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Mesons in a Poincare Covariant Bethe-Salpeter Approach | | R. Alkofer
; P. Watson
; H. Weigel
; | | Date: |
6 Feb 2002 | | Journal: | Phys.Rev. D65 (2002) 094026 | | Subject: | hep-ph nucl-th | | Abstract: | We develop 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 consistently treat these integral equations by precisely implementing the quark propagator functions that solve the Schwinger-Dyson equations into the Bethe-Salpeter equations in the relevant kinematical region. 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. | | Source: | arXiv, hep-ph/0202053 | | Services: | Forum | Review | PDF | Favorites | |
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