First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232)

A. S. Biselli; V. D. Burkert; M. J. Amaryan; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; M. Battaglieri; I. Bedlinskiy; M. Bellis; N. Benmouna; B. L. Berman; L. Blaszczyk; C. Bookwalter; S. Boiarinov; P. Bosted; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bültmann; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; L. Casey; S. Chen; L. Cheng; P. L. Cole; P. Collins; P. Coltharp; D. Crabb; V. Crede; D. Dale; N. Dashyan; R. De Masi; R. De Vita; E. De Sanctis; P. V. Degtyarenko; A. Deur; S. Dhamija; R. Dickson; C. Djalali; G. E. Dodge; D. Doughty; Michael Dugger; O. P. Dzyubak; H. Egiyan; L. El Fassi; L. Elouadrhiri; P. Eugenio; G. Fedotov; R. Feuerbach; R. Fersch; T. A. Forest; A. Fradi; M. Garçon; G. Gavaliann; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; W. Gohn; R. W. Gothe; L. Graham; K. A. Griffioen; M. Guidal; N. Guler; L. Guo; V. Gyurjyan; K. Hafidi; H. Hakobyan; C. Hanretty; N. Hassall; K. Hicks; I. Hleiqawi; M. Holtrop; C. E. Hyde-Wright; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; M. M. Ito; D. Jenkins; H. S. Jo; J. R. Johnstone; K. Joo; H. G. Juengst; N. Kalantarians; D. Keller; J. D. Kellie; M. Khandaker; W. Kim; A. Klein; F. J. Klein; M. Kossov; Z. Krahn; V. Kubarovsky; J. Kuhn; S. E. Kuhn; S. V. Kuleshov; V. Kuznetsov; J. Lachniet; J. M. Laget; J. Langheinrich; D. Lawrence; K. Livingston; H. Y. Lu; M. MacCormick; N. Markov; P. Mattione; B. McKinnon; J. W C McNabb; B. A. Mecking; M. D. Mestayer; C. A. Meyer; T. Mibe; K. Mikhailov; M. Mirazita; V. Mokeev; B. Moreno; K. Moriya; S. A. Morrow; M. Moteabbed; E. Munevar; G. S. Mutchler; P. Nadel-Turonski; R. Nasseripour; S. Niccolai; G. Niculescu; I. Niculescu; B. B. Niczyporuk; M. R. Niroula; R. A. Niyazov; M. Nozar; M. Osipenko; A. I. Ostrovidov; K. Park; S. Park; E. Pasyuk; C. Paterson; S. Anefalos Pereira; J. Pierce; N. Pivnyuk; O. Pogorelko; S. Pozdniakov; J. W. Price; Y. Prok; D. Protopopescu; B. A. Raue; G. Ricco; M. Ripani; Barry Ritchie; G. Rosner; P. Rossi; F. Sabatié; M. S. Saini; J. Salamanca; C. Salgado; J. P. Santoro; V. Sapunenko; D. Schott; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; D. Sharov; N. V. Shvedunov; E. S. Smith; D. I. Sober; D. Sokhan; A. Stavinsky; S. S. Stepanyan; S. Stepanyan; B. E. Stokes; P. Stoler; I. I. Strakovsky; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Tkabladze; S. Tkachenko; L. Todor; M. Ungaro; M. F. Vineyard; A. V. Vlassov; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; M. Yurov; L. Zana; J. Zhang; B. Zhao; Z. W. Zhao

doi:10.1103/PhysRevC.78.045204

First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232)

A. S. Biselli, V. D. Burkert, M. J. Amaryan, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, M. Battaglieri, I. Bedlinskiy, M. Bellis, N. Benmouna, B. L. Berman, L. Blaszczyk, C. Bookwalter, S. Boiarinov, P. Bosted, R. Bradford, D. BranfordW. J. Briscoe, W. K. Brooks, S. Bültmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, D. Dale, N. Dashyan, R. De Masi, R. De Vita, E. De Sanctis, P. V. Degtyarenko, A. Deur, S. Dhamija, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, Michael Dugger, O. P. Dzyubak, H. Egiyan, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, R. Feuerbach, R. Fersch, T. A. Forest, A. Fradi, M. Garçon, G. Gavaliann, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, R. W. Gothe, L. Graham, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, H. Hakobyan, C. Hanretty, N. Hassall, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, H. S. Jo, J. R. Johnstone, K. Joo, H. G. Juengst, N. Kalantarians, D. Keller, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, M. Kossov, Z. Krahn, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, V. Kuznetsov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, K. Livingston, H. Y. Lu, M. MacCormick, N. Markov, P. Mattione, B. McKinnon, J. W C McNabb, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, M. Mirazita, V. Mokeev, B. Moreno, K. Moriya, S. A. Morrow, M. Moteabbed, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, R. A. Niyazov, M. Nozar, M. Osipenko, A. I. Ostrovidov, K. Park, S. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, J. Pierce, N. Pivnyuk, O. Pogorelko, S. Pozdniakov, J. W. Price, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, Barry Ritchie, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, D. Schott, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, E. S. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, L. Todor, M. Ungaro, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, M. Yurov, L. Zana, J. Zhang, B. Zhao, Z. W. Zhao

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

The exclusive channel p→(e→,e'p)π0 was studied in the first and second nucleon resonance regions in the Q2 range from 0.187 to 0.770 GeV2 at Jefferson Lab using the CEBAF Large Acceptance Spectrometer. Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the π0 and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to individual models was observed, in particular for the target asymmetry and in the higher invariant mass region. This data set, once included in the global fits of the above models, is expected to place strong constraints on the electrocoupling amplitudes A1/2 and S1/2 for the Roper resonance N(1400)P11 and the N(1535)S11 and N(1520)D13 states.

Original language	English (US)
Article number	045204
Journal	Physical Review C - Nuclear Physics
Volume	78
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.78.045204
State	Published - Oct 16 2008

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1103/PhysRevC.78.045204

Cite this

Biselli, A. S., Burkert, V. D., Amaryan, M. J., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B. L., Blaszczyk, L., Bookwalter, C., Boiarinov, S., Bosted, P., Bradford, R., ... Zhao, Z. W. (2008). First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232). Physical Review C - Nuclear Physics, 78(4), Article 045204. https://doi.org/10.1103/PhysRevC.78.045204

Biselli, AS, Burkert, VD, Amaryan, MJ, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Battaglieri, M, Bedlinskiy, I, Bellis, M, Benmouna, N, Berman, BL, Blaszczyk, L, Bookwalter, C, Boiarinov, S, Bosted, P, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bültmann, S, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Casey, L, Chen, S, Cheng, L, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crede, V, Dale, D, Dashyan, N, De Masi, R, De Vita, R, De Sanctis, E, Degtyarenko, PV, Deur, A, Dhamija, S, Dickson, R, Djalali, C, Dodge, GE, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, H, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Feuerbach, R, Fersch, R, Forest, TA, Fradi, A, Garçon, M, Gavaliann, G, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gohn, W, Gothe, RW, Graham, L, Griffioen, KA, Guidal, M, Guler, N, Guo, L, Gyurjyan, V, Hafidi, K, Hakobyan, H, Hanretty, C, Hassall, N, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Ito, MM, Jenkins, D, Jo, HS, Johnstone, JR, Joo, K, Juengst, HG, Kalantarians, N, Keller, D, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Kossov, M, Krahn, Z, Kubarovsky, V, Kuhn, J, Kuhn, SE, Kuleshov, SV, Kuznetsov, V, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Livingston, K, Lu, HY, MacCormick, M, Markov, N, Mattione, P, McKinnon, B, McNabb, JWC, Mecking, BA, Mestayer, MD, Meyer, CA, Mibe, T, Mikhailov, K, Mirazita, M, Mokeev, V, Moreno, B, Moriya, K, Morrow, SA, Moteabbed, M, Munevar, E, Mutchler, GS, Nadel-Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niroula, MR, Niyazov, RA, Nozar, M, Osipenko, M, Ostrovidov, AI, Park, K, Park, S, Pasyuk, E, Paterson, C, Pereira, SA, Pierce, J, Pivnyuk, N, Pogorelko, O, Pozdniakov, S, Price, JW, Prok, Y, Protopopescu, D, Raue, BA, Ricco, G, Ripani, M, Ritchie, B, Rosner, G, Rossi, P, Sabatié, F, Saini, MS, Salamanca, J, Salgado, C, Santoro, JP, Sapunenko, V, Schott, D, Schumacher, RA, Serov, VS, Sharabian, YG, Sharov, D, Shvedunov, NV, Smith, ES, Sober, DI, Sokhan, D, Stavinsky, A, Stepanyan, SS, Stepanyan, S, Stokes, BE, Stoler, P, Strakovsky, II, Strauch, S, Taiuti, M, Tedeschi, DJ, Tkabladze, A, Tkachenko, S, Todor, L, Ungaro, M, Vineyard, MF, Vlassov, AV, Watts, DP, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Yurov, M, Zana, L, Zhang, J, Zhao, B & Zhao, ZW 2008, 'First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232)', Physical Review C - Nuclear Physics, vol. 78, no. 4, 045204. https://doi.org/10.1103/PhysRevC.78.045204

@article{400283afbd80463695bce5ca6110c28b,

title = "First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232)",

abstract = "The exclusive channel p→(e→,e'p)π0 was studied in the first and second nucleon resonance regions in the Q2 range from 0.187 to 0.770 GeV2 at Jefferson Lab using the CEBAF Large Acceptance Spectrometer. Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the π0 and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to individual models was observed, in particular for the target asymmetry and in the higher invariant mass region. This data set, once included in the global fits of the above models, is expected to place strong constraints on the electrocoupling amplitudes A1/2 and S1/2 for the Roper resonance N(1400)P11 and the N(1535)S11 and N(1520)D13 states.",

author = "Biselli, {A. S.} and Burkert, {V. D.} and Amaryan, {M. J.} and G. Asryan and H. Avakian and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and Baltzell, {N. A.} and M. Battaglieri and I. Bedlinskiy and M. Bellis and N. Benmouna and Berman, {B. L.} and L. Blaszczyk and C. Bookwalter and S. Boiarinov and P. Bosted and R. Bradford and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and S. B{\"u}ltmann and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and L. Casey and S. Chen and L. Cheng and Cole, {P. L.} and P. Collins and P. Coltharp and D. Crabb and V. Crede and D. Dale and N. Dashyan and {De Masi}, R. and {De Vita}, R. and {De Sanctis}, E. and Degtyarenko, {P. V.} and A. Deur and S. Dhamija and R. Dickson and C. Djalali and Dodge, {G. E.} and D. Doughty and Michael Dugger and Dzyubak, {O. P.} and H. Egiyan and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and R. Feuerbach and R. Fersch and Forest, {T. A.} and A. Fradi and M. Gar{\c c}on and G. Gavaliann and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Goetz, {J. T.} and W. Gohn and Gothe, {R. W.} and L. Graham and Griffioen, {K. A.} and M. Guidal and N. Guler and L. Guo and V. Gyurjyan and K. Hafidi and H. Hakobyan and C. Hanretty and N. Hassall and K. Hicks and I. Hleiqawi and M. Holtrop and Hyde-Wright, {C. E.} and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and Ito, {M. M.} and D. Jenkins and Jo, {H. S.} and Johnstone, {J. R.} and K. Joo and Juengst, {H. G.} and N. Kalantarians and D. Keller and Kellie, {J. D.} and M. Khandaker and W. Kim and A. Klein and Klein, {F. J.} and M. Kossov and Z. Krahn and V. Kubarovsky and J. Kuhn and Kuhn, {S. E.} and Kuleshov, {S. V.} and V. Kuznetsov and J. Lachniet and Laget, {J. M.} and J. Langheinrich and D. Lawrence and K. Livingston and Lu, {H. Y.} and M. MacCormick and N. Markov and P. Mattione and B. McKinnon and McNabb, {J. W C} and Mecking, {B. A.} and Mestayer, {M. D.} and Meyer, {C. A.} and T. Mibe and K. Mikhailov and M. Mirazita and V. Mokeev and B. Moreno and K. Moriya and Morrow, {S. A.} and M. Moteabbed and E. Munevar and Mutchler, {G. S.} and P. Nadel-Turonski and R. Nasseripour and S. Niccolai and G. Niculescu and I. Niculescu and Niczyporuk, {B. B.} and Niroula, {M. R.} and Niyazov, {R. A.} and M. Nozar and M. Osipenko and Ostrovidov, {A. I.} and K. Park and S. Park and E. Pasyuk and C. Paterson and Pereira, {S. Anefalos} and J. Pierce and N. Pivnyuk and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and Y. Prok and D. Protopopescu and Raue, {B. A.} and G. Ricco and M. Ripani and Barry Ritchie and G. Rosner and P. Rossi and F. Sabati{\'e} and Saini, {M. S.} and J. Salamanca and C. Salgado and Santoro, {J. P.} and V. Sapunenko and D. Schott and Schumacher, {R. A.} and Serov, {V. S.} and Sharabian, {Y. G.} and D. Sharov and Shvedunov, {N. V.} and Smith, {E. S.} and Sober, {D. I.} and D. Sokhan and A. Stavinsky and Stepanyan, {S. S.} and S. Stepanyan and Stokes, {B. E.} and P. Stoler and Strakovsky, {I. I.} and S. Strauch and M. Taiuti and Tedeschi, {D. J.} and A. Tkabladze and S. Tkachenko and L. Todor and M. Ungaro and Vineyard, {M. F.} and Vlassov, {A. V.} and Watts, {D. P.} and Weinstein, {L. B.} and Weygand, {D. P.} and M. Williams and E. Wolin and Wood, {M. H.} and A. Yegneswaran and M. Yurov and L. Zana and J. Zhang and B. Zhao and Zhao, {Z. W.}",

year = "2008",

month = oct,

day = "16",

doi = "10.1103/PhysRevC.78.045204",

language = "English (US)",

volume = "78",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

TY - JOUR

T1 - First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232)

AU - Biselli, A. S.

AU - Burkert, V. D.

AU - Amaryan, M. J.

AU - Asryan, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Blaszczyk, L.

AU - Bookwalter, C.

AU - Boiarinov, S.

AU - Bosted, P.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bültmann, S.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Casey, L.

AU - Chen, S.

AU - Cheng, L.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crede, V.

AU - Dale, D.

AU - Dashyan, N.

AU - De Masi, R.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Dhamija, S.

AU - Dickson, R.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Doughty, D.

AU - Dugger, Michael

AU - Dzyubak, O. P.

AU - Egiyan, H.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Feuerbach, R.

AU - Fersch, R.

AU - Forest, T. A.

AU - Fradi, A.

AU - Garçon, M.

AU - Gavaliann, G.

AU - Gevorgyan, N.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gohn, W.

AU - Gothe, R. W.

AU - Graham, L.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guler, N.

AU - Guo, L.

AU - Gyurjyan, V.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Hassall, N.

AU - Hicks, K.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde-Wright, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Ito, M. M.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Johnstone, J. R.

AU - Joo, K.

AU - Juengst, H. G.

AU - Kalantarians, N.

AU - Keller, D.

AU - Kellie, J. D.

AU - Khandaker, M.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Kossov, M.

AU - Krahn, Z.

AU - Kubarovsky, V.

AU - Kuhn, J.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Kuznetsov, V.

AU - Lachniet, J.

AU - Laget, J. M.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Livingston, K.

AU - Lu, H. Y.

AU - MacCormick, M.

AU - Markov, N.

AU - Mattione, P.

AU - McKinnon, B.

AU - McNabb, J. W C

AU - Mecking, B. A.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mibe, T.

AU - Mikhailov, K.

AU - Mirazita, M.

AU - Mokeev, V.

AU - Moreno, B.

AU - Moriya, K.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Munevar, E.

AU - Mutchler, G. S.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Niczyporuk, B. B.

AU - Niroula, M. R.

AU - Niyazov, R. A.

AU - Nozar, M.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Park, K.

AU - Park, S.

AU - Pasyuk, E.

AU - Paterson, C.

AU - Pereira, S. Anefalos

AU - Pierce, J.

AU - Pivnyuk, N.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Saini, M. S.

AU - Salamanca, J.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schott, D.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Sharov, D.

AU - Shvedunov, N. V.

AU - Smith, E. S.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stavinsky, A.

AU - Stepanyan, S. S.

AU - Stepanyan, S.

AU - Stokes, B. E.

AU - Stoler, P.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tedeschi, D. J.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Todor, L.

AU - Ungaro, M.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Weygand, D. P.

AU - Williams, M.

AU - Wolin, E.

AU - Wood, M. H.

AU - Yegneswaran, A.

AU - Yurov, M.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, B.

AU - Zhao, Z. W.

PY - 2008/10/16

Y1 - 2008/10/16

N2 - The exclusive channel p→(e→,e'p)π0 was studied in the first and second nucleon resonance regions in the Q2 range from 0.187 to 0.770 GeV2 at Jefferson Lab using the CEBAF Large Acceptance Spectrometer. Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the π0 and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to individual models was observed, in particular for the target asymmetry and in the higher invariant mass region. This data set, once included in the global fits of the above models, is expected to place strong constraints on the electrocoupling amplitudes A1/2 and S1/2 for the Roper resonance N(1400)P11 and the N(1535)S11 and N(1520)D13 states.

AB - The exclusive channel p→(e→,e'p)π0 was studied in the first and second nucleon resonance regions in the Q2 range from 0.187 to 0.770 GeV2 at Jefferson Lab using the CEBAF Large Acceptance Spectrometer. Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the π0 and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to individual models was observed, in particular for the target asymmetry and in the higher invariant mass region. This data set, once included in the global fits of the above models, is expected to place strong constraints on the electrocoupling amplitudes A1/2 and S1/2 for the Roper resonance N(1400)P11 and the N(1535)S11 and N(1520)D13 states.

UR - http://www.scopus.com/inward/record.url?scp=55049083732&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevC.78.045204

DO - 10.1103/PhysRevC.78.045204

M3 - Article

AN - SCOPUS:55049083732

SN - 0556-2813

VL - 78

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 045204

ER -

First measurement of target and double spin asymmetries for e→p→→epπ0 in the nucleon resonance region above the Δ(1232)

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