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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据