Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al.

K. Park; I. G. Aznauryan; V. D. Burkert; K. P. Adhikari; M. J. Amaryan; S. Anefalos Pereira; H. Avakian; M. Battaglieri; R. Badui; I. Bedlinskiy; A. S. Biselli; J. Bono; W. J. Briscoe; W. K. Brooks; D. S. Carman; A. Celentano; S. Chandavar; G. Charles; L. Colaneri; P. L. Cole; M. Contalbrigo; O. Cortes; V. Crede; A. D'Angelo; N. Dashyan; R. De Vita; E. De Sanctis; A. Deur; C. Djalali; D. Doughty; R. Dupre; H. Egiyan; A. El Alaoui; L. Elouadrhiri; L. El Fassi; P. Eugenio; G. Fedotov; S. Fegan; R. Fersch; A. Filippi; J. A. Fleming; B. Garillon; M. Garçon; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; H. S. Joo; J. T. Goetz; E. Golovatch; R. W. Gothe; K. A. Griffioen; B. Guegan; M. Guidal; L. Guo; H. Hakobyan; C. Hanretty; M. Hattawy; K. Hicks; M. Holtrop; S. M. Hughes; C. E. Hyde; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; D. Jenkins; H. Jiang; H. S. Jo; K. Joo; S. Joosten; D. Keller; M. Khandaker; A. Kim; W. Kim; A. Klein; F. J. Klein; V. Kubarovsky; S. E. Kuhn; S. V. Kuleshov; P. Lenisa; K. Livingston; H. Y. Lu; I. J.D. Macgregor; N. Markov; D. Martinez; B. McKinnon; V. Mokeev; R. A. Montgomery; H. Moutarde; C. Munoz Camacho; P. Nadel-Turonski; S. Niccolai; G. Niculescu; I. Niculescu; M. Osipenko; A. I. Ostrovidov; M. Paolone; E. Pasyuk; P. Peng; W. Phelps; J. J. Phillips; S. Pisano; O. Pogorelko; J. W. Price; S. Procureur; Y. Prok; D. Protopopescu; A. J.R. Puckett; B. A. Raue; M. Ripani; A. Rizzo; G. Rosner; P. Rossi; P. Roy; F. Sabatié; C. Salgado; D. Schott; R. A. Schumacher; E. Seder; Y. G. Sharabian; A. Simonyan; Iu Skorodumina; E. S. Smith; G. D. Smith; N. Sparveris; P. Stoler; I. I. Strakovsky; S. Strauch; V. Sytnik; M. Taiuti; W. Tang; C. E. Taylor; Ye Tian; A. Trivedi; M. Ungaro; H. Voskanyan; E. Voutier; N. K. Walford; D. P. Watts; X. Wei; L. B. Weinstein; M. H. Wood; N. Zachariou; L. Zana; J. Zhang; Z. W. Zhao; I. Zonta

doi:10.1103/PhysRevC.91.045203

Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al.

K. Park, I. G. Aznauryan, V. D. Burkert, K. P. Adhikari, M. J. Amaryan, S. Anefalos Pereira, H. Avakian, M. Battaglieri, R. Badui, I. Bedlinskiy, A. S. Biselli, J. Bono, W. J. Briscoe, W. K. Brooks, D. S. Carman, A. Celentano, S. Chandavar, G. Charles, L. Colaneri, P. L. ColeM. Contalbrigo, O. Cortes, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, D. Doughty, R. Dupre, H. Egiyan, A. El Alaoui, L. Elouadrhiri, L. El Fassi, P. Eugenio, G. Fedotov, S. Fegan, R. Fersch, A. Filippi, J. A. Fleming, B. Garillon, M. Garçon, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, H. S. Joo, J. T. Goetz, E. Golovatch, R. W. Gothe, K. A. Griffioen, B. Guegan, M. Guidal, L. Guo, H. Hakobyan, C. Hanretty, M. Hattawy, K. Hicks, M. Holtrop, S. M. Hughes, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, D. Jenkins, H. Jiang, H. S. Jo, K. Joo, S. Joosten, D. Keller, M. Khandaker, A. Kim, W. Kim, A. Klein, F. J. Klein, V. Kubarovsky, S. E. Kuhn, S. V. Kuleshov, P. Lenisa, K. Livingston, H. Y. Lu, I. J.D. Macgregor, N. Markov, D. Martinez, B. McKinnon, V. Mokeev, R. A. Montgomery, H. Moutarde, C. Munoz Camacho, P. Nadel-Turonski, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, M. Paolone, E. Pasyuk, P. Peng, W. Phelps, J. J. Phillips, S. Pisano, O. Pogorelko, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, A. J.R. Puckett, B. A. Raue, M. Ripani, A. Rizzo, G. Rosner, P. Rossi, P. Roy, F. Sabatié, C. Salgado, D. Schott, R. A. Schumacher, E. Seder, Y. G. Sharabian, A. Simonyan, Iu Skorodumina, E. S. Smith, G. D. Smith, N. Sparveris, P. Stoler, I. I. Strakovsky, S. Strauch, V. Sytnik, M. Taiuti, W. Tang, C. E. Taylor, Ye Tian, A. Trivedi, M. Ungaro, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Watts, X. Wei, L. B. Weinstein, M. H. Wood, N. Zachariou, L. Zana, J. Zhang, Z. W. Zhao, I. Zonta

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Abstract

Differential cross sections of the exclusive process ep→e′π+n were measured with good precision in the range of the photon virtuality Q2=1.8-4.5 GeV2 and the invariant mass range of the π+n final state W=1.6-2.0 GeV using the Continuous Electron Beam Accelerator Facility Large Acceptance Spectrometer. Data were collected with nearly complete coverage in the azimuthal and polar angles of the nπ+ center-of-mass system. More than 37000 cross-section points were measured. The contributions of the isospin I=12 resonances N(1675)52-,N(1680)52+, and N(1710)12+ were extracted at different values of Q2 using a single-channel, energy-dependent resonance amplitude analysis. Two different approaches, the unitary isobar model and the fixed-t dispersion relations, were employed in the analysis. We observe significant strength of the N(1675)52- in the A1/2 amplitude, which is in strong disagreement with quark models that predict both transverse amplitudes to be strongly suppressed. For the N(1680)52+ we observe a slow changeover from the dominance of the A3/2 amplitude at the real photon point (Q2=0) to a Q2 where A1/2 begins to dominate. The scalar amplitude S1/2 drops rapidly with Q2 consistent with quark model prediction. For the N(1710)12+ resonance our analysis shows significant strength for the A1/2 amplitude at Q2<2.5 GeV2.

Original language	English
Article number	045203
Journal	Physical Review C - Nuclear Physics
Volume	91
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.91.045203
State	Published - 13 Apr 2015

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10.1103/PhysRevC.91.045203

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Park, K., Aznauryan, I. G., Burkert, V. D., Adhikari, K. P., Amaryan, M. J., Pereira, S. A., Avakian, H., Battaglieri, M., Badui, R., Bedlinskiy, I., Biselli, A. S., Bono, J., Briscoe, W. J., Brooks, W. K., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., ... Zonta, I. (2015). Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al. Physical Review C - Nuclear Physics, 91(4), Article 045203. https://doi.org/10.1103/PhysRevC.91.045203

@article{b0ea14280da140e8b41848ea5373693c,

title = "Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al.",

abstract = "Differential cross sections of the exclusive process ep→e′π+n were measured with good precision in the range of the photon virtuality Q2=1.8-4.5 GeV2 and the invariant mass range of the π+n final state W=1.6-2.0 GeV using the Continuous Electron Beam Accelerator Facility Large Acceptance Spectrometer. Data were collected with nearly complete coverage in the azimuthal and polar angles of the nπ+ center-of-mass system. More than 37000 cross-section points were measured. The contributions of the isospin I=12 resonances N(1675)52-,N(1680)52+, and N(1710)12+ were extracted at different values of Q2 using a single-channel, energy-dependent resonance amplitude analysis. Two different approaches, the unitary isobar model and the fixed-t dispersion relations, were employed in the analysis. We observe significant strength of the N(1675)52- in the A1/2 amplitude, which is in strong disagreement with quark models that predict both transverse amplitudes to be strongly suppressed. For the N(1680)52+ we observe a slow changeover from the dominance of the A3/2 amplitude at the real photon point (Q2=0) to a Q2 where A1/2 begins to dominate. The scalar amplitude S1/2 drops rapidly with Q2 consistent with quark model prediction. For the N(1710)12+ resonance our analysis shows significant strength for the A1/2 amplitude at Q2<2.5 GeV2.",

author = "K. Park and Aznauryan, {I. G.} and Burkert, {V. D.} and Adhikari, {K. P.} and Amaryan, {M. J.} and Pereira, {S. Anefalos} and H. Avakian and M. Battaglieri and R. Badui and I. Bedlinskiy and Biselli, {A. S.} and J. Bono and Briscoe, {W. J.} and Brooks, {W. K.} and Carman, {D. S.} and A. Celentano and S. Chandavar and G. Charles and L. Colaneri and Cole, {P. L.} and M. Contalbrigo and O. Cortes and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and A. Deur and C. Djalali and D. Doughty and R. Dupre and H. Egiyan and Alaoui, {A. El} and L. Elouadrhiri and Fassi, {L. El} and P. Eugenio and G. Fedotov and S. Fegan and R. Fersch and A. Filippi and Fleming, {J. A.} and B. Garillon and M. Gar{\c c}on and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Joo, {H. S.} and Goetz, {J. T.} and E. Golovatch and Gothe, {R. W.} and Griffioen, {K. A.} and B. Guegan and M. Guidal and L. Guo and H. Hakobyan and C. Hanretty and M. Hattawy and K. Hicks and M. Holtrop and Hughes, {S. M.} and Hyde, {C. E.} and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and D. Jenkins and H. Jiang and Jo, {H. S.} and K. Joo and S. Joosten and D. Keller and M. Khandaker and A. Kim and W. Kim and A. Klein and Klein, {F. J.} and V. Kubarovsky and Kuhn, {S. E.} and Kuleshov, {S. V.} and P. Lenisa and K. Livingston and Lu, {H. Y.} and Macgregor, {I. J.D.} and N. Markov and D. Martinez and B. McKinnon and V. Mokeev and Montgomery, {R. A.} and H. Moutarde and Camacho, {C. Munoz} and P. Nadel-Turonski and S. Niccolai and G. Niculescu and I. Niculescu and M. Osipenko and Ostrovidov, {A. I.} and M. Paolone and E. Pasyuk and P. Peng and W. Phelps and Phillips, {J. J.} and S. Pisano and O. Pogorelko and Price, {J. W.} and S. Procureur and Y. Prok and D. Protopopescu and Puckett, {A. J.R.} and Raue, {B. A.} and M. Ripani and A. Rizzo and G. Rosner and P. Rossi and P. Roy and F. Sabati{\'e} and C. Salgado and D. Schott and Schumacher, {R. A.} and E. Seder and Sharabian, {Y. G.} and A. Simonyan and Iu Skorodumina and Smith, {E. S.} and Smith, {G. D.} and N. Sparveris and P. Stoler and Strakovsky, {I. I.} and S. Strauch and V. Sytnik and M. Taiuti and W. Tang and Taylor, {C. E.} and Ye Tian and A. Trivedi and M. Ungaro and H. Voskanyan and E. Voutier and Walford, {N. K.} and Watts, {D. P.} and X. Wei and Weinstein, {L. B.} and Wood, {M. H.} and N. Zachariou and L. Zana and J. Zhang and Zhao, {Z. W.} and I. Zonta",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = apr,

day = "13",

doi = "10.1103/PhysRevC.91.045203",

language = "English",

volume = "91",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

Park, K, Aznauryan, IG, Burkert, VD, Adhikari, KP, Amaryan, MJ, Pereira, SA, Avakian, H, Battaglieri, M, Badui, R, Bedlinskiy, I, Biselli, AS, Bono, J, Briscoe, WJ, Brooks, WK, Carman, DS, Celentano, A, Chandavar, S, Charles, G, Colaneri, L, Cole, PL, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, Alaoui, AE, Elouadrhiri, L, Fassi, LE, Eugenio, P, Fedotov, G, Fegan, S, Fersch, R, Filippi, A, Fleming, JA, Garillon, B, Garçon, M, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Joo, HS, Goetz, JT, Golovatch, E, Gothe, RW, Griffioen, KA, Guegan, B, Guidal, M, Guo, L, Hakobyan, H, Hanretty, C, Hattawy, M, Hicks, K, Holtrop, M, Hughes, SM, Hyde, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Jenkins, D, Jiang, H, Jo, HS, Joo, K, Joosten, S, Keller, D, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, FJ, Kubarovsky, V, Kuhn, SE, Kuleshov, SV, Lenisa, P, Livingston, K, Lu, HY, Macgregor, IJD, Markov, N, Martinez, D, McKinnon, B, Mokeev, V, Montgomery, RA, Moutarde, H, Camacho, CM, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, AI, Paolone, M, Pasyuk, E, Peng, P, Phelps, W, Phillips, JJ, Pisano, S, Pogorelko, O, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Puckett, AJR, Raue, BA, Ripani, M, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Sabatié, F, Salgado, C, Schott, D, Schumacher, RA, Seder, E, Sharabian, YG, Simonyan, A, Skorodumina, I, Smith, ES, Smith, GD, Sparveris, N, Stoler, P, Strakovsky, II, Strauch, S, Sytnik, V, Taiuti, M, Tang, W, Taylor, CE, Tian, Y, Trivedi, A, Ungaro, M, Voskanyan, H, Voutier, E, Walford, NK, Watts, DP, Wei, X, Weinstein, LB, Wood, MH, Zachariou, N, Zana, L, Zhang, J, Zhao, ZW & Zonta, I 2015, 'Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al.', Physical Review C - Nuclear Physics, vol. 91, no. 4, 045203. https://doi.org/10.1103/PhysRevC.91.045203

TY - JOUR

T1 - Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al.

AU - Park, K.

AU - Aznauryan, I. G.

AU - Burkert, V. D.

AU - Adhikari, K. P.

AU - Amaryan, M. J.

AU - Pereira, S. Anefalos

AU - Avakian, H.

AU - Battaglieri, M.

AU - Badui, R.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Bono, J.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Colaneri, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - D'Angelo, 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 - Egiyan, H.

AU - Alaoui, A. El

AU - Elouadrhiri, L.

AU - Fassi, L. El

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fegan, S.

AU - Fersch, R.

AU - Filippi, A.

AU - Fleming, J. A.

AU - Garillon, B.

AU - Garçon, M.

AU - Gevorgyan, N.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Joo, H. S.

AU - Goetz, J. T.

AU - Golovatch, E.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guegan, B.

AU - Guidal, M.

AU - Guo, L.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Hattawy, M.

AU - Hicks, K.

AU - Holtrop, M.

AU - Hughes, S. M.

AU - Hyde, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Jenkins, D.

AU - Jiang, H.

AU - Jo, H. S.

AU - Joo, K.

AU - Joosten, S.

AU - Keller, D.

AU - Khandaker, M.

AU - Kim, A.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Kubarovsky, V.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Lenisa, P.

AU - Livingston, K.

AU - Lu, H. Y.

AU - Macgregor, I. J.D.

AU - Markov, N.

AU - Martinez, D.

AU - McKinnon, B.

AU - Mokeev, V.

AU - Montgomery, R. A.

AU - Moutarde, H.

AU - Camacho, C. Munoz

AU - Nadel-Turonski, P.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Paolone, M.

AU - Pasyuk, E.

AU - Peng, P.

AU - Phelps, W.

AU - Phillips, J. J.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Puckett, A. J.R.

AU - Raue, B. A.

AU - Ripani, M.

AU - Rizzo, A.

AU - Rosner, G.

AU - Rossi, P.

AU - Roy, P.

AU - Sabatié, F.

AU - Salgado, C.

AU - Schott, D.

AU - Schumacher, R. A.

AU - Seder, E.

AU - Sharabian, Y. G.

AU - Simonyan, A.

AU - Skorodumina, Iu

AU - Smith, E. S.

AU - Smith, G. D.

AU - Sparveris, N.

AU - Stoler, P.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Sytnik, V.

AU - Taiuti, M.

AU - Tang, W.

AU - Taylor, C. E.

AU - Tian, Ye

AU - Trivedi, A.

AU - Ungaro, M.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Walford, N. K.

AU - Watts, D. P.

AU - Wei, X.

AU - Weinstein, L. B.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, Z. W.

AU - Zonta, I.

PY - 2015/4/13

Y1 - 2015/4/13

N2 - Differential cross sections of the exclusive process ep→e′π+n were measured with good precision in the range of the photon virtuality Q2=1.8-4.5 GeV2 and the invariant mass range of the π+n final state W=1.6-2.0 GeV using the Continuous Electron Beam Accelerator Facility Large Acceptance Spectrometer. Data were collected with nearly complete coverage in the azimuthal and polar angles of the nπ+ center-of-mass system. More than 37000 cross-section points were measured. The contributions of the isospin I=12 resonances N(1675)52-,N(1680)52+, and N(1710)12+ were extracted at different values of Q2 using a single-channel, energy-dependent resonance amplitude analysis. Two different approaches, the unitary isobar model and the fixed-t dispersion relations, were employed in the analysis. We observe significant strength of the N(1675)52- in the A1/2 amplitude, which is in strong disagreement with quark models that predict both transverse amplitudes to be strongly suppressed. For the N(1680)52+ we observe a slow changeover from the dominance of the A3/2 amplitude at the real photon point (Q2=0) to a Q2 where A1/2 begins to dominate. The scalar amplitude S1/2 drops rapidly with Q2 consistent with quark model prediction. For the N(1710)12+ resonance our analysis shows significant strength for the A1/2 amplitude at Q2<2.5 GeV2.

AB - Differential cross sections of the exclusive process ep→e′π+n were measured with good precision in the range of the photon virtuality Q2=1.8-4.5 GeV2 and the invariant mass range of the π+n final state W=1.6-2.0 GeV using the Continuous Electron Beam Accelerator Facility Large Acceptance Spectrometer. Data were collected with nearly complete coverage in the azimuthal and polar angles of the nπ+ center-of-mass system. More than 37000 cross-section points were measured. The contributions of the isospin I=12 resonances N(1675)52-,N(1680)52+, and N(1710)12+ were extracted at different values of Q2 using a single-channel, energy-dependent resonance amplitude analysis. Two different approaches, the unitary isobar model and the fixed-t dispersion relations, were employed in the analysis. We observe significant strength of the N(1675)52- in the A1/2 amplitude, which is in strong disagreement with quark models that predict both transverse amplitudes to be strongly suppressed. For the N(1680)52+ we observe a slow changeover from the dominance of the A3/2 amplitude at the real photon point (Q2=0) to a Q2 where A1/2 begins to dominate. The scalar amplitude S1/2 drops rapidly with Q2 consistent with quark model prediction. For the N(1710)12+ resonance our analysis shows significant strength for the A1/2 amplitude at Q2<2.5 GeV2.

UR - http://www.scopus.com/inward/record.url?scp=84928887889&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.91.045203

DO - 10.1103/PhysRevC.91.045203

M3 - Article

AN - SCOPUS:84928887889

SN - 0556-2813

VL - 91

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 045203

ER -

Measurements of ep→e′π+n at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS MEASUREMENTS of ep→e′π+n ⋯ K. PARK et al.

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