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In this Letter, we investigate the under-structures of the π and B mesons in the framework of the Bethe-Salpeter equation with the confining effective potential (infrared modified flat bottom potential). In bare quark-gluon vertex approximation, we obtain the algebraic expressions for the solutions of the coupled rainbow Schwinger-Dyson equation and ladder Bethe-Salpeter equation. Firstly, we neglect...
In this Letter, we calculate the dressed quark propagator with the flat bottom potential in the framework of the rainbow Schwinger-Dyson equation. Then based on the nonperturbative dressed quark propagator, we calculate the π decay constant and the quark condensate. The π decay constant is an important parameter in describing the interplay between dynamical symmetry breaking and confinement, while...
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