Ground-state spectrum of light-quark mesons

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.55.2649· OSTI ID:496887

Burden, C J ^[1]; Qian, L; Tandy, P C ^[2]; Roberts, C D ^[3]; Thomson, M J ^[4]

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1. Department of Theoretical Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200 (Australia)
2. Center for Nuclear Research, Department of Physics, Kent State University, Kent, Ohio 44242 (United States)
3. Physics Division, Bldg. 203, Argonne National Laboratory, Argonne, Illinois 60439-4843 (United States)
4. 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, Journal Name: Physical Review, C Journal Issue: 5 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BETHE-SALPETER EQUATION
CONFINEMENT
FLAVOR
GOLDSTONE BOSONS
GROUND STATES
LADDER APPROXIMATION
MASS FORMULAE
MESONS
PROPAGATOR
PSEUDOSCALAR MESONS
QUARKS
SPECTRA
TWO-BODY PROBLEM