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arXiv 2212.09003hep-ph
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一种在四体$Ξ_c^{0/+}$衰变角分布分析中寻找$Ξ_c^{0/+}$-$Ξ_c^{\n

A novel method for searching the $Ξ_c^{0/+}$-$Ξ_c^{\prime 0/+}$ mixing effect in the angular distribution analysis of a four-body $Ξ_c^{0/+}$ decay

Zhi Peng Xing, Yu ji Shi

AI总结:

本研究提出一种在四体$Ξ_c$衰变角分布分析中寻找$Ξ_c$-$Ξ_c^\prime$混合效应的新方法,预测了衰变分支比与前后不对称性,指出后者可区分共振态并确定混合角。

摘要:

在这项工作中,我们提出了一种在$Ξ_c\toΞ^{(\prime)}(Λπ)\ell^+ν$衰变的角分布分析中寻找$Ξ^{0+}_c$-$Ξ_c^{0+\prime}$混合效应的新方法,该混合效应可通过$Ξ^{\prime}$共振态的出现被观测到。借助这一角分布,我们预测了衰变分支比和前后不对称性。我们指出,作为$Ξ^{(\prime)}$不变质量平方与$Ξ^{0+}_c$-$Ξ_c^{0+\prime}$混合角$θ_c$的函数,前后不对称性可用于区分$Ξ^{(\prime)}$这两个共振态,甚至为确定精确的混合角提供了可能。

英文摘要:

In this work, we raised a novel method for searching the $Ξ^{0+}_c$-$Ξ_c^{0+\prime}$ mixing effect in an angular distribution analysis of the $Ξ_c\toΞ^{(\prime)}(Λπ)\ell^+ν$ decay, where the mixing effect can be observed by the appearance of the $Ξ^{\prime}$ resonant. Armed with this angular distribution, the decay branching fraction and the forward-backward asymmetry are predicted. We pointed out that the forward-backward asymmetry, as a function of the invariant mass square of $Ξ^{(\prime)}$ and the $Ξ^{0+}_c$-$Ξ_c^{0+\prime}$ mixing angle $θ_c$, can be used to distinguish the two resonants $Ξ^{(\prime)}$ and even provide a possibility to determine the exact mixing angle.

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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