NUK - logo
E-viri
Recenzirano Odprti dostop
  • Leading order determination...
    Adolph, C.; Alexakhin, V.Yu; Antonov, A.A.; Austregesilo, A.; Badełek, B.; Balestra, F.; Bernhard, J.; Bisplinghoff, J.; Bordalo, P.; Bradamante, F.; Bravar, A.; Chaberny, D.; Cicuttin, A.; Das, S.; Donskov, S.V.; Doshita, N.; Efremov, A.; Elia, C.; Eversheim, P.D.; Eyrich, W.; Faessler, M.; Filin, A.; du Fresne von Hohenesche, N.; Garfagnini, R.; Gazda, R.; Gerassimov, S.; Giorgi, M.; Gnesi, I.; Grabmüller, S.; Grasso, A.; Grube, B.; Haas, F.; von Harrach, D.; Heinsius, F.H.; Herrmann, F.; Heß, C.; Hinterberger, F.; Horikawa, N.; dʼHose, N.; Huber, S.; Ivanshin, Yu; Iwata, T.; Khaustov, G.V.; Klein, F.; Kolosov, V.N.; Kotzinian, A.M.; Kroumchtein, Z.V.; Kunne, F.; Kurek, K.; Lehmann, A.; Levorato, S.; Maggiora, A.; Magnon, A.; Makke, N.; Mann, A.; Marchand, C.; Martin, A.; Marzec, J.; Matsuda, T.; Michigami, T.; Mutter, A.; Neyret, D.; Nikolaenko, V.I.; Olshevsky, A.G.; Panknin, R.; Panzieri, D.; Paul, S.; Perevalova, E.; Pesaro, G.; Piragino, G.; Platchkov, S.; Pochodzalla, J.; Polyakov, V.A.; Pontecorvo, G.; Pretz, J.; Quaresma, M.; Reicherz, G.; Rossiyskaya, N.S.; Sandacz, A.; Sapozhnikov, M.G.; Sarkar, S.; Schill, C.; Schmidt, K.; Schönning, K.; Schott, M.; Shevchenko, O.Yu; Sinha, L.; Slunecka, M.; Smirnov, G.I.; Sosio, S.; Sozzi, F.; Stolarski, M.; Sulej, R.; Takekawa, S.; Tessaro, S.; Uhl, S.; Uman, I.; Wang, L.; Ziembicki, M.; Zvyagin, A.

    Physics letters. B, 01/2013, Letnik: 718, Številka: 3
    Journal Article

    We present a determination of the gluon polarisation Δg/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q2>1 (GeV/c)2 including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised LiD6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction xg covering the range 0.04<xg<0.27. The values obtained at leading order in QCD do not show any significant dependence on xg. Their average is Δg/g=0.125±0.060 (stat.)±0.063 (syst.) at average xg=0.09 and a scale of μ2=3 (GeV/c)2.