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Beam asymmetry Σ for π + and π 0 photoproduction on the proton for photon energies from 1.102 to 1.862 GeV

  • M. Dugger
  • , B. G. Ritchie
  • , P. Collins
  • , E. Pasyuk
  • , W. J. Briscoe
  • , I. I. Strakovsky
  • , R. L. Workman
  • , Y. Azimov
  • , K. P. Adhikari
  • , D. Adikaram
  • , M. Aghasyan
  • , M. J. Amaryan
  • , M. D. Anderson
  • , S. Anefalos Pereira
  • , H. Avakian
  • , J. Ball
  • , N. A. Baltzell
  • , M. Battaglieri
  • , V. Batourine
  • , I. Bedlinskiy
  • A. S. Biselli, S. Boiarinov, V. D. Burkert, D. S. Carman, A. Celentano, S. Chandavar, 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. El Fassi, P. Eugenio, G. Fedotov, S. Fegan, J. A. Fleming, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, K. Hafidi, H. Hakobyan, C. Hanretty, N. Harrison, D. Heddle, K. Hicks, D. Ho, M. Holtrop, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, H. S. Jo, K. Joo, D. Keller, M. Khandaker, W. Kim, A. Klein, F. J. Klein, S. Koirala, A. Kubarovsky, V. Kubarovsky, S. V. Kuleshov, S. Lewis, K. Livingston, H. Y. Lu, I. J.D. Macgregor, D. Martinez, M. Mayer, B. McKinnon, T. Mineeva, M. Mirazita, V. Mokeev, R. A. Montgomery, H. Moutarde, E. Munevar, C. Munoz Camacho, P. Nadel-Turonski, C. S. Nepali, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, L. L. Pappalardo, R. Paremuzyan, K. Park, S. Park, E. Phelps, J. J. Phillips, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, D. Rimal, M. Ripani, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, C. Salgado, D. Schott, R. A. Schumacher, E. Seder, H. Seraydaryan, Y. G. Sharabian, G. D. Smith, D. I. Sober, D. Sokhan, S. S. Stepanyan, P. Stoler, S. Strauch, M. Taiuti, W. Tang, Ye Tian, S. Tkachenko, B. Torayev, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Watts, D. P. Weygand, N. Zachariou, L. Zana, J. Zhang, Z. W. Zhao, I. Zonta
  • Arizona State University
  • George Washington University
  • RAS - Saint Petersburg Nuclear Physics Institute
  • Old Dominion University
  • National Institute for Nuclear Physics
  • University of Glasgow
  • Thomas Jefferson National Accelerator Facility
  • CEA Saclay
  • Argonne National Laboratory
  • University of South Carolina
  • Kyungpook National University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Carnegie Mellon University
  • Fairfield University
  • Ohio University
  • Idaho State University
  • Florida State University
  • University of Rome Tor Vergata
  • A. Alikhanian Yerevan Institute of Physics
  • Christopher Newport University
  • Institut de Physique Nucléaire Orsay
  • University of New Hampshire
  • Lomonosov Moscow State University
  • University of Edinburgh
  • University of Richmond
  • James Madison University
  • University of Connecticut
  • College of William and Mary
  • Florida International University
  • Universidad Técnica Federico Santa Maria
  • University of Virginia
  • Norfolk State University
  • Catholic University of America
  • Rensselaer Polytechnic Institute
  • California State University Dominguez Hills
  • University of Genoa
  • Université Joseph Fourier Grenoble 1

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Beam asymmetries for the reactions γp→pπ0 and γp→nπ+ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged, linearly polarized photon beam with energies from 1.102-1.862 GeV. A Fourier moment technique for extracting beam asymmetries from experimental data is described. The results reported here possess greater precision and finer energy resolution than previous measurements. Our data for both pion reactions appear to favor the SAID and Bonn-Gatchina scattering analyses over the older Mainz MAID predictions. After incorporating the present set of beam asymmetries into the world database, exploratory fits made with the SAID analysis indicate that the largest changes from previous fits are for properties of the Δ(1700)3/2- and Δ(1905)5/2+ states.

Original languageEnglish
Article number065203
JournalPhysical Review C - Nuclear Physics
Volume88
Issue number6
DOIs
StatePublished - 18 Dec 2013

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