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Photoproduction of η -mesons on the deuteron above S11(1535) in the presence of a narrow P11(1670) -resonance

  • Regular Article - Hadron Physics
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Abstract.

Incoherent photoproduction of η -mesons on the deuteron is considered. The main attention is paid to the region above the S 11(1535) -resonance where a rather narrow resonance-like structure in the total cross-section extracted for γn → ηn has been reported. The corresponding experimental results are analyzed from the phenomenological standpoint within the model containing a baryon P11 with a mass of about 1670MeV and a width less than 30MeV. This resonance was suggested in some recent works as a nonstrange member of the pentaquark antidecuplet with J P = 1/2+ . The calculation is also performed for the polarized and unpolarized angular distributions of η -mesons. In addition, we present our predictions for the cross-sections of the neutral kaons and double pion photoproduction, where the same narrow P 11(1670) -resonance is assumed to contribute through the decay into K 0Λ and πΔ configuration.

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Authors and Affiliations

  1. Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099, Mainz, Germany

    A. Fix & L. Tiator

  2. Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780, Bochum, Germany

    M. V. Polyakov

Authors
  1. A. Fix
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  2. L. Tiator
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  3. M. V. Polyakov
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Correspondence to A. Fix.

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V. Vento

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Fix, A., Tiator, L. & Polyakov, M.V. Photoproduction of η -mesons on the deuteron above S11(1535) in the presence of a narrow P11(1670) -resonance. Eur. Phys. J. A 32, 311–319 (2007). https://doi.org/10.1140/epja/i2007-10385-6

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  • DOI: https://doi.org/10.1140/epja/i2007-10385-6

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