Beam asymmetry Σ for π+ and π0 photoproduction on the proton for photon energies from 1.102 to 1.862 GeV

Dugger, M. et al. (2013) Beam asymmetry Σ for π+ and π0 photoproduction on the proton for photon energies from 1.102 to 1.862 GeV. Physical Review C, 88(6), Art. 065203. (doi:10.1103/PhysRevC.88.065203)

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Abstract

Beam asymmetries for the reactions γp→pπ0 and γp→nπ+ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged, linearly polarized photon beam with energies from 1.102–1.862 GeV. A Fourier moment technique for extracting beam asymmetries from experimental data is described. The results reported here possess greater precision and finer energy resolution than previous measurements. Our data for both pion reactions appear to favor the SAID and Bonn-Gatchina scattering analyses over the older Mainz MAID predictions. After incorporating the present set of beam asymmetries into the world database, exploratory fits made with the SAID analysis indicate that the largest changes from previous fits are for properties of the Δ(1700)3/2− and Δ(1905)5/2+ states.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria and Protopopescu, Dr Dan and Smith, Mr Gordon and MacGregor, Professor I and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Montgomery, Dr Rachel and Ireland, Professor David and Lewis, Dr Stefanie and Rosner, Professor Guenther
Authors: Dugger, M., Ritchie, B.G., Collins, P., Pasyuk, E., Briscoe, W.J., Strakovsky, I. I., Workman, R.L., Azimov, Y., Adhikari, K.P., Adikaram, D., Aghasyan, M., Amaryan, M.J., Anderson, M.D., Pereira, S., Avakian, H., Ball, J., Baltzell, N.A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Boiarinov, S., Burkert, V.D., Carman, D.S., Celentano, A., Chandavar, S., Cole, P.L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Fleming, J.A., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Hicks, K., Ho, D., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jo, H.S., Joo, K., Keller, D., Khandaker, M., Kim, W., Klein, A., Klein, F.J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S.V., Lewis, S., Livingston, K., Lu, H.Y., MacGregor, I.J.D., Martinez, D., Mayer, M., McKinnon, B., Mineeva, T., Mirazita, M., Mokeev, V., Montgomery, R.A., Moutarde, H., Munevar, E., Camacho, C., Nadel-Turonski, P., Nepali, C.S., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Pappalardo, L.L., Paremuzyan, R., Park, K., Park, S., Phelps, E., Phillips, J.J., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J.W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B.A., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Sabatié, F., Saini, M.S., Salgado, C., Schott, D., Schumacher, R.A., Seder, E., Seraydaryan, H., Sharabian, Y.G., Smith, G.D., Sober, D.I., Sokhan, D., Stepanyan, S.S., Stoler, P., Strauch, S., Taiuti, M., Tang, W., Tian, Y., Tkachenko, S., Torayev, B., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Weygand, D.P., Zachariou, N., Zana, L., Zhang, J., Zhao, Z.W., and Zonta, I.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review C
Publisher:American Physical Society
ISSN:0556-2813
ISSN (Online):1089-490X
Copyright Holders:Copyright © 2013 American Physical Society
First Published:First published in Physical Review C 88(6): 065203
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
570711Nuclear Physics GroupDavid IrelandScience & Technologies Facilities Council (STFC)ST/J000175/1P&A - PHYSICS & ASTRONOMY