Low-energy electromagnetic characteristics of the π-meson in the covariant three-dimensional approach
N. V. Maksimenko, O. M. Deryuzhkova
Abstract
The inverse time ordered Green's function is defined in a covariant three-dimensional formalism using the diagram approach.The equation of motion of a two-quark composite system in an external electromagnetic field up to the second order in the field strength is obtained. The polarizability of the π-meson is calculated using this formalism. The mean square radius of the two-quark system is calculated from the wave functions of the system. In addition, radiative corrections are calculated for both the polarizability and the mean square radius.
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