Beam asymmetry Σ for the photoproduction of η and η′ mesons at Eγ = 8.8GeV
- Adhikari, S.
- Ali, A.
- Amaryan, M.
- Austregesilo, A.
- Barbosa, F.
- Barlow, J.
- Barnes, A.
- Barriga, E.
- Barsotti, R.
- Beattie, T. D.
- Berdnikov, V. V.
- Black, T.
- Boeglin, W.
- Boer, M.
- Briscoe, W. J.
- Britton, T.
- Brooks, W. K.
- Cannon, B. E.
- Cao, N.
- Chudakov, E.
- Cole, S.
- Cortes, O.
- Crede, V.
- Dalton, M. M.
- Daniels, T.
- Deur, A.
- Dobbs, S.
- Dolgolenko, A.
- Dotel, R.
- Dugger, M.
- Dzhygadlo, R.
- Egiyan, H.
- Erbora, T.
- Ernst, A.
- Eugenio, P.
- Fanelli, C.
- Fegan, S.
- Foda, A. M.
- Foote, J.
- Frye, J.
- Furletov, S.
- Gan, L.
- Gasparian, A.
- Gevorgyan, N.
- Gleason, C.
- Goetzen, K.
- Goncalves, A.
- Goryachev, V. S.
- Guo, L.
- Hakobyan, H.
- Hamdi, A.
- Huber, G. M.
- Hurley, A.
- Ireland, D. G.
- Ito, M. M.
- Jarvis, N. S.
- Jones, R. T.
- Kakoyan, V.
- Kalicy, G.
- Kamel, M.
- Kourkoumelis, C.
- Kuleshov, S.
- Larin, I.
- Lawrence, D.
- Lersch, D. I.
- Li, H.
- Li, W.
- Liu, B.
- Livingston, K.
- Lolos, G. J.
- Lyubovitskij, V.
- Mack, D.
- Marukyan, H.
- Mattione, P.
- Matveev, V.
- McCaughan, M.
- McCracken, M.
- McGinley, W.
- Meyer, C. A.
- Miskimen, R.
- Mitchell, R. E.
- Nerling, F.
- Ng, L.
- Ostrovidov, A. I.
- Papandreou, Z.
- Patsyuk, M.
- Paudel, C.
- Pauli, P.
- Pedroni, R.
- Pentchev, L.
- Peters, K. J.
- Phelps, W.
- Pooser, E.
- Qin, N.
- Reinhold, J.
- Ritchie, B. G.
- Robison, L.
- Romanov, D.
- Romero, C.
- Salgado, C.
- Schertz, A. M.
- Schumacher, R. A.
- Schwiening, J.
- Semenov, A. Yu.
- Semenova, I. A.
- Seth, K. K.
- Shen, X.
- Shepherd, M. R.
- Smith, E. S.
- Sober, D. I.
- Somov, A.
- Somov, S.
- Soto, O.
- Staib, M.
- Stevens, J. R.
- Strakovsky, I. I.
- Suresh, K.
- Tarasov, V. V.
- Teymurazyan, A.
- Thiel, A.
- Vasileiadis, G.
- Whitlatch, T.
- Wickramaarachchi, N.
- Williams, M.
- Xiao, T.
- Yang, Y.
- Zarling, J.
- Zhang, Z.
- Zhao, G.
- Zhou, Q.
- Zhou, X.
- Zihlmann, B.
DOIAbstract
We report on the measurement of the beam asymmetry Σ for the reactions → γ p → p η and → γ p → p η ′ from the GlueX experiment using an 8.2–8.8-GeV linearly polarized tagged photon beam incident on a liquid hydrogen target in Hall D at Jefferson Laboratory. These measurements are made as a function of momentum transfer − t with significantly higher statistical precision than our earlier η measurements and are the first measurements of η ′ in this energy range. We compare the results to theoretical predictions based on t -channel quasiparticle exchange. We also compare the ratio of Σ η to Σ η ′ to these models as this ratio is predicted to be sensitive to the amount of s ¯ s exchange in...
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