Journal Article

PreJuSER-55152

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Gauge-invariant approach to meson photoproduction including the final-state interaction

Haberzettl, H. ; Nakayama, K. ; Krewald, S.FZJ*

2006
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/10577  doi:10.1103/PhysRevC.74.045202

Abstract: A fully gauge-invariant (pseudoscalar) meson photoproduction amplitude off a nucleon including the final-state interaction is derived. The approach based on a comprehensive field-theoretical formalism developed earlier by one of the authors replaces certain dynamical features of the full interaction current by phenomenological auxiliary contact currents. A procedure is outlined that allows for a systematic improvement of this approximation. The feasibility of the approach is illustrated by applying it to both the neutral and charged pion photoproductions.

Keyword(s): photon nucleus: nuclear reaction ; photon nucleon: interaction ; pi0: photoproduction ; amplitude analysis ; invariance: gauge ; final-state interaction ; current ; channel cross section: energy dependence ; differential cross section: angular dependence ; Ward-Takahashi identity ; numerical calculations: interpretation of experiments

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut 3 (Theoretische Kernphysik) (IKP-TH)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2006

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