Mesons with a light quark-antiquark pair and the Bethe-Salpeter equation
نویسنده
چکیده
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.
منابع مشابه
Quark-antiquark composite systems: the Bethe–Salpeter equation in the spectral-integration technique
The Bethe–Salpeter equations for the light-quark composite systems, qq̄, are written in terms of spectral integrals. For the qq̄-mesons characterized by the mass M , spin J and radial quantum number n, the equations are presented for the following (n,M2)trajectories: πJ , ηJ , aJ , fJ , ρJ , ωJ , hJ and bJ .
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