Coupled-channel analysis of pion- and eta-electroproduction with the J\"ulich-Bonn-Washington model

Carlos Granados; Deborah R\"onchen; Helmut Haberzettl; Igor Strakovsky; Jackson Hergenrather; Maxim Mai; Michael D\"oring; Ron Workman; Ulf-G. Mei{\ss}ner

arxiv: 2111.04774 · v1 · pith:FLHR5EI7new · submitted 2021-11-08 · ⚛️ nucl-th · hep-ph· nucl-ex

Coupled-channel analysis of pion- and eta-electroproduction with the J\"ulich-Bonn-Washington model

Maxim Mai , Michael D\"oring , Carlos Granados , Helmut Haberzettl , Jackson Hergenrather , Ulf-G. Mei{\ss}ner , Deborah R\"onchen , Igor Strakovsky

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Ron Workman

This is my paper

classification ⚛️ nucl-th hep-phnucl-ex

keywords electroproductionenergyanalysiscoupled-channeldatafitsmodelpion

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Pion and eta electroproduction data are jointly analyzed for the first time, up to a center-of-mass energy of 1.6 GeV. The framework is a dynamical coupled-channel model, based on the recent J\"ulich-Bonn-Washington analysis of pion electroproduction data for the same energy range. Comparisons are made to a number of single-channel eta electroproduction fits. By comparing multipoles of comparable fit quality, we find some of these amplitudes are well determined over the near-threshold region, while others will require fits over an extended energy range.

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