/ Experiment-HEP hep-ex/0212039


Measurement of single spin azimuthal asymmetries in semiinclusive electroproduction of pions and kaons on a longitudinally polarized deuterium target


Airapetian, A. ; Akopov, N. ; Akopov, Z. ; Amarian, M. ; Ammosov, V.V. ; Andrus, A. ; Aschenauer, E.C. ; Augustyniak, W. ; Avakian, R. ; Avetissian, A. ; Avetissian, E. ; Bailey, P. ; Baturin, V. ; Baumgarten, C. ; Beckmann, M. ; Belostotski, S. ; Bernreuther, S. ; Bianchi, N. ; Blok, H.P. ; Bottcher, H. ; Borissov, A. ; Bouwhuis, M. ; Brack, J. ; Brull, A. ; Bryzgalov, V. ; Capitani, G.P. ; Chiang, H.C. ; Ciullo, G. ; Contalbrigo, M. ; Court, G.R. ; Dalpiaz, P.F. ; De Leo, R. ; De Nardo, L. ; De Sanctis, E. ; Devitsin, E. ; Di Nezza, P. ; Duren, M. ; Ehrenfried, M. ; Elalaoui-Moulay, A. ; Elbakian, G. ; Ellinghaus, F. ; Elschenbroich, U. ; Ely, J. ; Fabbri, R. ; Fantoni, A. ; Fechtchenko, A. ; Felawka, L. ; Fox, B. ; Franz, J. ; Frullani, S. ; Garber, Y. ; Gapienko, G. ; Gapienko, V. ; Garibaldi, F. ; Garutti, E. ; Gaskell, D. ; Gavrilov, G. ; Gharibyan, V. ; Graw, G. ; Grebeniouk, O. ; Greeniaus, L.G. ; Haeberli, W. ; Hafidi, K. ; Hartig, M. ; Hasch, D. ; Heesbeen, D. ; Henoch, M. ; Hertenberger, R. ; Hesselink, W.H.A. ; Hillenbrand, A. ; Holler, Y. ; Hommez, B. ; Iarygin, G. ; Ivanilov, A. ; Izotov, A. ; Jackson, H.E. ; Jgoun, A. ; Kaiser, R. ; Kinney, E. ; Kisselev, A. ; Konigsmann, Kay ; Kolster, H. ; Kopytin, M. ; Korotkov, V. ; Kozlov, V. ; Krauss, B. ; Krivokhijine, V.G. ; Lagamba, L. ; Lapikas, L. ; Laziev, A. ; Lenisa, P. ; Liebing, P. ; Lindemann, T. ; Lipka, K. ; Lorenzon, W. ; Ma, B.Q. ; Makins, N.C.R. ; Marukyan, H. ; Masoli, F. ; Menden, F. ; Mexner, V. ; Meyners, N. ; Mikloukho, O. ; Miller, C.A. ; Miyachi, Y. ; Muccifora, V. ; Nagaitsev, A. ; Nappi, E. ; Naryshkin, Y. ; Nass, A. ; Nowak, W.D. ; Oganessyan, K. ; Ohsuga, H. ; Orlandi, G. ; Potashov, S. ; Potterveld, David H. ; Raithel, M. ; Reggiani, D. ; Reimer, P.E. ; Reischl, A. ; Reolon, A.R. ; Rith, K. ; Rosner, G. ; Rostomyan, A. ; Ryckbosch, D. ; Sanjiev, I. ; Savin, Igor A. ; Scarlett, C. ; Schafer, A. ; Schill, C. ; Schnell, G. ; Schuler, K.P. ; Schwind, A. ; Seidl, R. ; Seibert, J. ; Seitz, B. ; Shanidze, R. ; Shibata, T.A. ; Shutov, V. ; Simani, M.C. ; Sinram, K. ; Stancari, M. ; Statera, M. ; Steffens, E. ; Steijger, J.J.M. ; Stewart, J. ; Stosslein, U. ; Tanaka, H. ; Taroian, S. ; Tchuiko, B. ; Terkulov, A. ; Tessarin, S. ; Thomas, E. ; Tkabladze, A. ; Trzcinski, A. ; Tytgat, M. ; Urciuoli, G.M. ; van der Nat, P. ; van der Steenhoven, G. ; van de Vyver, R. ; Vetterli, M.C. ; Vikhrov, V. ; Vincter, M.G. ; Visser, J. ; Vogel, C. ; Vogt, M. ; Volmer, J. ; Weiskopf, C. ; Wendland, J. ; Wilbert, J. ; Wise, T. ; Yen, S. ; Yoneyama, S. ; Zihlmann, B. ; Zohrabian, H. ; Zupranski, P.

Published in: Phys.Lett.
Year: 2003
Vol.: B562
Page No: 182-192
Pages: 10

Abstract: Single-spin asymmetries have been measured for semi-inclusive electroproduction of $\pi^+$, $\pi^-$, $\pi^0$ and $K^+$ mesons in deep-inelastic scattering off a longitudinally polarised deuterium target. The asymmetries appear in the distribution of the hadrons in the azimuthal angle $\phi$ around the virtual photon direction, relative to the lepton scattering plane. The corresponding analysing powers in the $\sin \phi$ moment of the cross section are $0.012 \pm 0.002 {(stat.)} \pm 0.002 {(syst.)}$ for $\pi^+$, $0.006 \pm 0.003 {(stat.)} \pm 0.002 {(syst.)}$ for $\pi^-$, $0.021 \pm 0.005 {(stat.)} \pm 0.003 {(syst.)}$ for $\pi^0$ and $0.013 \pm 0.006 {(stat.)} \pm 0.003 {(syst.)}$ for $K^+$. The $\sin 2\phi$ moments are compatible with zero for all particles.

Web-Page: http://www.adsabs.harvard.edu/abs/2003PhLB..562..182H; http://alice.cern.ch/format/showfull?sysnb=2356279; http://www.sciencedirect.com/science?_ob=GatewayURL&_origin=SPIRES&_method=citationSearch&_volkey=03702693%23562%23182&_version=1&md5=437ac37adf60f696abd2df939ad8d468; http://www.sciencedirect.com/web-editions?_ob=GatewayURL&_origin=SPIRES&_method=citationSearch&_volkey=03702693%23562%23182&_version=1&md5=437ac37adf60f696abd2df939ad8d468

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