%0 Journal Article
%A Rönchen, D.
%A Döring, M.
%A Haberzettl, H.
%A Haidenbauer, J.
%A Meißner, U. -G.
%A Nakayama, K.
%T Eta photoproduction in a combined analysis of pion- and photon-induced reactions
%J The European physical journal / A
%V 51
%N 6
%@ 1434-601X
%C Berlin
%I Springer
%M FZJ-2015-06729
%P 70
%D 2015
%X The ηN final state is isospin-selective and thus provides access to the spectrum of excited nucleons without being affected by excited Δ states. To this end, the world database on eta photoproduction off the proton up to a center-of-mass energy of E ∼ 2.3 GeV is analyzed, including data on differential cross sections, and single- and double-polarization observables. The resonance spectrum and its properties are determined in a combined analysis of eta and pion photoproduction off the proton together with the reactions πN → πN, ηN, KΛ and KΣ. For the analysis, the so-called Jülich coupled-channel framework is used, incorporating unitarity, analyticity, and effective three-body channels. Parameters tied to photoproduction and hadronic interactions are varied simultaneously. The influence of recent MAMI T and F asymmetry data on the eta photoproduction amplitude is discussed in detail.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000356779000001
%R 10.1140/epja/i2015-15070-7
%U https://juser.fz-juelich.de/record/276266