A Bethe-Salpeter Description of Light Mesons
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.
- Publication:
-
Scalar Mesons: An Interesting Puzzle for QCD
- Pub Date:
- November 2003
- DOI:
- 10.1063/1.1632192
- arXiv:
- arXiv:hep-ph/0307066
- Bibcode:
- 2003AIPC..688...33W
- Keywords:
-
- 14.40.Cs;
- 14.40.Aq;
- 12.38.Aw;
- 11.10.St;
- Other mesons with S=C=0 mass<
- 2.5 GeV;
- pi K and eta mesons;
- General properties of QCD;
- Bound and unstable states;
- Bethe-Salpeter equations;
- High Energy Physics - Phenomenology
- E-Print:
- Talk presented by HW at the international Scalar Meson Workshop, Utica, NY, May 2003