Ground-state spectrum of light-quark mesons

被引:149
作者
Burden, CJ
Qian, L
Roberts, CD
Tandy, PC
Thomson, MJ
机构
[1] KENT STATE UNIV, DEPT PHYS, NUCL RES CTR, KENT, OH 44242 USA
[2] ARGONNE NATL LAB, DIV PHYS, ARGONNE, IL 60439 USA
[3] UNIV MELBOURNE, SCH PHYS, PARKVILLE, VIC 3052, AUSTRALIA
关键词
D O I
10.1103/PhysRevC.55.2649
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
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 an 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 Ansatze and the ladder kernel are highlighted.
引用
收藏
页码:2649 / 2664
页数:16
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