Measurement of beam-spin asymmetries for π+ electroproduction above the baryon resonance region

Avakian, H. et al. (2004) Measurement of beam-spin asymmetries for π+ electroproduction above the baryon resonance region. Physical Review D, 69(11), art 112004. (doi:10.1103/PhysRevD.69.112004)

Full text not currently available from Enlighten.

Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.69.112004

Abstract

We report the first evidence for a nonzero beam-spin azimuthal asymmetry in the electroproduction of positive pions in the deep-inelastic kinematic region. Data for the reaction ep→e'pi(+)X have been obtained using a polarized electron beam of 4.3 GeV with the CEBAF Large Acceptance Spectrometer at the Thomas Jefferson National Accelerator Facility. The amplitude of the sin phi modulation increases with the momentum of the pion relative to the virtual photon, z. In the range z=0.5-0.8 the average amplitude is 0.038+/-0.005+/-0.003 for a missing mass M-X gt 1.1 GeV and 0.037+/-0.007+/-0.004 for M-X gt 1.4 GeV

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Livingston, Dr Kenneth and Melone, Dr Joseph and Kellie, Dr James
Authors: Avakian, H., Burkert, V.D., Elouadrhiri, L., Bianchi, N., Adams, G., Afanasev, A., Ambrozewicz, P., Anciant, E., Anghinolfi, M., Armstrong, D.S., Asavapibhop, B., Audit, G., Auger, T., Bagdasaryan, H., Ball, J.P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bellis, M., Benmouna, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bouchigny, S., Bradford, R., Branford, D., Brooks, W.K., Butuceanu, C., Calarco, J.R., Carman, D.S., Carnahan, B., Cetina, C., Ciciani, L., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., DeSanctis, E., DeVita, R., Degtyarenko, P.V., Denizli, H., Dennis, L., Dharmawardane, K.V., Djalali, C., Dodge, G.E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Dzyubak, O.P., Eckhause, M., Egiyan, H., Egiyan, K.S., Empl, A., Eugenio, P., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Funsten, H., Gaff, S.J., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, P., Gordon, C.I.O., Griffioen, K., Guidal, M., Guillo, M., Guo, L., Gyurjyan, V., Hadjidakis, C., Hakobyan, R.S., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ilieva, Y., Ito, M.M., Jenkins, D., Joo, K., Kelley, J.H., Kellie, J., Khandaker, M., Kim, D.H., Kim, K.Y., Kim, K., Kim, M.S., Kim, W., Klein, A., Klein, F.J., Klimenko, A., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kubarovsky, V., Kuhn, S.E., Lachniet, J., Laget, J.M., Lawrence, D., Livingston, K., Li, J., Longhi, A., Lukashin, K., Manak, J.J., Marchand, C., McAleer, S., Mcnabb, J.W.C., Mecking, B.A., Mehrabyan, S., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Morand, L., Morrow, S.A., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nasseripour, R., Nelson, S.O., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Opper, A.K., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Santoro, J.P., Sapunenko, V., Sargsyan, M., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Shaw, J., Simionatto, S., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D.J., Thoma, U., Thompson, R., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weller, H., Weygand, D.P., Whisnant, C.S., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., and Zhou, Z.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1089-4918

University Staff: Request a correction | Enlighten Editors: Update this record