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  • Evidence for a single-spin ...
    Amarian, M.; Aschenauer, E. C.; Avakian, H.; Avetissian, A.; Avetissian, E.; Bains, B.; Baumgarten, C.; Beckmann, M.; Belostotski, S.; Blouw, J.; Borissov, A.; Bouwhuis, M.; Braun, B.; Bray, B.; Brons, St; Brückner, W.; Bruins, E. E. W.; Carter, P.; Chumney, P.; Cisbani, E.; De Schepper, D.; Devitsin, E.; Di Nezza, P.; Düren, M.; Dvoredsky, A.; Fantoni, A.; Ferstl, M.; Fiedler, K.; Franz, J.; Frullani, S.; Funk, M.-A.; Gharibyan, V.; Graw, G.; Grebeniouk, O.; Green, P. W.; Haas, J. P.; Hansen, J.-O.; Hartig, M.; Hasch, D.; Heinsius, F. H.; Henderson, R.; Hertenberger, R.; Holler, Y.; Iodice, M.; Jgoun, A.; Kaiser, R.; Kitching, P.; Kobayashi, H.; Koch, N.; Königsmann, K.; Kolster, H.; Kozlov, V.; Kramer, L. H.; Kyle, G.; Lorenzon, W.; Martens, F. K.; Martin, J. W.; Mateos, A.; McIlhany, K.; Meissner, F.; Menden, F.; Miller, M. A.; Most, A.; Muccifora, V.; Mussa, R.; Nagaitsev, A.; Naryshkin, Y.; Nathan, A. M.; Nupieri, M.; Ouyang, J.; Owen, B. R.; Potashov, S.; Rakness, G.; Reali, A.; Redwine, R.; Rudnitsky, S.; Schäfer, A.; Schmidt, F.; Schmitt, H.; Schüler, K. P.; Shibata, T.-A.; Shin, T.; Simani, C.; Simon, A.; Sinram, K.; Slavich, P.; Stenger, J.; Stewart, J.; Tallini, H.; Thomas, E.; Tipton, B.; Urciuoli, G. M.; van den Brand, J. F. J.; van de Vyver, R.; van Hunen, J. J.; Vetterli, M. C.; Vikhrov, V.; Visser, J.; Wander, W.; Wise, T.

    Physical review letters, 05/2000, Letnik: 84, Številka: 18
    Journal Article

    Single-spin asymmetries for semi-inclusive pion production in deep-inelastic scattering have been measured for the first time. A significant target-spin asymmetry of the distribution in the azimuthal angle straight phi of the pion relative to the lepton scattering plane was formed for pi(+) electroproduction on a longitudinally polarized hydrogen target. The corresponding analyzing power in the sinstraight phi moment of the cross section is 0.022+/-0.005+/-0.003. This result can be interpreted as the effect of terms in the cross section involving chiral-odd spin distribution functions in combination with a chiral-odd fragmentation function that is sensitive to the transverse polarization of the fragmenting quark.