Journal Article

FZJ-2015-06729

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Eta photoproduction in a combined analysis of pion- and photon-induced reactions

Rönchen, D. (Corresponding author)FZJ* ; Döring, M. ; Haberzettl, H. ; Haidenbauer, J.FZJ* ; Meißner, U. -. ; Nakayama, K.

2015
Springer Berlin

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Please use a persistent id in citations: http://hdl.handle.net/2128/22794  doi:10.1140/epja/i2015-15070-7

Abstract: 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.

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Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. 531 - Condensed Matter and Molecular Building Blocks (POF3-531) (POF3-531)
3. Unified analysis of photon- and pion-induced reactions in the hadron exchange picture (jikp07_20110501) (jikp07_20110501)

Appears in the scientific report 2015

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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