W., Michigami, T., Mikhailov, Y.V., Moinester, M.A., Mutter, A., Nagaytsev, A., Nagel, T., Nassalski, J., Negrini, S., Nerling, F., Neubert, S., Neyret, D., Nikolaenko, V.I., Olshevsky, A.G., Ostrick, M., Padee, A., Panknin, R., Panebianco, S., 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., Reggiani, D., 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., Sbrizza, G., Schiavon, P., Schill, C., Schmitt, L., 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., Teulfel, A., Tkatchev, L.G., Venugopal, G., Virius, M., Vlassov, N.V., Vossen, A., Weitzel, Q., Wenzl, K., Windmolders, R., Wislicki, W., Wollny, H., Zaremba, K., Zavertyaev, M., Zemlyanichkina, E., Ziembicki, M., Zhao, J., Zhuravlev, N., Zvyagin, A.: Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Phys.Lett. B. 676, 31-38 (2009).
Alekseev, M., Alexakhin, V. Yu., Alexandrov, Yu., Alexeev, G. D., Amoroso, A., Austregisilio, 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., Chapiro, A., Chiosso, M., Chung, S. U., Cicuttin, A., Colantoni, M., Crespo, M. L., Dalla Torre, S., Dafni, T., Das, S., Dasgupta, S. S., Denisov, O. Yu., Dhara, L., Diaz, V., Dinkelbach, A. M., Donskov, S. V., Doshita, N., Duic, V., Duennweber, W., Efremov, A., El Alaoui, A., Eversheim, P. D., Eyrich, W., Faessler, M., Ferrero, A., Finger, M., Finger, M., Jr., Fischer, H., Franco, C., Friedrich, J. M., Garfagnini, R., Gautheron, Fabrice, Gavrichtchouk, O. P., Gazda, R., Gerassimov, S., Geyer, R., Giorgi, M., Gobbo, B., Goertz, S., Grabmueller, S., Grajek, O. A., Grasso, A., Grube, B., Gushterski, R., Guskov, A., Haas, F., Hagemann, R., von Harrach, D., Hasegawa, T., Heckmann, J., Heinsius, F. H., Hermann, R., Herrmann, F., Hess, C., Hinterberger, F., von Hodenberg, M., 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., Kiefer, J., Kisselev, Yu., Klein, F., Klimaszewski, K., Koblitz, S., Koivuniemi, J. H., Kolosov, V. N., Komissarov, E. V., Kondo, K., Koenigsmann, K., 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., 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., Maximov, A. N., Meyer, W., Michigami, T., Mikhailov, Yu. V., Moinester, M. A., Mutter, A., Nagaytsev, A., Nagel, T., Nassalski, J., Negrini, S., Nerling, F., Neubert, S., Neyret, D., Nikolaenko, V. I., Olshevsky, A. G., Ostrick, M., Padee, A., Panknin, R., Panebianco, S., 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., Reggiani, D., 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., Sbrizza, G., Schiavon, P., Schill, C., Schmitt, L., 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., Teulfel, A., Tkatchev, L. G., Venugopal, G., Virius, M., Vlassov, N. V., Vossen, A., Weitzel, Q., Wenzl, K., Windmolders, R., Wislicki, W., Wollny, H., Zaremba, K., Zavertyaev, M., Zemlyanichkina, E., Ziembicki, M., Zhao, J., Zhuravlev, N., and Zvyagin, A. “Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction”. Phys.Lett. B 676.1-3 (2009): 31-38.
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