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arXiv 2108.01378hep-ph
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半轻子$Ξ_c$重子在光锥QCD求和规则中的衰变

Semileptonic $Ξ_c$ baryon decays in the light cone QCD sum rules

T. M. Aliev, S. Bilmis, M. Savci

摘要:

利用光锥QCD求和规则计算了弱$Ξ_c \to Ξ(Λ)$跃迁的形状因子。通过考虑不同洛伦兹结构下求和规则的组合,消除了负宇称$Ξ_c^*$重子贡献的污染。在得到形状因子后,还计算了$Ξ_c \to Ξ(Λ) \ell ν$衰变的分支比,并将我们的预测结果与其他方法的结果以及BELLE和ALICE合作组的测量结果进行了比较.

英文摘要:

Form factors of the weak $Ξ_c \to Ξ(Λ)$ transitions are calculated within the light cone QCD sum rules. The pollutions coming from the contribution of the negative parity $Ξ_c^*$ baryon is eliminated by considering the combinations of sum rules corresponding to the different Lorentz structures. Having obtained the form factors, the branching ratios of the $Ξ_c \to Ξ(Λ) \ell ν$ decays are also calculated, and our predictions are compared with the results of other approaches as well as the measurements done by BELLE and ALICE Collaborations.

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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