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

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, Ye
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.
Zonta, I.
Publication Year :
2013
Publisher :
American Physical Society, 2013.

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.

Subjects

Subjects :
Nuclear Experiment

Details

Language :
English
ISSN :
05562813
Database :
OpenAIRE
Accession number :
edsair.dedup.wf.001..af38e43c74cd5b7986399dc1f55d210b

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