Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2

K. Park, R. W. Gothe, K. P. Adhikari, D. Adikaram, M. Anghinolfi, H. Baghdasaryan, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, R. P. Bennett, A. S. Biselli, C. Bookwalter, S. Boiarinov, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. Carman, A. CelentanoS. Chandavar, G. Charles, P. L. Cole, M. Contalbrigo, V. Crede, A. D'Angelo, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, D. Doughty, R. Dupre, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, A. Fradi, M. Y. Gabrielyan, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, E. Golovatch, L. Graham, K. A. Griffioen, M. Guidal, L. Guo, K. Hafidi, H. Hakobyan, C. Hanretty, D. Heddle, K. Hicks, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, D. Jenkins, H. S. Jo, K. Joo, N. Kalantarians, M. Khandaker, P. Khetarpal, A. Kim, W. Kim, A. Klein, F. J. Klein, A. Kubarovsky, V. Kubarovsky, S. E. Kuhn, S. V. Kuleshov, N. D. Kvaltine, K. Livingston, H. Y. Lu, I. J D MacGregor, N. Markov, M. Mayer, B. McKinnon, M. D. Mestayer, C. A. Meyer, T. Mineeva, M. Mirazita, V. Mokeev, H. Moutarde, E. Munevar, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, M. Paolone, L. Pappalardo, R. Paremuzyan, S. Park, S. Anefalos Pereira, E. Phelps, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, G. Ricco, D. Rimal, M. Ripani, Barry Ritchie, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, C. Salgado, D. Schott, R. A. Schumacher, H. Seraydaryan, Y. G. Sharabian, E. S. Smith, G. D. Smith, D. I. Sober, D. Sokhan, S. S. Stepanyan, S. Stepanyan, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, W. Tang, C. E. Taylor, Y. Tian, S. Tkachenko, A. Trivedi, M. Ungaro, B. Vernarsky, A. V. Vlassov, E. Voutier, D. P. Watts, D. P. Weygand, M. H. Wood, N. Zachariou, B. Zhao, Z. W. Zhao

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report the first extraction of the pion-nucleon multipoles near the production threshold for the nπ + channel at relatively high momentum transfer (Q2 up to 4.2 GeV2). 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 4π CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the π-N multipole E 0+/G D were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q2 independent.

Original languageEnglish (US)
Article number035208
JournalPhysical Review C - Nuclear Physics
Volume85
Issue number3
DOIs
StatePublished - Mar 26 2012

Fingerprint

multipoles
form factors
thresholds
sum rules
cones
transverse waves
acceptability
momentum transfer
pions
electron beams
spectrometers
protons
cross sections

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Park, K., Gothe, R. W., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., ... Zhao, Z. W. (2012). Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2. Physical Review C - Nuclear Physics, 85(3), [035208]. https://doi.org/10.1103/PhysRevC.85.035208

Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2. / Park, K.; Gothe, R. W.; Adhikari, K. P.; Adikaram, D.; Anghinolfi, M.; Baghdasaryan, H.; Ball, J.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Bennett, R. P.; 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.; Pereira, S. Anefalos; Phelps, E.; Pisano, S.; Pogorelko, O.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Prok, Y.; Ricco, G.; Rimal, D.; Ripani, M.; Ritchie, Barry; 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.

In: Physical Review C - Nuclear Physics, Vol. 85, No. 3, 035208, 26.03.2012.

Research output: Contribution to journalArticle

Park, K, Gothe, RW, Adhikari, KP, Adikaram, D, Anghinolfi, M, Baghdasaryan, H, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bennett, RP, Biselli, AS, Bookwalter, C, Boiarinov, S, Branford, D, Briscoe, WJ, Brooks, WK, Burkert, VD, Carman, DS, Celentano, A, Chandavar, S, Charles, G, Cole, PL, 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, MY, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gohn, W, Golovatch, E, Graham, L, Griffioen, KA, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Heddle, D, Hicks, K, Holtrop, M, Hyde, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Jenkins, D, Jo, HS, Joo, K, Kalantarians, N, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, A, Klein, FJ, Kubarovsky, A, Kubarovsky, V, Kuhn, SE, Kuleshov, SV, Kvaltine, ND, Livingston, K, Lu, HY, MacGregor, IJD, Markov, N, Mayer, M, McKinnon, B, Mestayer, MD, Meyer, CA, Mineeva, T, Mirazita, M, Mokeev, V, Moutarde, H, Munevar, E, Nadel-Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, AI, Paolone, M, Pappalardo, L, Paremuzyan, R, Park, S, Pereira, SA, Phelps, E, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Prok, Y, Ricco, G, Rimal, D, Ripani, M, Ritchie, B, Rosner, G, Rossi, P, Sabatié, F, Saini, MS, Salgado, C, Schott, D, Schumacher, RA, Seraydaryan, H, Sharabian, YG, Smith, ES, Smith, GD, Sober, DI, Sokhan, D, Stepanyan, SS, Stepanyan, S, Stoler, P, Strakovsky, II, Strauch, S, Taiuti, M, Tang, W, Taylor, CE, Tian, Y, Tkachenko, S, Trivedi, A, Ungaro, M, Vernarsky, B, Vlassov, AV, Voutier, E, Watts, DP, Weygand, DP, Wood, MH, Zachariou, N, Zhao, B & Zhao, ZW 2012, 'Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2', Physical Review C - Nuclear Physics, vol. 85, no. 3, 035208. https://doi.org/10.1103/PhysRevC.85.035208
Park K, Gothe RW, Adhikari KP, Adikaram D, Anghinolfi M, Baghdasaryan H et al. Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2. Physical Review C - Nuclear Physics. 2012 Mar 26;85(3). 035208. https://doi.org/10.1103/PhysRevC.85.035208
Park, K. ; Gothe, R. W. ; Adhikari, K. P. ; Adikaram, D. ; Anghinolfi, M. ; Baghdasaryan, H. ; Ball, J. ; Battaglieri, M. ; Batourine, V. ; Bedlinskiy, I. ; Bennett, R. P. ; 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. ; Pereira, S. Anefalos ; Phelps, E. ; Pisano, S. ; Pogorelko, O. ; Pozdniakov, S. ; Price, J. W. ; Procureur, S. ; Prok, Y. ; Ricco, G. ; Rimal, D. ; Ripani, M. ; Ritchie, Barry ; 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. / Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2. In: Physical Review C - Nuclear Physics. 2012 ; Vol. 85, No. 3.
@article{12c9082ae5124dd597003cc07c77cb6f,
title = "Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2",
abstract = "We report the first extraction of the pion-nucleon multipoles near the production threshold for the nπ + channel at relatively high momentum transfer (Q2 up to 4.2 GeV2). 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 4π CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the π-N multipole E 0+/G D were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q2 independent.",
author = "K. Park and Gothe, {R. W.} and Adhikari, {K. P.} and D. Adikaram and M. Anghinolfi and H. Baghdasaryan and J. Ball and M. Battaglieri and V. Batourine and I. Bedlinskiy and Bennett, {R. P.} and Biselli, {A. S.} and C. Bookwalter and S. Boiarinov and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and Carman, {D. S.} and A. Celentano and S. Chandavar and G. Charles and Cole, {P. L.} and M. Contalbrigo and V. Crede and A. D'Angelo and A. Daniel and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and A. Deur and C. Djalali and D. Doughty and R. Dupre and {El Alaoui}, A. and {El Fassi}, L. and P. Eugenio and G. Fedotov and A. Fradi and Gabrielyan, {M. Y.} and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Goetz, {J. T.} and W. Gohn and E. Golovatch and L. Graham and Griffioen, {K. A.} and M. Guidal and L. Guo and K. Hafidi and H. Hakobyan and C. Hanretty and D. Heddle and K. Hicks and M. Holtrop and Hyde, {C. E.} and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and D. Jenkins and Jo, {H. S.} and K. Joo and N. Kalantarians and M. Khandaker and P. Khetarpal and A. Kim and W. Kim and A. Klein and Klein, {F. J.} and A. Kubarovsky and V. Kubarovsky and Kuhn, {S. E.} and Kuleshov, {S. V.} and Kvaltine, {N. D.} and K. Livingston and Lu, {H. Y.} and MacGregor, {I. J D} and N. Markov and M. Mayer and B. McKinnon and Mestayer, {M. D.} and Meyer, {C. A.} and T. Mineeva and M. Mirazita and V. Mokeev and H. Moutarde and E. Munevar and P. Nadel-Turonski and R. Nasseripour and S. Niccolai and G. Niculescu and I. Niculescu and M. Osipenko and Ostrovidov, {A. I.} and M. Paolone and L. Pappalardo and R. Paremuzyan and S. Park and Pereira, {S. Anefalos} and E. Phelps and S. Pisano and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and S. Procureur and Y. Prok and G. Ricco and D. Rimal and M. Ripani and Barry Ritchie and G. Rosner and P. Rossi and F. Sabati{\'e} and Saini, {M. S.} and C. Salgado and D. Schott and Schumacher, {R. A.} and H. Seraydaryan and Sharabian, {Y. G.} and Smith, {E. S.} and Smith, {G. D.} and Sober, {D. I.} and D. Sokhan and Stepanyan, {S. S.} and S. Stepanyan and P. Stoler and Strakovsky, {I. I.} and S. Strauch and M. Taiuti and W. Tang and Taylor, {C. E.} and Y. Tian and S. Tkachenko and A. Trivedi and M. Ungaro and B. Vernarsky and Vlassov, {A. V.} and E. Voutier and Watts, {D. P.} and Weygand, {D. P.} and Wood, {M. H.} and N. Zachariou and B. Zhao and Zhao, {Z. W.}",
year = "2012",
month = "3",
day = "26",
doi = "10.1103/PhysRevC.85.035208",
language = "English (US)",
volume = "85",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "3",

}

TY - JOUR

T1 - Measurement of the generalized form factors near threshold via γ *p→nπ + at high Q2

AU - Park, K.

AU - Gothe, R. W.

AU - Adhikari, K. P.

AU - Adikaram, D.

AU - Anghinolfi, M.

AU - Baghdasaryan, H.

AU - Ball, J.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Bennett, R. P.

AU - Biselli, A. S.

AU - Bookwalter, C.

AU - Boiarinov, S.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Daniel, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Djalali, C.

AU - Doughty, D.

AU - Dupre, R.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fradi, A.

AU - Gabrielyan, M. Y.

AU - Gevorgyan, N.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gohn, W.

AU - Golovatch, E.

AU - Graham, L.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guo, L.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Heddle, D.

AU - Hicks, K.

AU - Holtrop, M.

AU - Hyde, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Joo, K.

AU - Kalantarians, N.

AU - Khandaker, M.

AU - Khetarpal, P.

AU - Kim, A.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Kubarovsky, A.

AU - Kubarovsky, V.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Kvaltine, N. D.

AU - Livingston, K.

AU - Lu, H. Y.

AU - MacGregor, I. J D

AU - Markov, N.

AU - Mayer, M.

AU - McKinnon, B.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mineeva, T.

AU - Mirazita, M.

AU - Mokeev, V.

AU - Moutarde, H.

AU - Munevar, E.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Paolone, M.

AU - Pappalardo, L.

AU - Paremuzyan, R.

AU - Park, S.

AU - Pereira, S. Anefalos

AU - Phelps, E.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Ricco, G.

AU - Rimal, D.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Saini, M. S.

AU - Salgado, C.

AU - Schott, D.

AU - Schumacher, R. A.

AU - Seraydaryan, H.

AU - Sharabian, Y. G.

AU - Smith, E. S.

AU - Smith, G. D.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stepanyan, S. S.

AU - Stepanyan, S.

AU - Stoler, P.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tang, W.

AU - Taylor, C. E.

AU - Tian, Y.

AU - Tkachenko, S.

AU - Trivedi, A.

AU - Ungaro, M.

AU - Vernarsky, B.

AU - Vlassov, A. V.

AU - Voutier, E.

AU - Watts, D. P.

AU - Weygand, D. P.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zhao, B.

AU - Zhao, Z. W.

PY - 2012/3/26

Y1 - 2012/3/26

N2 - We report the first extraction of the pion-nucleon multipoles near the production threshold for the nπ + channel at relatively high momentum transfer (Q2 up to 4.2 GeV2). 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 4π CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the π-N multipole E 0+/G D were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q2 independent.

AB - We report the first extraction of the pion-nucleon multipoles near the production threshold for the nπ + channel at relatively high momentum transfer (Q2 up to 4.2 GeV2). 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 4π CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the π-N multipole E 0+/G D were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q2 independent.

UR - http://www.scopus.com/inward/record.url?scp=84859142715&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859142715&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.85.035208

DO - 10.1103/PhysRevC.85.035208

M3 - Article

AN - SCOPUS:84859142715

VL - 85

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 3

M1 - 035208

ER -