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arXiv 2404.09006hep-ph
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α_s展开下领头阶近似的正负宇称重重子QCD求和规则

QCD sum rules for positive and negative parity heavy baryons at next-to-leading order in $α_s$-expansion

Tetsuo Nishikawa, Yoshihiko Kondo, Yoshiko Kanada-En'yo

AI总结:

本研究构建重夸克极限下正负宇称重重子的QCD求和规则,纳入α_s展开次领头阶修正,发现修正可降低质量预测值、提升Borel参数稳定性,且手征奇凝聚态对负宇称态无贡献。

摘要:

本文构建了重夸克极限下正负宇称重重子的QCD求和规则,将该方法应用于Λ和Σ道。研究纳入了α_s展开的次领头阶修正,覆盖算符乘积展开中的0维与3维项。这些修正使预测质量显著降低,且大幅提升了关于Borel参数的稳定性,负宇称态的提升效果尤为明显。研究还发现,在重夸克极限下,手征奇凝聚态对负宇称态无贡献。

英文摘要:

QCD sum rules for positive and negative parity heavy baryons in the heavy quark limit are formulated. We apply the method to $Λ$ and $Σ$ channels. We include the next-to-leading order corrections in $α_s$-expansion to dimension 0 and 3 terms in the operator product expansion. The corrections lead to the considerable reduction of the predicted masses and significantly improves the stability with respect to the Borel parameter, especially for negative parity states. It is also found that in the heavy quark limit chiral odd condensates do not contribute to the negative parity states.

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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