TY  - JOUR
AU  - Rönchen, D.
AU  - Döring, M.
AU  - Haberzettl, H.
AU  - Haidenbauer, J.
AU  - Meißner, U. -G.
AU  - Nakayama, K.
TI  - Eta photoproduction in a combined analysis of pion- and photon-induced reactions
JO  - The European physical journal / A
VL  - 51
IS  - 6
SN  - 1434-601X
CY  - Berlin
PB  - Springer
M1  - FZJ-2015-06729
SP  - 70
PY  - 2015
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000356779000001
DO  - DOI:10.1140/epja/i2015-15070-7
UR  - https://juser.fz-juelich.de/record/276266
ER  -