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First measurement of target and double spin asymmetries fore→p→→epπ0in the nucleon resonance region above theΔ(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 (+188 others)
2008 Physical Review C  

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2008 pre-print
arXiv:0804.3079v2 fatcat:v3cmkl7tv5hmvllltue5l3fqha
2008 accepted
arXiv:0804.3079v3 fatcat:akzfoc76afapvgyh66ovyuorhu
2008 pre-print
arXiv:0804.3079v1 fatcat:kionhit5pndc5mwvdilvdqavgi
The exclusive channel polarized proton(polarized e,e prime p)pi0 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 (CLAS). Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the pi0 and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to
more » ... 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 A_1/2 and S_1/2 for the Roper resonance N(1400)P11, and the N(1535)S11 and N(1520)D13 states.
doi:10.1103/physrevc.78.045204 fatcat:32vwewzzuzbprng75d57jcds6q
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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, M. 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, B. G. 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. "First measurement of target and double spin asymmetries fore→p→→epπ0in the nucleon resonance region above theΔ(1232)." Physical Review C 78.4 (2008)