Near Threshold Neutral Pion Electroproduction at High Momentum Transfers and Generalized Form Factors
Creators: name: Khetarpal, P.
name: Stoler, P.
name: Aznauryan, I. G.
name: Kubarovsky, V.
name: Adhikari, K. P.
name: Adikaram, D.
name: Aghasyan, M.
name: Amaryan, M. J.
name: Anderson, M. D.
name: Pereira, S. Anefalos
name: Anghinolfi, M.
name: Avakian, H.
name: Baghdasaryan, H.
name: Ball, J.
name: Baltzell, N. A.
name: Battaglieri, M.
name: Batourine, V.
name: Bedlinskiy, I.
name: Biselli, A. S.
name: Bono, J.
name: Boiarinov, S.
name: Briscoe, W. J.
name: Brooks, W. K.
name: Burkert, V. D.
name: Carman, D. S.
name: Celentano, A.
name: Charles, G.
name: Cole, P. L.
name: Contalbrigo, M.
name: Crede, V.
name: D'Angelo, A.
name: Dashyan, N.
name: De Vita, R.
name: De Sanctis, E.
name: Deur, A.
name: Djalali, C.
name: Doughty, D.
name: Dugger, M.
name: Dupre, R.
name: Egiyan, H.
name: Alaoui, A. El
name: Fassi, L. El
name: Eugenio, P.
name: Fedotov, G.
name: Fegan, S.
name: Fersch, R.
name: Fleming, J. A.
name: Fradi, A.
name: Gabrielyan, M. Y.
name: Garçon, M.
name: Gevorgyan, N.
name: Gilfoyle, G. P.
name: Giovanetti, K. L.
name: Girod, F. X.
name: Goetz, J. T.
name: Gohn, W.
name: Golovatch, E.
name: Gothe, R. W.
name: Griffioen, K. A.
name: Guegan, B.
name: Guidal, M.
name: Guo, L.
name: Hafidi, K.
name: Hakobyan, H.
name: Hanretty, C.
name: Harrison, N.
name: Hicks, K.
name: Ho, D.
name: Holtrop, M.
name: Hyde, C. E.
name: Ilieva, Y.
name: Ireland, D. G.
name: Ishkhanov, B. S.
name: Isupov, E. L.
name: Jo, H. S.
name: Joo, K.
name: Keller, D.
name: Khandaker, M.
name: Kim, A.
name: Kim, W.
name: Klein, F. J.
name: Koirala, S.
name: Kubarovsky, A.
name: Kuleshov, S. V.
name: Kvaltine, N. D.
name: Lewis, S.
name: Livingston, K.
name: Lu, H. Y.
name: MacGregor, I. J. D.
name: Mao, Y.
name: Martinez, D.
name: Mayer, M.
name: McKinnon, B.
name: Meyer, C. A.
name: Mineeva, T.
name: Mirazita, M.
name: Mokeev, V.
name: Montgomery, R. A.
name: Moutarde, H.
name: Munevar, E.
name: Camacho, C. Munoz
name: Nadel-Turonski, P.
name: Nasseripour, R.
name: Niccolai, S.
name: Niculescu, G.
name: Niculescu, I.
name: Osipenko, M.
name: Ostrovidov, A. I.
name: Pappalardo, L. L.
name: Paremuzyan, R.
name: Park, K.
name: Park, S.
name: Pasyuk, E.
name: Phelps, E.
name: Phillips, J. J.
name: Pisano, S.
name: Pogorelko, O.
name: Pozdniakov, S.
name: Price, J. W.
name: Procureur, S.
name: Protopopescu, D.
name: Puckett, A. J. R.
name: Raue, B. A.
name: Ricco, G.
name: Rimal, D.
name: Ripani, M.
name: Rosner, G.
name: Rossi, P.
name: Sabatié, F.
name: Saini, M. S.
name: Salgado, C.
name: Saylor, N. A.
name: Schott, D.
name: Schumacher, R. A.
name: Seder, E.
name: Seraydaryan, H.
name: Sharabian, Y. G.
name: Smith, G. D.
name: Sober, D. I.
name: Sokhan, D.
name: Stepanyan, S. S.
name: Stepanyan, S.
name: Strakovsky, I. I.
name: Strauch, S.
name: Taiuti, M.
name: Tang, W.
name: Taylor, C. E.
name: Tkachenko, S.
name: Ungaro, M.
name: Vernarsky, B.
name: Voskanyan, H.
name: Voutier, E.
name: Walford, N. K.
name: Weinstein, L. B.
name: Weygand, D. P.
name: Wood, M. H.
name: Zachariou, N.
name: Zhang, J.
name: Zhao, Z. W.
name: Zonta, I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the measurement of near threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range $Q^2$ from 2 to 4.5 GeV$^2$ and $W$ from 1.08 to 1.16 GeV. These measurements allow us to access the dominant pion-nucleon s-wave multipoles $E_{0+}$ and $S_{0+}$ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors $G_1^{π^0 p}(Q^2)$ and $G_2^{π^0 p}(Q^2)$. The data are compared to these generalized form factors and the results for $G_1^{π^0 p}(Q^2)$ are found to be in good agreement with the LCSR predictions, but the level of agreement with $G_2^{π^0 p}(Q^2)$ is poor.
description: 17 pages, 18 figures, Journal article (Physical Review C)