Partial Wave Analysis of the Reaction γp→pω and the Search for Nucleon Resonances

Authors

M. Williams
Gerard P. Gilfoyle, University of RichmondFollow
et. al.

DOI

10.1103/PhysRevC.80.065209

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 J ^P = 5/2⁺ state around 2 GeV, a “missing” state, has also been found. Evidence for other states is inconclusive.

Document Type

Article

Publication Date

12-30-2009

Publisher Statement

Copyright © 2009 American Physical Society. This article first appeared in Physical Review C 80, no. 6 (December 30, 2009): 065209: 1-18. doi:10.1103/PhysRevC.80.065209.

Please note that downloads of the article are for private/personal use only.

Recommended Citation

Williams, M., 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. 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, and B. Zhao. "Partial Wave Analysis of the Reaction γp→pω and the Search for Nucleon Resonances." Physical Review C 80, no. 6 (December 30, 2009): 065209: 1-18. doi:10.1103/PhysRevC.80.065209.