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arXiv 1912.01435hep-ph
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光阵面夸克模型中$Ξ_{cc}\toΞ_c$和$Ξ_{cc}\toΞ'_c$弱衰变的研究

Study on $Ξ_{cc}\toΞ_c$ and $Ξ_{cc}\toΞ'_c$ weak decays in the light-front quark model

Hong-Wei Ke, Fang Lu, Xiao-Hai Liu, Xue-Qian Li

摘要:

本文在光阵面夸克模型中研究了$Ξ_{cc}\toΞ_c$和$Ξ_{cc}\toΞ'_c$的弱衰变。一般来说,一个天真的,但合理的猜想表明,$Ξ_{cc}$中的$cc$子系统($Ξ^{(')}_c$中的$us$对)是一个具有确定的自旋和颜色分配的双夸克。在这一过程中,初态的双夸克态不是旁观者,必须被打破。Racah转换将原始$(cc)q$分解为$c(cq)$组件的组合。因此,我们可以单独处理衰变的$c$夸克,而保持$(cq)$子系统作为旁观者。通过对内部结构的重新排列,我们数值计算了形状因子,从而得到了半轻子衰变和非轻子衰变的速率,这将是未来的测量。

英文摘要:

In this work we study the weak decays of $Ξ_{cc}\toΞ_c$ and $Ξ_{cc}\toΞ'_c$ in the light-front quark model. Generally, a naive, but reasonable conjecture suggests that the $cc$ subsystem in $Ξ_{cc}$ ( $us$ pair in $Ξ^{(')}_c$) stands as a diquark with definite spin and color assignments. During the concerned processes, the diquark of the initial state is not a spectator, and must be broken. A Racah transformation would decompose the original $(cc)q$ into a combination of $c(cq)$ components. Thus we may deal with the decaying $c$ quark alone while keeping the $(cq)$ subsystem as a spectator. With the re-arrangement of the inner structure we calculate the form factors numerically and then obtain the rates of semi-leptonic decays and non-leptonic decays, which will be measured in the future.

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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