Quark mass dependence of s-wave baryon resonances

被引：203
作者：
García-Recio, C
Lutz, MFM
Nieves, J
机构：
[1] Univ Granada, Dept Fis Moderna, E-18071 Granada, Spain
[2] GSI, Gesell Schwerionenforsch, D-64291 Darmstadt, Germany
来源：
PHYSICS LETTERS B | 2004年 / 582卷 / 1-2期
关键词：
D O I：
10.1016/j.physletb.2003.11.073
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the quark mass dependence of J(P) = 1/2(-) s-wave baryon resonances. Parameter free results are obtained in terms of the leading order chiral Lagrangian. In the 'heavy' SU(3) limit with m(pi) = M-K similar or equal to 500 MeV the resonances turn into bound states forming two octets plus a singlet representations of the SU(3) group. A contrasted result is obtained in the 'light' SU(3) limit with m(pi) = m(K) similar or equal to 140 MeV for which no resonances exist. Using physical quark masses our analysis suggests to assign to the S = -2 resonances Xi(1690) and Xi(1620) the quantum numbers J(P) = 1/2(-). (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：49 / 54
页数：6
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