Excited baryon phenomenology from large-Nc QCD

被引：93

作者：

Pirjol, D ^{[1
]}

Yan, TM ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Ctr Theoret Sci, Dept Phys, Hsinchu 30043, Taiwan

来源：

PHYSICAL REVIEW D | 1998年 / 57卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.57.5434

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a phenomenological analysis of the strong couplings of the negative-parity L=1 baryons from the perspective of the large-N-c expansion. In the large-N-c limit the mass spectrum and mixing pattern of these states are constrained in a very specific way. The mixing angles are completely determined in this limit, with predictions in good agreement with experiment. In the combined large-N-c and SU(3) limits the pion couplings of the five negative-parity octets to the pound state baryons are given in terms of only 3 independent couplings. The large-N-c predictions for the ratios of strong couplings are tested against experimental data.

引用

页码：5434 / 5443

页数：10

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