Journal
PHYSICAL REVIEW C
Volume 61, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.61.045202
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The rainbow truncation of the quark Dyson-Schwinger equation is combined with the ladder Bethe-Salpeter equation for the dressed quark-photon vertex: to study the low-momentum behavior of the pion electromagnetic form factor. With model gluon parameters previously fixed by the pion mass and decay constant, the pion charge radius r(pi) is found to be in good agreement with the data. In this work, about half of r(pi)(2) is seen to be attributable to the presence of the rho pole in the solution of the ladder Bethe-Salpeter equation.
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