Photo- and electroproduction of mesons in a gauge-invariant framework

H. Haberzbttl, C. Bennhold, Terry Mart

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


A comprehensive formalism is presented to describe the photo- or electroproduction of mesons off the nucleon. Taking the hadrons as extended objects described by form factors, we discuss the issues of gauge invariance and of off-shell form factors (both hadronic and electromagnetic). Specifically, we show how the gauge invariance of the production current is preserved by introducing auxiliary currents which take the place of the exchange currents usually neglected entirely in practical applications. The relation of the present formulation to tree-level-type prescriptions is discussed. Applications to kaon photoproduction are shown.

Original languageEnglish
Pages (from-to)2387-2394
Number of pages8
JournalActa Physica Polonica B
Issue number10-11
Publication statusPublished - 2000


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