Interference phenomena in the JP = 1/2 wave in η photoproduction

  • A. V. Anisovich
  • E. Klempt
  • B. Krusche
  • V. A. Nikonov
  • A. V. Sarantsev
  • U. Thoma
  • D. Werthmüller
Regular Article - Experimental Physics

Abstract

The recent precise experimental results for the photoproduction of η-mesons off the neutron measured with the Crystal Ball/TAPS calorimeter at the MAMI accelerator have been investigated in detail in the framework of the Bonn-Gatchina coupled-channel model. The main result is that the narrow structure observed in the excitation function of γη can be reproduced fully with a particular interference pattern in the J P = 1/2 partial wave. Introduction of the narrow resonance N(1685) with the properties reported in earlier publications deteriorates the quality of the fit.

Keywords

Angular Distribution Total Cross Section Partial Wave Excitation Function Helicity Amplitude 

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • A. V. Anisovich
    • 1
    • 2
  • E. Klempt
    • 1
  • B. Krusche
    • 3
  • V. A. Nikonov
    • 1
    • 2
  • A. V. Sarantsev
    • 1
    • 2
  • U. Thoma
    • 1
  • D. Werthmüller
    • 3
  1. 1.Helmholtz-Institut für Strahlen- und KernphysikUniversität BonnBonnGermany
  2. 2.Petersburg Nuclear Physics InstituteGatchinaRussia
  3. 3.Departement für PhysikUniversität BaselBaselSwitzerland

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