Chiral unitary approach to the πN*N*, ηN*N* couplings for the N* (1535) resonance

被引：62
|
作者：
Nacher, JC [1 ]
Parreño, A
Oset, E
Ramos, A
Hosaka, A
Oka, M
机构：
[1] Osaka Univ, Nucl Phys Res Ctr, Ibaraki, Osaka 5670047, Japan
[2] Univ Valencia, Ctr Mixto, CSIC, Dept Fis Teor, E-46100 Burjassot, Spain
[3] Univ Valencia, Ctr Mixto, CSIC, IFIC, E-46100 Burjassot, Spain
[4] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA
[5] Univ Barcelona, Dept Estructura & Constituents Mat, Barcelona 08028, Spain
[6] Numazu Coll Technol, Numazu 4108501, Japan
[7] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
来源：
NUCLEAR PHYSICS A | 2000年 / 678卷 / 1-2期
关键词：
D O I：
10.1016/S0375-9474(00)00311-0
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：
Using a chiral unitary model in which the negative parity nucleon resonance N* = N*(1535) is generated dynamically by means of the Bethe-Salpeter equation with coupled meson-baryon channels in the S = 0 sector, we have obtained the pi(0)N*N* and eta N*N* couplings. The eta(0)N*N* coupling has smaller strength hut the same sign as the eta(0)NN coupling. This rules out the mirror assignment of chiral symmetry where the ground state nucleon N and the negative parity resonance N* are envisaged as chiral partners in the baryon scoter. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：187 / 211
页数：25
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