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Cross sections and beam asymmetries for e→p→enπ+ in the nucleon resonance region for 1.7≤Q2≤4.5 GeV2

  • K. Park
  • , V. D. Burkert
  • , W. Kim
  • , I. G. Aznauryan
  • , R. Minehart
  • , L. C. Smith
  • , K. Joo
  • , L. Elouadrhiri
  • , G. Adams
  • , M. J. Amaryan
  • , P. Ambrozewicz
  • , M. Anghinolfi
  • , G. Asryan
  • , H. Avakian
  • , H. Bagdasaryan
  • , N. Baillie
  • , J. P. Ball
  • , N. A. Baltzell
  • , S. Barrow
  • , V. Batourine
  • M. Battaglieri, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, B. E. Bonner, C. Bookwalter, S. Bouchigny, S. Boiarinov, 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, A. Cazes, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Cords, P. Corvisiero, D. Crabb, V. Crede, J. P. Cummings, D. Dale, N. Dashyan, R. De Masi, R. De Vita, E. De Sanctis, P. V. Degtyarenko, H. Denizli, L. Dennis, A. Deur, S. Dhamija, K. V. Dharmawardane, K. S. Dhuga, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, P. Eugenio, R. Fatemi, G. Fedotov, G. Feldman, R. J. Feuerbach, T. A. Forest, A. Fradi, H. Funsten, M. Y. Gabrielyan, M. Garçon, G. Gavalian, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, E. Golovatch, A. Gonenc, C. I.O. Gordon, R. W. Gothe, L. Graham, K. A. Griffioen, M. Guidal, M. Guillo, N. Guler, L. Guo, V. Gyurjyan, C. Hadjidakis, K. Hafidi, K. Hafnaoui, H. Hakobyan, R. S. Hakobyan, C. Hanretty, J. Hardie, N. Hassall, D. Heddle, F. W. Hersman, 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, H. G. Juengst, N. Kalantarians, D. Keller, J. D. Kellie, M. Khandaker, K. Y. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Klusman, M. Kossov, Z. Krahn, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, V. Kuznetsov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, Ji Li, A. C.S. Lima, K. Livingston, H. Y. Lu, K. Lukashin, M. MacCormick, N. Markov, P. Mattione, S. McAleer, B. McKinnon, J. W.C. McNabb, B. A. Mecking, S. Mehrabyan, J. J. Melone, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, L. Morand, B. Moreno, K. Moriya, S. A. Morrow, M. Moteabbed, J. Mueller, 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, G. V. O'Rielly, M. Osipenko, A. I. Ostrovidov, S. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, S. A. Philips, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, I. Popa, S. Pozdniakov, B. M. Preedom, J. W. Price, Y. Prok, D. Protopopescu, L. M. Qin, B. A. Raue, G. Riccardi, G. Ricco, M. Ripani, B. G. Ritchie, F. Ronchetti, G. Rosner, P. Rossi, D. Rowntree, P. D. Rubin, 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, J. Shaw, N. V. Shvedunov, A. V. Skabelin, 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, R. Suleiman, M. Taiuti, T. Takeuchi, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, L. Todor, C. Tur, 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, J. Yun, M. Yurov, L. Zana, B. Zhang, J. Zhang, B. Zhao, Z. W. Zhao
  • Kyungpook National University
  • Thomas Jefferson National Accelerator Facility
  • Lomonosov Moscow State University
  • A. Alikhanian Yerevan Institute of Physics
  • University of Virginia
  • University of Connecticut
  • Christopher Newport University
  • Rensselaer Polytechnic Institute
  • Old Dominion University
  • Florida International University
  • National Institute for Nuclear Physics
  • College of William and Mary
  • Arizona State University
  • University of South Carolina
  • Florida State University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Carnegie Mellon University
  • TRIUMF
  • George Washington University
  • Fairfield University
  • Rice University
  • Institut de Physique Nucléaire Orsay
  • University of Edinburgh
  • University of New Hampshire
  • Ohio University
  • Catholic University of America
  • Idaho State University
  • CEA Saclay
  • University of Pittsburgh
  • University of Glasgow
  • Argonne National Laboratory
  • University of Richmond
  • James Madison University
  • University of California at Los Angeles
  • Virginia Polytechnic Institute and State University
  • Norfolk State University
  • University of Massachusetts
  • California State University Dominguez Hills
  • Massachusetts Institute of Technology
  • German Research Foundation
  • Union College

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

69 Scopus citations

Abstract

The exclusive electroproduction process e→p→e'nπ+ was measured in the range of the photon virtuality Q2=1.7-4.5 GeV2, and the invariant mass range for the nπ+ system of W=1.15-1.7 GeV using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive π+ production from protons with nearly full coverage in the azimuthal and polar angles of the nπ+ center-of-mass system. The nπ+ channel has particular sensitivity to the isospin 1/2 excited nucleon states, and together with the pπ0 final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the σLT' structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.

Original languageEnglish
Article number015208
JournalPhysical Review C - Nuclear Physics
Volume77
Issue number1
DOIs
StatePublished - 22 Jan 2008

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