QCD sum rules study of Ξc and Ξb baryons

被引：41

作者：

Duraes, Francisco O. ^{[2
]}

Nielsen, Marina ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, SP, Brazil

[2] Univ Presbiteriana Mackenzie, Ctr Ciencias & Humanidades, BR-01302907 Sao Paulo, SP, Brazil

来源：

PHYSICS LETTERS B | 2007年 / 658卷 / 1-3期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1016/j.physletb.2007.10.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use QCD sum rules to study the masses of the baryons Xi(c) and Xi(b). We work with a current where the strange and the light quarks are in a relative spin zero, at leading order in alpha(s). We consider the contributions of condensates up to dimension six. For Xi(b) we get m(Xi b) = (5.75 +/- 0.25) GeV, and for Xi(c) we get m(Xi c) (2.5 +/- 0.2) GeV, both in excellent agreement with the experimental values. We also make predictions to the state Omega(b) (ssb) obtaining m(Omega b) = (5.82 +/- 0.23) GeV. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：40 / 44

页数：5

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