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arXiv 1001.1652hep-ph
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用QCD求和规则分析${1\over 2}^{\pm}$味反三重态重子

Analysis of the ${1\over 2}^{\pm}$ flavor antitriplet heavy baryon states with QCD sum rules

Zhi-Gang Wang

摘要:

本文利用QCD求和规则,通过减去相应${1\over 2}^\mp$重子态的贡献,研究了${1\over 2}^\pm$味反三重态重子态($Λ_c^+$,$Ξ_c^+,Ξ_c^0)$和($Λ_b^0$,$Ξ_b^0,Ξ_b^-)$)的质量和极残基,观察到质量与实验数据符合较好,并对未观测到的${1\over 2}^-$底重子态进行了合理的预言.一旦得到了合理的极留数$λ_Λ$和$λ_Ξ$的值,我们就可以把它们作为基本参数,用QCD求和规则研究相应的强子过程。

英文摘要:

In this article, we study the masses and pole residues of the ${1\over 2}^\pm$ flavor antitriplet heavy baryon states ($Λ_c^+$, $Ξ_c^+,Ξ_c^0)$ and ($Λ_b^0$, $Ξ_b^0,Ξ_b^-)$ by subtracting the contributions from the corresponding ${1\over 2}^\mp$ heavy baryon states with the QCD sum rules, and observe the masses are in good agreement with the experimental data and make reasonable predictions for the unobserved ${1\over 2}^-$ bottom baryon states. Once reasonable values of the pole residues $λ_Λ$ and $λ_Ξ$ are obtained, we can take them as basic parameters to study the revelent hadronic processes with the QCD sum rules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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