PION LOOP CONTRIBUTION TO THE ELECTROMAGNETIC PION CHARGE RADIUS
- 20 September 1995
- journal article
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics A
- Vol. 10 (23) , 3319-3342
- https://doi.org/10.1142/s0217751x95001601
Abstract
A phenomenological Dyson-Schwinger equation approach to QCD, formalized in terms of a QCD-based model field theory, is used to calculate the electromagnetic charge radius of the pion. The contributions from the core of dressed quarks and the pion loop are identified and compared. It is shown explicitly that the divergence of the charge radius in the chiral limit is due to the pion loop but that at mπ=0.14 GeV this loop contributes less than 15% to , i.e. the dressed quark core is the dominant determining characteristic for the pion.Keywords
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