/ Experiment-HEP arXiv:0906.3918


Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering


Airapetian, A. ; Akopov, N. ; Akopov, Z. ; Aschenauer, E.C. ; Augustyniak, W. ; Avetissian, A. ; Avetisyan, E. ; Bacchetta, A. ; Ball, B. ; Bianchi, N. ; Blok, H.P. ; Bottcher, H. ; Bonomo, C. ; Borissov, A. ; Bryzgalov, V. ; Burns, J. ; Capiluppi, M. ; Capitani, G.P. ; Cisbani, E. ; Ciullo, G. ; Contalbrigo, M. ; Dalpiaz, P.F. ; Deconinck, W. ; De Leo, R. ; De Nardo, L. ; De Sanctis, E. ; Diefenthaler, M. ; Di Nezza, P. ; Dreschler, J. ; Duren, M. ; Ehrenfried, M. ; Elbakian, G. ; Ellinghaus, F. ; Elschenbroich, U. ; Fabbri, R. ; Fantoni, A. ; Felawka, L. ; Frullani, S. ; Gabbert, D. ; Gapienko, G. ; Gapienko, V. ; Garibaldi, F. ; Gharibyan, V. ; Giordano, F. ; Gliske, S. ; Hadjidakis, C. ; Hartig, M. ; Hasch, D. ; Hill, G. ; Hillenbrand, A. ; Hoek, M. ; Holler, Y. ; Hristova, I. ; Imazu, Y. ; Ivanilov, A. ; Jackson, H.E. ; Jo, H.S. ; Joosten, S. ; Kaiser, R. ; Keri, T. ; Kinney, E. ; Kisselev, A. ; Korotkov, V. ; Kozlov, V. ; Kravchenko, P. ; Lagamba, L. ; Lamb, R. ; Lapikas, L. ; Lehmann, I. ; Lenisa, P. ; Linden-Levy, L.A. ; Lopez Ruiz, A. ; Lorenzon, W. ; Lu, X.-G. ; Lu, X.-R. ; Ma, B.-Q. ; Mahon, D. ; Makins, N.C.R. ; Manaenkov, S.I. ; Manfre, L. ; Mao, Y. ; Marianski, B. ; Martinez de la Ossa, A. ; Marukyan, H. ; Miller, C.A. ; Miyachi, Y. ; Movsisyan, A. ; Murray, M. ; Mussgiller, A. ; Nappi, E. ; Naryshkin, Y. ; Nass, A. ; Negodaev, M. ; Nowak, W.-D. ; Pappalardo, L.L. ; Perez-Benito, R. ; Reimer, P.E. ; Reolon, A.R. ; Riedl, C. ; Rith, K. ; Rosner, G. ; Rostomyan, A. ; Rubin, J. ; Ryckbosch, D. ; Salomatin, Y. ; Sanftl, F. ; Schafer, A. ; Schnell, G. ; Schuler, K.P. ; Seitz, B. ; Shibata, T.-A. ; Shutov, V. ; Stancari, M. ; Statera, M. ; Steijger, J.J.M. ; Stenzel, H. ; Stewart, J. ; Stinzing, F. ; Taroian, S. ; Terkulov, A. ; Trzcinski, A. ; Tytgat, M. ; Vandenbroucke, A. ; van der Nat, P.B. ; Van Haarlem, Y. ; Van Hulse, C. ; Varanda, M. ; Veretennikov, D. ; Vikhrov, V. ; Vilardi, I. ; Vogel, C. ; Wang, S. ; Yaschenko, S. ; Ye, H. ; Ye, Z. ; Yen, S. ; Yu, W. ; Zeiler, D. ; Zihlmann, B. ; Zupranski, P.

Published in: Phys.Rev.Lett.
Year: 2009
Vol.: 103
Page No: 152002
Pages: 6

Abstract: Azimuthal single-spin asymmetries of lepto-produced pions and charged kaons were measured on a transversely polarized hydrogen target. Evidence for a naive-T-odd, transverse-momentum-dependent parton distribution function is deduced from non-vanishing Sivers effects for pi+, pi0, and K+, K-, as well as in the difference of the pi+ and pi- cross sections.

Web-Page: http://inspirebeta.net/record/823754/files/Figure1.png; http://inspirebeta.net/record/823754/files/Figure2a.png; http://inspirebeta.net/record/823754/files/Figure2b.png; http://inspirebeta.net/record/823754/files/Figure3a.png; http://inspirebeta.net/record/823754/files/Figure3b.png; http://inspirebeta.net/record/823754/files/Figure4.png

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