Interference phenomena in the $J^P=1/2^-$-wave in $\eta$ photoproduction

A. V. Anisovich; E. Klempt; B. Krusche; V. A. Nikonov; A. V. Sarantsev; U. Thoma; D. Werthmüller

Interference phenomena in the $J^P=1/2^-$-wave in $\eta$ photoproduction

Nuclear Experiment 2015-06-02 v2

Authors: A. V. Anisovich , E. Klempt , B. Krusche , V. A. Nikonov , A. V. Sarantsev , U. Thoma , D. Werthmüller

Abstract

The recent precise experimental results for the photoproduction of $\eta$ -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 $\gamma n \rightarrow n\eta$ 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

eta photoproduction neutron target Bonn-Gatchina coupled channel model partial wave analysis interference pattern excitation function narrow resonance

Cite

@article{arxiv.1501.02093,
  title  = {Interference phenomena in the $J^P=1/2^-$-wave in $\eta$ photoproduction},
  author = {A. V. Anisovich and E. Klempt and B. Krusche and V. A. Nikonov and A. V. Sarantsev and U. Thoma and D. Werthmüller},
  journal= {arXiv preprint arXiv:1501.02093},
  year   = {2015}
}

Comments

10 pages, 13 figures, accepted for publication in EPJA

Interference phenomena in the $J^P=1/2^-$-wave in $\eta$ photoproduction

Abstract

Keywords

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