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Transverse polarization of Σ+(1189) in photoproduction on a hydrogen target in CLAS

  • C. S. Nepali
  • , M. Amaryan
  • , K. P. Adhikari
  • , M. Aghasyan
  • , S. Anefalos Pereira
  • , H. Baghdasaryan
  • , J. Ball
  • , M. Battaglieri
  • , V. Batourine
  • , I. Bedlinskiy
  • , A. S. Biselli
  • , J. Bono
  • , S. Boiarinov
  • , W. J. Briscoe
  • , S. Bültmann
  • , V. D. Burkert
  • , D. S. Carman
  • , A. Celentano
  • , S. Chandavar
  • , G. Charles
  • P. L. Cole, P. Collins, M. Contalbrigo, V. Crede, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, D. Doughty, R. Dupre, A. El Alaoui, L. El Fassi, G. Fedotov, S. Fegan, R. Fersch, J. A. Fleming, M. Y. Gabrielyan, N. Gevorgyan, K. L. Giovanetti, F. X. Girod, D. I. Glazier, J. T. Goetz, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, K. Hafidi, H. Hakobyan, C. Hanretty, N. Harrison, D. Heddle, K. Hicks, D. Ho, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, H. S. Jo, D. Keller, M. Khandaker, P. Khetarpal, A. Kim, W. Kim, A. Klein, F. J. Klein, S. Koirala, V. Kubarovsky, S. E. Kuhn, S. V. Kuleshov, N. D. Kvaltine, H. Y. Lu, I. J.D. Macgregor, N. Markov, M. Mayer, B. McKinnon, T. Mineeva, M. Mirazita, V. Mokeev, R. A. Montgomery, E. Munevar, C. Munoz Camacho, P. Nadel-Turonski, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, L. L. Pappalardo, R. Paremuzyan, K. Park, S. Park, E. Pasyuk, E. Phelps, J. J. Phillips, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, D. Protopopescu, A. J.R. Puckett, B. A. Raue, D. Rimal, M. Ripani, B. G. Ritchie, 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, S. Stepanyan, I. I. Strakovsky, S. Strauch, M. Taiuti, W. Tang, C. E. Taylor, Ye Tian, S. Tkachenko, B. Torayev, B. Vernarsky, A. V. Vlassov, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Watts, L. B. Weinstein, D. P. Weygand, N. Zachariou, L. Zana, J. Zhang, Z. W. Zhao, I. Zonta
  • Old Dominion University
  • National Institute for Nuclear Physics
  • University of Virginia
  • CEA Saclay
  • Kyungpook National University
  • Thomas Jefferson National Accelerator Facility
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Carnegie Mellon University
  • Fairfield University
  • Florida International University
  • George Washington University
  • Ohio University
  • Idaho State University
  • Catholic University of America
  • Florida State University
  • A. Alikhanian Yerevan Institute of Physics
  • University of South Carolina
  • Christopher Newport University
  • Institut de Physique Nucléaire Orsay
  • Argonne National Laboratory
  • Lomonosov Moscow State University
  • University of Glasgow
  • College of William and Mary
  • University of Edinburgh
  • James Madison University
  • University of Connecticut
  • Universidad Técnica Federico Santa Maria
  • University of New Hampshire
  • Norfolk State University
  • Rensselaer Polytechnic Institute
  • Arizona State University
  • California State University Dominguez Hills
  • University of Genoa
  • Université Joseph Fourier Grenoble 1

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Experimental results on the Σ+(1189) hyperon transverse polarization in photoproduction on a hydrogen target using the CLAS detector at Jefferson Laboratory are presented. The Σ+(1189) was reconstructed in the exclusive reaction γ+p→KS0+Σ +(1189) via the Σ+→pπ0 decay mode. The KS0 was reconstructed in the invariant mass of two oppositely charged pions with the π0 identified in the missing mass of the detected pπ+π - final state. Experimental data were collected in the photon energy range Eγ=1.0-3.5 GeV (√s range 1.66-2.73 GeV). We observe a large negative polarization of up to 95%. As the mechanism of transverse polarization of hyperons produced in unpolarized photoproduction experiments is still not well understood, these results will help to distinguish between different theoretical models on hyperon production and provide valuable information for the searches of missing baryon resonances.

Original languageEnglish
Article number045206
JournalPhysical Review C - Nuclear Physics
Volume87
Issue number4
DOIs
StatePublished - 19 Apr 2013

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