Λs(1405) and negative parity baryon states

被引：11

作者：

Pakvasa, S ^{[1
]}

Tuan, SF ^{[1
]}

机构：

[1] Univ Hawaii Manoa, Dept Phys, Honolulu, HI 96822 USA

来源：

PHYSICS LETTERS B | 1999年 / 459卷 / 1-3期

关键词：

negative parity; baryons; HQET;

D O I：

10.1016/S0370-2693(99)00622-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

After a brief historical background on the Lambda(s)(1405), we revisit the 25 year old controversy on whether Lambda(s)(1405) is a qqq (L = 1) three quark state or a (K) over bar N quasi virtual bound state. This work is stimulated by the recent suggestion of Isgur that s be treated as a heavy quark in heavy quark effective theory HQET. We re-examine the empirical evidence for minimal mixing amongst singlets and octets in negative parity baryon states, with a possible dynamical origin in the opening of inelastic threshold channels. Finally, we suggest that Lambda(s)(1405) belongs to a class of hadrons which are described simultaneously as qqq or q (q) over bar states and as hadronic bound states. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：301 / 305

页数：5

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