Threshold pion electroproduction in chiral perturbation theory

V. Bernard, N. Kaiser, T. S.H. Lee, Ulf G. Meißner

Research output: Contribution to journalReview articlepeer-review

72 Scopus citations


Electroproduction of pions on the nucleon near the threshold is analyzed within the framework of baryon chiral perturbation theory. We give a thorough discussion of the low-energy theorems related to charged and neutral electropionproduction. It is shown how the axial radius of the nucleon can be related to the S-wave multipoles E0+(-) and L0+(-). The chiral perturbation theory calculations of the γ{black star}p → π0p reaction are found to be in good agreement with the recent near threshold data. We also discuss the influence of some isospin-breaking effects in this channel. For future experimental tests of the underlying chiral dynamics, extensive predictions of differential cross sections and multipole amplitudes are presented.

Original languageEnglish
Pages (from-to)315-363
Number of pages49
JournalPhysics Reports
Issue number6
StatePublished - Oct 1994


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