Ground-state spectrum of light-quark mesons
- Department of Theoretical Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200 (Australia)
- Center for Nuclear Research, Department of Physics, Kent State University, Kent, Ohio 44242 (United States)
- Physics Division, Bldg. 203, Argonne National Laboratory, Argonne, Illinois 60439-4843 (United States)
- School of Physics, University of Melbourne, Parkville VIC 3052 (Australia)
A confining, Goldstone theorem preserving, separable ansatz for the ladder kernel of the two-body Bethe-Salpeter equation is constructed from phenomenologically efficacious u, d, and s dressed-quark propagators. The simplicity of the approach is its merit. It provides a good description of the ground-state flavor-octet pseudoscalar, vector, and axial-vector meson spectrum facilitates an exploration of the relative importance of various components of the two-body Bethe-Salpeter amplitudes, showing that subleading Dirac components are quantitatively important in the flavor-octet pseudoscalar meson channels, and allows a scrutiny of the domain of applicability of ladder truncation studies. A color-antitriplet diquark spectrum is obtained. The shortcomings of separable {ital Ans{umlt a}tze} and the ladder kernel are highlighted. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 496887
- Journal Information:
- Physical Review, C, Vol. 55, Issue 5; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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