MESON BOUND-STATES IN AN SU(N) SCALAR MODEL

被引：0
|
作者：
CHO, P
机构：
[1] Lyman Laboratory of Physics, Harvard University, Cambridge
来源：
NUCLEAR PHYSICS B | 1992年 / 369卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0550-3213(92)90385-O
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
A four-dimensional SU(N) model of scalar "quarks", "antiquarks", and "gluons" whose large-N structure closely resembles that of two-dimensional planar QCD is presented. The dominant self-energy and ladder diagrams in this model are summed to leading order in 1/N. The Schwinger-Dyson equation for the "quark" propagator is solved for the propagator's spectral representation. The mass spectrum for "quark-antiquark" mesons is then numerically calculated from the Bethe-Salpeter equation. The large-N results are compared with bound state predictions from lowest-order perturbation theory and the Schrodinger equation in the nonrelativistic limit. The nonperturbative and perturbative spectra are found to differ significantly in the strongly interacting sector of the model.
引用
收藏
页码：235 / 258
页数：24
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