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Q2 dependence of the S11(1535) photocoupling and evidence for a P-wave resonance in η electroproduction

  • H. Denizli
  • , J. Mueller
  • , S. Dytman
  • , M. L. Leber
  • , R. D. Levine
  • , J. Miles
  • , K. Y. Kim
  • , G. Adams
  • , M. J. Amaryan
  • , P. Ambrozewicz
  • , M. Anghinolfi
  • , B. Asavapibhop
  • , G. Asryan
  • , H. Avakian
  • , H. Bagdasaryan
  • , N. Baillie
  • , J. P. Ball
  • , N. A. Baltzell
  • , S. Barrow
  • , V. Batourine
  • M. Battaglieri, K. Beard, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, N. Bianchi, A. S. Biselli, B. E. Bonner, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, C. Cetina, S. Chen, P. L. Cole, A. Coleman, P. Collins, P. Coltharp, D. Cords, P. Corvisiero, D. Crabb, V. Crede, J. P. Cummings, N. Dashyan, R. De Vita, E. De Sanctis, P. V. Degtyarenko, L. Dennis, A. Deur, K. S. Dhuga, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, P. Dragovitsch, M. Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, A. Empl, P. Eugenio, L. Farhi, R. Fatemi, G. Fedotov, G. Feldman, R. J. Feuerbach, T. A. Forest, V. Frolov, H. Funsten, S. J. Gaff, M. Garçon, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, P. Girard, F. X. Girod, J. T. Goetz, A. Gonenc, R. W. Gothe, K. A. Griffioen, M. Guidal, M. Guillo, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, H. Hakobyan, R. S. Hakobyan, J. Hardie, D. Heddle, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, J. Hu, C. E. Hyde-Wright, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, H. S. Jo, K. Joo, H. G. Juengst, N. Kalantarians, J. H. Kelley, J. D. Kellie, M. Khandaker, K. Kim, W. Kim, A. Klein, F. J. Klein, M. Klusman, M. Kossov, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, K. Livingston, H. Y. Lu, K. Lukashin, M. MacCormick, J. J. Manak, N. Markov, S. McAleer, B. McKinnon, J. W.C. McNabb, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, R. Minehart, M. Mirazita, R. Miskimen, V. Mokeev, K. Moriya, S. A. Morrow, M. Moteabbed, V. Muccifora, G. S. Mutchler, P. Nadel-Turonski, J. Napolitano, R. Nasseripour, S. O. Nelson, 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, K. Park, E. Pasyuk, C. Paterson, G. Peterson, S. A. Philips, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, 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, K. Sabourov, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, A. Shafi, Y. G. Sharabian, J. Shaw, N. V. Shvedunov, S. Simionatto, A. V. Skabelin, E. S. Smith, L. C. Smith, D. I. Sober, D. Sokhan, M. Spraker, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, S. Taylor, D. J. Tedeschi, U. Thoma, R. Thompson, A. Tkabladze, S. Tkachenko, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, K. Wang, D. P. Watts, L. B. Weinstein, H. Weller, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, J. Yun, L. Zana, J. Zhang, B. Zhao, Z. W. Zhao
  • Abant Izzet Baysal University
  • University of Pittsburgh
  • Rensselaer Polytechnic Institute
  • Old Dominion University
  • Florida International University
  • National Institute for Nuclear Physics
  • University of Massachusetts
  • A. Alikhanian Yerevan Institute of Physics
  • Thomas Jefferson National Accelerator Facility
  • College of William and Mary
  • Arizona State University
  • University of South Carolina
  • Florida State University
  • Kyungpook National University
  • James Madison University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Ohio University
  • Carnegie Mellon University
  • George Washington University
  • Fairfield University
  • Rice University
  • Institut de Physique Nucléaire Orsay
  • University of Edinburgh
  • University of New Hampshire
  • Idaho State University
  • Systems Planning and Analysis, Inc.
  • University of Virginia
  • University of Glasgow
  • Christopher Newport University
  • Argonne National Laboratory
  • CEA Saclay
  • Lomonosov Moscow State University
  • Duke University
  • University of Richmond
  • University of California at Los Angeles
  • Catholic University of America
  • Virginia Polytechnic Institute and State University
  • University of Connecticut
  • Norfolk State University
  • California State University Dominguez Hills
  • Massachusetts Institute of Technology
  • Universidade de São Paulo
  • Justus Liebig University Giessen
  • Union College

Research output: Contribution to journalArticlepeer-review

102 Scopus citations

Abstract

New cross sections for the reaction ep→e'ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W~1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q2. Improved values are derived for the photocoupling amplitude for the S11(1535) resonance. The new data greatly expand the Q2 range covered, and an interpretation of all data with a consistent parametrization is provided.

Original languageEnglish
Article number015204
JournalPhysical Review C - Nuclear Physics
Volume76
Issue number1
DOIs
StatePublished - 27 Jul 2007

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