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The Bethe-Salpeter equation and leptonic decay constants for pseudoscalar andvector quark-antiquark mesons with arbitrary quark masses are studied inCoulomb gauge, under a leading order truncation. As input, we use a pure linearrising potential, supplemented by a contact term arising from the conservationof total color charge. It is shown how the equations can be written in terms ofmanifestly finite functions, despite the infrared singular interaction. Theresulting equations are solved numerically. Both the pattern of dynamicalchiral symmetry breaking and the leading order heavy quark limit are visible.

Bethe-Salpeter equation at leading order in Coulomb gauge