eta, eta-prime photoproduction and electroproduction off protons

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dc.creatorBorasoy, B.
dc.creatorMarco, E.
dc.creatorWetzel, S.
dc.date2004-02-27
dc.date.accessioned2026-07-07T03:52:10Z
dc.date.available2026-07-07T03:52:10Z
dc.descriptionPhoto- and electroproduction of eta, eta-prime mesons on protons are investigated within a relativistic chiral unitary approach based on coupled channels. The s wave potentials for electroproduction and meson-baryon scattering are derived from a chiral effective Lagrangian which includes the eta-prime as an explicit degree of freedom and incorporates important features of the underlying QCD Lagrangian such as the axial U(1) anomaly. The effective potentials are iterated in a Bethe-Salpeter equation and cross sections for eta, eta-prime photo- and electroproduction from protons are obtained. The results for the eta-prime photoproduction cross section reproduce the appearance of an S_(11) resonance around 1.9 GeV observed at ELSA. The inclusion of electromagnetic form factors increases the predicted eta electroproduction cross sections, providing a qualitative explanation for the hard form factor of the photocoupling amplitude observed at CLAS.
dc.descriptionPresented at the Hirschegg 2004 conference, Jan. 11-17
dc.identifierhttps://arxiv.org/abs/hep-ph/0402293
dc.identifierhttp://arxiv.org/abs/hep-ph/0402293
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/43367
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleeta, eta-prime photoproduction and electroproduction off protons
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