Measurement of the beam asymmetry $Σ$ for $π^0$ and $η$ photoproduction on the proton at $E_γ= 9$ GeV
Creators: name: GlueX Collaboration
name: Ghoul, H. Al
name: Anassontzis, E. G.
name: Austregesilo, A.
name: Barbosa, F.
name: Barnes, A.
name: Beattie, T. D.
name: Bennett, D. W.
name: Berdnikov, V. V.
name: Black, T.
name: Boeglin, W.
name: Briscoe, W. J.
name: Brooks, W. K.
name: Cannon, B. E.
name: Chernyshov, O.
name: Chudakov, E.
name: Crede, V.
name: Dalton, M. M.
name: Deur, A.
name: Dobbs, S.
name: Dolgolenko, A.
name: Dugger, M.
name: Dzhygadlo, R.
name: Egiyan, H.
name: Eugenio, P.
name: Fanelli, C.
name: Foda, A. M.
name: Frye, J.
name: Furletov, S.
name: Gan, L.
name: Gasparian, A.
name: Gerasimov, A.
name: Gevorgyan, N.
name: Goetzen, K.
name: Goryachev, V. S.
name: Guo, L.
name: Hakobyan, H.
name: Hardin, J.
name: Henderson, A.
name: Huber, G. M.
name: Ireland, D. G.
name: Ito, M. M.
name: Jarvis, N. S.
name: Jones, R. T.
name: Kakoyan, V.
name: Kamel, M.
name: Klein, F. J.
name: Kliemt, R.
name: Kourkoumeli, C.
name: Kuleshov, S.
name: Kuznetsov, I.
name: Lara, M.
name: Larin, I.
name: Lawrence, D.
name: Levine, W. I.
name: Livingston, K.
name: Lolos, G. J.
name: Lyubovitskij, V.
name: Mack, D.
name: Mattione, P. T.
name: Matveev, V.
name: McCaughan, M.
name: McCracken, M.
name: McGinley, W.
name: McIntyre, J.
name: Mendez, R.
name: Meyer, C. A.
name: Miskimen, R.
name: Mitchell, R. E.
name: Mokaya, F.
name: Moriya, K.
name: Nerling, F.
name: Nigmatkulov, G.
name: Ochoa, N.
name: Ostrovidov, A. I.
name: Papandreou, Z.
name: Patsyuk, M.
name: Pedroni, R.
name: Pennington, M. R.
name: Pentchev, L.
name: Peters, K. J.
name: Pooser, E.
name: Pratt, B.
name: Qiang, Y.
name: Reinhold, J.
name: Ritchie, B. G.
name: Robison, L.
name: Romanov, D.
name: Salgado, C.
name: Schumacher, R. A.
name: Schwarz, C.
name: Schwiening, J.
name: Semenov, A. Yu.
name: Semenova, I. A.
name: Seth, K. K.
name: Shepherd, M. R.
name: Smith, E. S.
name: Sober, D. I.
name: Somov, A.
name: Somov, S.
name: Soto, O.
name: Sparks, N.
name: Staib, M. J.
name: Stevens, J. R.
name: Strakovsky, I. I.
name: Subedi, A.
name: Tarasov, V.
name: Taylor, S.
name: Teymurazyan, A.
name: Tolstukhin, I.
name: Tomaradze, A.
name: Toro, A.
name: Tsaris, A.
name: Vasileiadis, G.
name: Vega, I.
name: Walford, N. K.
name: Werthmuller, D.
name: Whitlatch, T.
name: Williams, M.
name: Wolin, E.
name: Xiao, T.
name: Zarling, J.
name: Zhang, Z.
name: Zihlmann, B.
name: Mathieu, V.
name: Nys, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report measurements of the photon beam asymmetry $Σ$ for the reactions $\vecγp\to pπ^0$ and $\vecγp\to pη$ from the GlueX experiment using a 9 GeV linearly-polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous $π^0$ measurements and are the first $η$ measurements in this energy regime. The results are compared with theoretical predictions based on $t$-channel, quasi-particle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.
description: 6 pages, 6 figures, Published in Physical Review C: Rapid Communication