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Search for the photoexcitation of exotic mesons in the π+π+π- system

  • M. Nozar
  • , C. Salgado
  • , D. P. Weygand
  • , L. Guo
  • , G. Adams
  • , Ji Li
  • , P. Eugenio
  • , M. J. Amaryan
  • , M. Anghinolfi
  • , G. Asryan
  • , H. Avakian
  • , H. Bagdasaryan
  • , N. Baillie
  • , J. P. Ball
  • , N. A. Baltzell
  • , S. Barrow
  • , M. Battaglieri
  • , I. Bedlinskiy
  • , M. Bektasoglu
  • , M. Bellis
  • N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, 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, B. Carnahan, L. Casey, A. Cazes, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, 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, K. V. Dharmawardane, K. S. Dhuga, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, R. Fatemi, G. Fedotov, R. J. Feuerbach, T. A. Forest, A. Fradi, H. Funsten, M. Garçon, G. Gavalian, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, R. W. Gothe, K. A. Griffioen, M. Guidal, M. Guillo, N. Guler, V. Gyurjyan, C. Hadjidakis, K. Hafidi, H. 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, K. Joo, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, 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, K. Livingston, H. Y. Lu, M. MacCormick, N. Markov, P. Mattione, S. McAleer, B. McKinnon, J. W.C. McNabb, B. A. Mecking, S. Mehrabyan, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, 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, G. V. O'Rielly, M. Osipenko, A. I. Ostrovidov, K. 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, P. D. Rubin, F. Sabatié, J. Salamanca, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, A. V. Skabelin, E. S. Smith, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, U. Thoma, A. Tkabladze, S. Tkachenko, L. Todor, M. Ungaro, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, B. Zhao, Z. W. Zhao
  • Thomas Jefferson National Accelerator Facility
  • Los Alamos National Laboratory
  • Florida State University
  • Old Dominion University
  • National Institute for Nuclear Physics
  • A. Alikhanian Yerevan Institute of Physics
  • College of William and Mary
  • Arizona State University
  • University of South Carolina
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Ohio University
  • Carnegie Mellon University
  • George Washington University
  • Rensselaer Polytechnic Institute
  • Fairfield University
  • Rice University
  • Institut de Physique Nucléaire Orsay
  • University of Edinburgh
  • Universidad Técnica Federico Santa Maria
  • University of New Hampshire
  • Catholic University of America
  • Idaho State University
  • University of Virginia
  • CEA Saclay
  • University of Pittsburgh
  • Christopher Newport University
  • Argonne National Laboratory
  • Lomonosov Moscow State University
  • University of Richmond
  • James Madison University
  • University of California at Los Angeles
  • University of Glasgow
  • Virginia Polytechnic Institute and State University
  • University of Connecticut
  • Norfolk State University
  • Kyungpook National University
  • Florida International University
  • University of Massachusetts
  • California State University Dominguez Hills
  • Massachusetts Institute of Technology
  • Justus Liebig University Giessen
  • Union College

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

A search for exotic mesons in the π+π+π- system photoproduced by the charge exchange reaction γp→π+π+π-(n) was carried out by the CLAS Collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4GeV range, produced through bremsstrahlung from a 5.744GeV electron beam, was incident on a liquid-hydrogen target. A partial wave analysis was performed on a sample of 83000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic JPC=1-+ resonant state in the 1 to 2GeV mass range. Our partial wave analysis shows production of the a2(1320) and the π2(1670) mesons, but no evidence for the a1(1260), nor the π1(1600) exotic state at the expected levels. An upper limit of 13.5nb is determined for the exotic π1(1600) cross section, less than 2% of the a2(1320) production.

Original languageEnglish
Article number102002
JournalPhysical Review Letters
Volume102
Issue number10
DOIs
StatePublished - 9 Mar 2009

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