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Mesons with a Light Quark-Antiquark Pair and the Bethe-Salpeter Equation

Dean Lee
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Abstract

The light quark-antiquark scattering Green's function is considered near a meson resonance peak. The Bethe-Salpeter equation is used to write formal expressions for the resonance width/mass ratio. Arguments are made concerning to what extent this ratio can be calculated perturbatively, and an upper bound is placed on the growth of this ratio as a function of radial excitation. Certain mesons and their radial excitations are considered, as well as the more general issue of classifying mesons in the quark model.

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Dean Lee. 1994-09-24. Mesons with a Light Quark-Antiquark Pair and the Bethe-Salpeter Equation. https://arxiv.org/abs/hep-ph/9409403

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