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Partial wave analysis of the reaction γp→pω and the search for nucleon resonances

  • M. Williams
  • , D. Applegate
  • , M. Bellis
  • , C. A. Meyer
  • , K. P. Adhikari
  • , M. Anghinolfi
  • , H. Baghdasaryan
  • , J. Ball
  • , M. Battaglieri
  • , I. Bedlinskiy
  • , B. L. Berman
  • , A. S. Biselli
  • , W. J. Briscoe
  • , W. K. Brooks
  • , V. D. Burkert
  • , S. L. Careccia
  • , D. S. Carman
  • , P. L. Cole
  • , P. Collins
  • , V. Crede
  • A. D'Angelo, A. Daniel, R. De Vita, E. De Sanctis, A. Deur, B. B. Dey, S. Dhamija, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, M. Dugger, R. Dupre, A. El Alaoui, L. Elouadrhiri, P. Eugenio, G. Fedotov, S. Fegan, A. Fradi, M. Y. Gabrielyan, M. Garçon, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, K. Hafidi, H. Hakobyan, C. Hanretty, N. Hassall, K. Hicks, M. Holtrop, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, S. S. Jawalkar, H. S. Jo, J. R. Johnstone, K. Joo, D. Keller, M. Khandaker, P. Khetarpal, W. Kim, A. Klein, F. J. Klein, Z. Krahn, V. Kubarovsky, S. V. Kuleshov, V. Kuznetsov, K. Livingston, H. Y. Lu, M. Mayer, J. McAndrew, M. E. McCracken, B. McKinnon, M. Mirazita, V. Mokeev, B. Moreno, K. Moriya, B. Morrison, E. Munevar, P. Nadel-Turonski, C. S. Nepali, S. Niccolai, G. Niculescu, I. Niculescu, M. R. Niroula, R. A. Niyazov, M. Osipenko, A. I. Ostrovidov, M. Paris, K. Park, S. Park, E. Pasyuk, S. Anefalos Pereira, Y. Perrin, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, D. Protopopescu, G. Ricco, M. Ripani, B. G. Ritchie, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, J. Salamanca, C. Salgado, D. Schott, R. A. Schumacher, H. Seraydaryan, Y. G. Sharabian, E. S. Smith, D. I. Sober, D. Sokhan, S. S. Stepanyan, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, S. Tkachenko, M. Ungaro, M. F. Vineyard, E. Voutier, D. P. Watts, D. P. Weygand, M. H. Wood, J. Zhang, B. Zhao
  • Carnegie Mellon University
  • Argonne National Laboratory
  • Stanford University
  • Old Dominion University
  • National Institute for Nuclear Physics
  • University of Virginia
  • CEA Saclay
  • Alikhanov Institute for Theoretical and Experimental Physics
  • George Washington University
  • Fairfield University
  • Thomas Jefferson National Accelerator Facility
  • Universidad Técnica Federico Santa Maria
  • Idaho State University
  • Arizona State University
  • Florida State University
  • University of Rome Tor Vergata
  • Ohio University
  • Florida International University
  • University of South Carolina
  • Christopher Newport University
  • Institut de Physique Nucléaire Orsay
  • Université Joseph Fourier Grenoble 1
  • Lomonosov Moscow State University
  • University of Glasgow
  • University of Richmond
  • James Madison University
  • University of Connecticut
  • College of William and Mary
  • Los Alamos National Laborotory
  • A. Alikhanian Yerevan Institute of Physics
  • University of New Hampshire
  • Norfolk State University
  • Rensselaer Polytechnic Institute
  • Kyungpook National University
  • Catholic University of America
  • University of Minnesota Twin Cities
  • University of Edinburgh
  • California State University Dominguez Hills
  • Union College
  • Canisius College

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

An event-based partial wave analysis (PWA) of the reaction γp→pω has been performed on a high-statistics dataset obtained using the CLAS at Jefferson Lab for center-of-mass energies from threshold up to 2.4 GeV. This analysis benefits from access to the world's first high-precision spin-density matrix element measurements, available to the event-based PWA through the decay distribution of ω→π+π-π0. The data confirm the dominance of the t-channel π0 exchange amplitude in the forward direction. The dominant resonance contributions are consistent with the previously identified states F15(1680) and D13(1700) near threshold, as well as the G17(2190) at higher energies. Suggestive evidence for the presence of a JP=5/2+ state around 2 GeV, a "missing" state, has also been found. Evidence for other states is inconclusive.

Original languageEnglish
Article number065209
JournalPhysical Review C - Nuclear Physics
Volume80
Issue number6
DOIs
StatePublished - 30 Dec 2009

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