Journal Article

PreJuSER-28749

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The pion charge radius from charged pion electroproduction

Bernard, V.FZJ* ; Kaiser, N.FZJ* ; Meissner, U. G.FZJ*

2000
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/2376

Abstract: We analyze a low-energy theorem of threshold pion electroproduction which allows one to determine the charge radius of the pion. We show that at the same order where the radius appears, pion loops induce a correction to the momentum dependence of the longitudinal dipole amplitude L-0+((-)). This model-independent correction amounts to an increase of the pion charge radius squared from the electroproduction data by about 0.27 fm(2). It sheds light on the apparent discrepancy between the recent determination of the pion radius from electroproduction data and the one based on pion-electron scattering.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Kernphysik (IKP)

Research Program(s):

1. Theoretische Kernphysik (20.80.0)

Appears in the scientific report 2000
Notes: This version is available at the following Publisher URL: http://prc.aps.org

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