Probing Chiral Symmetry of Nucleons by Threshold ηπ Production

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  • Jido Daisuke
    Consejo Superior de Investigaciones Científicas, Universitat de Valencia, IFIC Institutos de Investigación de Peterna, Aptdo. Correos 2085, 46071, Valencia Spain
  • Oka Makoto
    Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
  • Hosaka Atsushi
    Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan

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タイトル別名
  • Probing Chiral Symmetry of Nucleons by Threshold .ETA..PI. Production.
  • Probing Chiral Symmetry of Nucleons by Threshold イータ パイ Production
  • Probing Chiral Symmetry of Nucleons by Threshold    Production

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Double meson production of eta and pi mesons in the threshold region is investigated in order to determine chiral properties of the nucleon. The eta can be used as a probe for the negative parity nucleon N* ≡ N*(1535), produced in the intermediate state. The coupling of the low energy pion in the final state is then used to extract the sign of the Yukawa coupling, gπN*N*, which distinguishes the two realizations of chiral symmetry, naive and mirror, for the nucleon.

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