Precise measurements of beam spin asymmetries in semi-inclusive π0 production

Aghasyan, M. et al. (2011) Precise measurements of beam spin asymmetries in semi-inclusive π0 production. Physics Letters B, 704(5), pp. 397-402. (doi:10.1016/j.physletb.2011.09.044)

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Abstract

We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial sin(φh) amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle φh of the produced neutral pion. The dependence of this amplitude on Bjorken x and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McKinnon, Dr Bryan and Livingston, Dr Kenneth and Fegan, Mr Stuart and Protopopescu, Dr Dan and Smith, Mr Gary and Ireland, Professor David and MacGregor, Professor I and Rosner, Professor Guenther
Authors: Aghasyan, M., Avakian, H., Rossi, P., De Sanctis, E., Hasch, D., Mirazita, M., Adikaram, D., Amaryan, M.J., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R.P., Biselli, A.S., Branford, D., Briscoe, W.J., Bueltmann, S., Burkert, V.D., Carman, D.S., Chandavar, S., Cole, P.L., Collins, P., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., Deur, A., Dey, B., Dickson, R., Djalali, C., Dodge, G.E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Fradi, A., Gabrielyan, M.Y., Garcon, M., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Golovatch, E., Gothe, R.W., Graham, L., Griffioen, K.A., Guegan, B., Guidal, M., Guler, N., Guo, L., Hafidi, K., Hanretty, C., Hicks, K., Holtrop, M., Hyde, C.E., Ilieva, Y., Ireland, D.G., Isupov, E.L., Jawalkar, S.S., Jenkins, D., Jo, H.S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F.J., Kubarovsky, V., Kuhn, S.E., Kuleshov, S.V., Kuznetsov, V., Kvaltine, N.D., Livingston, K., Lu, H.Y., MacGregor, I.J.D., Markov, N., Mayer, M., McAndrew, J., McKinnon, B., Meyer, C.A., Micherdzinska, A.M., Mokeev, V., Moreno, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J.W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B.A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Sabatie, F., Saini, M.S., Salgado, C., Schott, D., Schumacher, R.A., Seder, E., Seraydaryan, H., Sharabian, Y.G., Smith, G.D., Sober, D.I., Stepanyan, S.S., Stepanyan, S., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Tang, W., Taylor, C.E., Tkachenko, S., Ungaro, M., Voskanyan, H., Voutier, E., Watts, D., Weinstein, L.B., Weygand, D.P., Wood, M.H., Zana, L., Zhang, J., Zhao, B., and Zhao, Z.W.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:CLAS
Journal Name:Physics Letters B
Journal Abbr.:Phys. Lett. B
Publisher:Elsevier BV
ISSN:0370-2693
ISSN (Online):1873-2445
Copyright Holders:Copyright © 2011 Elsevier B.V.
First Published:First published in Physics Letters B 704(5):397-402
Publisher Policy:Reproduced under a Creative Commons License

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