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Branching ratio of the electromagnetic decay of the Σ +(1385)

  • D. Keller
  • , K. Hicks
  • , K. P. Adhikari
  • , D. Adikaram
  • , M. J. Amaryan
  • , M. Anghinolfi
  • , H. Baghdasaryan
  • , J. Ball
  • , M. Battaglieri
  • , I. Bedlinskiy
  • , A. S. Biselli
  • , C. Bookwalter
  • , S. Boiarinov
  • , D. Branford
  • , W. J. Briscoe
  • , W. K. Brooks
  • , V. D. Burkert
  • , D. S. Carman
  • , A. Celentano
  • , S. Chandavar
  • P. L. Cole, M. Contalbrigo, V. Crede, A. D'Angelo, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, C. Djalali, D. Doughty, R. Dupre, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, M. Y. Gabrielyan, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, W. Gohn, E. Golovatch, R. W. Gothe, L. Graham, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, K. Hafidi, H. Hakobyan, M. Holtrop, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, H. S. Jo, K. Joo, M. Khandaker, P. Khetarpal, A. Kim, W. Kim, F. J. Klein, A. Kubarovsky, V. Kubarovsky, S. V. Kuleshov, H. Y. Lu, I. J.D. MacGregor, Y. Mao, N. Markov, M. Mayer, B. McKinnon, C. A. Meyer, T. Mineeva, M. Mirazita, V. Mokeev, H. Moutarde, E. Munevar, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, M. Paolone, L. Pappalardo, R. Paremuzyan, K. Park, S. Park, E. Pasyuk, S. Anefalos Pereira, S. Pisano, O. Pogorelko, S. Pozdniakov, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, D. Rimal, M. Ripani, B. G. Ritchie, G. Rosner, P. Rossi, F. Sabatié, M. S. Saini, C. Salgado, D. Schott, R. A. Schumacher, H. Seraydaryan, Y. G. Sharabian, E. S. Smith, G. D. Smith, D. I. Sober, D. Sokhan, S. S. Stepanyan, S. Stepanyan, P. Stoler, S. Strauch, M. Taiuti, W. Tang, C. E. Taylor, S. Tkachenko, B. Vernarsky, M. F. Vineyard, A. V. Vlassov, H. Voskanyan, E. Voutier, D. P. Watts, M. H. Wood, N. Zachariou, L. Zana, B. Zhao, Z. W. Zhao
  • Ohio University
  • Old Dominion University
  • National Institute for Nuclear Physics
  • University of Virginia
  • CEA Saclay
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Carnegie Mellon University
  • Fairfield University
  • Florida State University
  • Thomas Jefferson National Accelerator Facility
  • University of Edinburgh
  • George Washington University
  • Universidad Técnica Federico Santa Maria
  • Idaho State University
  • University of Rome Tor Vergata
  • A. Alikhanian Yerevan Institute of Physics
  • University of South Carolina
  • Christopher Newport University
  • Argonne National Laboratory
  • Florida International University
  • University of Richmond
  • James Madison University
  • University of Connecticut
  • Lomonosov Moscow State University
  • College of William and Mary
  • Institut de Physique Nucléaire Orsay
  • Los Alamos National Laboratory
  • University of New Hampshire
  • University of Glasgow
  • Norfolk State University
  • Kyungpook National University
  • Catholic University of America
  • Rensselaer Polytechnic Institute
  • Arizona State University
  • University of Genoa
  • Union College
  • Université Joseph Fourier Grenoble 1
  • Canisius College

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the Σ *+(1385) from the reaction γp→K0Σ *+(1385). A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid-hydrogen target, resulting in the photoproduction of the kaon and Σ * hyperon. Kinematic fitting was used to separate the reaction channel from the background processes. The fitting algorithm exploited a new method to kinematically fit neutrons in the CLAS detector, leading to the measured decay widths ratio Σ +(1385)→Σ +γ/Σ +(1385)→Σ +π0=11. 95±2.21(stat)-1.21+0.53(sys)% and a deduced partial width of 250.0±56.9(stat)-41.2+34.3(sys)keV. A U-spin symmetry test using the SU(3) flavor-multiplet representation yields predictions for the Σ *+(1385)→Σ +γ and Σ *0(1385)→Λγ partial widths that agree with the experimental measurements.

Original languageEnglish
Article number052004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number5
DOIs
StatePublished - 19 Mar 2012

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