Octet and decuplet baryons in a covariant and confining diquark-quark model

被引：119

作者：

Oettel, M ^{[1
]}

Hellstern, G ^{[1
]}

Alkofer, R ^{[1
]}

Reinhardt, H ^{[1
]}

机构：

[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany

来源：

PHYSICAL REVIEW C | 1998年 / 58卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.58.2459

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：

The baryon octet and decuplet masses and Bethe-Salpeter vertex and wave functions are calculated in the ladder approximation to the quark exchange between a scalar or axialvector diquark and a constituent quark. These functions reflecting full Lorentz covariance are given in terms of an expansion in Gegenbauer polynomials. In the rest frame of the baryon, a complete partial wave decomposition of the Bethe-Salpeter wave function is performed. The confinement of quarks and diquarks is implemented via a parametrization of the corresponding propagators. We also discuss some aspects of the momentum routing in the ladder approximation to the Bethe-Salpeter equation. Numerical results for the octet and decuplet masses with broken flavor SU(3) in the conserved isospin limit are presented. [S0556-2813(98)00810-3].

引用

页码：2459 / 2477

页数：19

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