Measurement of the generalized form factors near threshold via $\gamma^* p \to n\pi^+$ at high $Q^2$
- Park, K.
- Gothe, R.W.
- Adhikari, K.P.
- Adikaram, D.
- Anghinolfi, M.
- Baghdasaryan, H.
- Ball, J.
- Battaglieri, M.
- Batourine, V.
- Bedlinskiy, I.
- P. Bennett, R.
- Biselli, A.S.
- Bookwalter, C.
- Boiarinov, S.
- Branford, D.
- Briscoe, W.J.
- Brooks, W.K.
- Burkert, V.D.
- Carman, D.S.
- Celentano, A.
- Chandavar, S.
- Charles, G.
- Cole, P.L.
- Contalbrigo, M.
- Crede, V.
- D'Angelo, A.
- Daniel, A.
- Dashyan, N.
- De Vita, R.
- De Sanctis, E.
- Deur, A.
- Djalali, C.
- Doughty, D.
- Dupre, R.
- El Alaoui, A.
- El Fassi, L.
- Eugenio, P.
- Fedotov, G.
- Fradi, A.
- Gabrielyan, M.Y.
- Gevorgyan, N.
- Gilfoyle, G.P.
- Giovanetti, K.L.
- Girod, F.X.
- Goetz, J.T.
- Gohn, W.
- Golovatch, E.
- Graham, L.
- Griffioen, K.A.
- Guidal, M.
- Guo, L.
- Hafidi, K.
- Hakobyan, H.
- Hanretty, C.
- Heddle, D.
- Hicks, K.
- Holtrop, M.
- Hyde, C. E.
- Ilieva, Y.
- Ireland, D.G.
- Ishkhanov, B.S.
- Isupov, E.L.
- Jenkins, D.
- Jo, H.S.
- Joo, K.
- Kalantarians, N.
- Khandaker, M.
- Khetarpal, P.
- Kim, A.
- Kim, W.
- Klein, A.
- Klein, F.J.
- Kubarovsky, A.
- Kubarovsky, V.
- Kuhn, S.E.
- Kuleshov, S.V.
- Kvaltine, N.D.
- Livingston, K.
- Lu, H.Y.
- Macgregor, I..J .D.
- Markov, N.
- Mayer, M.
- Mckinnon, B.
- Mestayer, M.D.
- Meyer, C.A.
- Mineeva, T.
- Mirazita, M.
- Mokeev, V.
- Moutarde, H.
- Munevar, E.
- Nadel-Turonski, P.
- Nasseripour, R.
- Niccolai, S.
- Niculescu, G.
- Niculescu, I.
- Osipenko, M.
- Ostrovidov, A.I.
- Paolone, M.
- Pappalardo, L.
- Paremuzyan, R.
- Park, S.
- Anefalos Pereira, S.
- Phelps, E.
- Pisano, S.
- Pogorelko, O.
- Pozdniakov, S.
- Price, J.W.
- Procureur, S.
- Prok, Y.
- Ricco, G.
- Rimal, D.
- Ripani, M.
- Ritchie, B.G.
- Rosner, G.
- Rossi, P.
- Sabatié, F.
- Saini, M.S.
- Salgado, C.
- Schott, D.
- Schumacher, R.A.
- Seraydaryan, H.
- Sharabian, Y.G.
- Smith, E.S.
- Smith, G.D.
- Sober, D.I.
- Sokhan, D.
- Stepanyan, S.S.
- Stepanyan, S.
- Stoler, P.
- Strakovsky, I.I.
- Strauch, S.
- Taiuti, M.
- Tang, W.
- Taylor, C.E.
- Tian, Y.
- Tkachenko, S.
- Trivedi, A.
- Ungaro, M.
- Vernarsky, B.
- Vlassov, A.V.
- Voutier, E.
- Watts, D.P.
- Weygand, D.P.
- Wood, M.H.
- Zachariou, N.
- Zhao, B.
- Zhao, Z.W.
DOIAbstract
17pages, 22 figures, Journal article (Physical Review C)We report the first extraction of the pion-nucleon multipoles near the production threshold for the $n\pi^+$ channel at relatively high momentum transfer ($Q^2$ up to 4.2 $\rm{GeV^2}$). The dominance of the s-wave transverse multipole ($E_{0+}$), expected in this region, allowed us to access the generalized form factor $G_1$ within the light-cone sum rule (LCSR) framework as well as the axial form factor $G_A$. The data analyzed in this work were collected by the nearly $4\pi$ CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754 $\rm{GeV}$ electron beam on a proton target. The differential cross section and the $\pi-N$-multipole $E_{0+}/G_D$ were measured using two different method...
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