Mass spectra of the heavy baryons ΛQ and ΣQ(*) from QCD sum rules

被引：33
作者：
Zhang, Jian-Rong [1 ]
Huang, Ming-Qiu [1 ]
机构：
[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China
来源：
PHYSICAL REVIEW D | 2008年 / 77卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.77.094002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We use QCD sum rule approach to calculate the masses of the ground-state Lambda(Q) and Sigma(()(Q)*()) baryons. Contributions of the operators up to dimension six are included in operator product expansion. The resulting heavy baryonic masses from the calculations are m(Lambda b)=5.69 +/- 0.13 GeV, and m(Lambda c)=2.31 +/- 0.19 GeV for Lambda(Q); m(Sigma b)=5.73 +/- 0.21 GeV, m(Sigma b)*=5.81 +/- 0.19 GeV, m(Sigma c)=2.40 +/- 0.31 GeV and m(Sigma c)*=2.56 +/- 0.24 GeV for Sigma(()(Q)*()), respectively, which are in good agreement with the experimental values.
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页数：5
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