A New Candidate for Non-Strangeness Pentaquarks : N^*(1675)

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Author(s)

Abstract

We study a new nucleon resonance from η photoproduction, which was observed at √<s>=1675 MeV with a narrow decay width (~10 MeV) by the Tohoku LNS group as well as the GRAAL collaboration. Using an effective Lagrangian approach, we compute differential cross sections for the η photoproduction. In addition to N^*(1675, 1/2^±, 3/2^±), we employ six other nucleon resonances, i.e. N^*(1520, 1535, 1650, 1675, 1710, 1720) and vector meson exchanges which are the most relevant ones to this reaction process. As a result, we can reproduce the GRAAL data qualitatively well and observe obvious isospin asymmetry between the transition magnetic moments of N^*(1675) : μ_<γnn^*>≫μ_<γpp^*>, which indicates that the newly found nucleon resonance may be identified as a non-strange pentaquark state.

Journal

  • Progress of Theoretical Physics

    Progress of Theoretical Physics (168), 97-100, 2007-11-09

    Progress of Theoretical Physics

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Codes

  • NII Article ID (NAID)
    110006473393
  • NII NACSIS-CAT ID (NCID)
    AA00791466
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    03759687
  • NDL Article ID
    8984652
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A468
  • Data Source
    CJP  NDL  NII-ELS  NDL-Digital 
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