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arXiv · hep-ph/0307066

A Bethe--Salpeter Description of Light Mesons

H. Weigel·R. Alkofer·P. Watson
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Abstract

We present a covariant approach to describe the low--lying scalar, pseudoscalar, vector and axialvector mesons as quark--antiquark bound states.This approach is based on an effective interaction modeling of the non--perturbative structure of the gluon propagator that enters the quark Schwinger--Dyson and meson Bethe--Salpeter equations. We extract the meson masses and compute the pion and kaon decay constants. We obtain a quantitatively correct description for pions, kaons and vector mesons while the calculated spectra of scalar and axialvector mesons suggest that their structure is more complex than being quark--antiquark bound states.

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H. Weigel, R. Alkofer, P. Watson. 2003-07-04. A Bethe--Salpeter Description of Light Mesons. https://doi.org/10.1063/1.1632192

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