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arXiv 2402.01334hep-ph
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三夸克图像下利用光前夸克模型研究三重重子的弱衰变

Weak decays of the triply heavy baryons in the three-quark picture with the light-front quark model

Fang Lu, Hong-Wei Ke, Xiao-Hai Liu

AI总结:

本研究针对三重重子$\Omega_{QQQ}$不适用夸克-双夸克图像的问题,采用光前夸克模型的三夸克图像计算跃迁强子形状因子,给出多种半轻与非轻衰变模式的宽度预言,为实验发现三重重子提供参考。

摘要:

我们在光前夸克模型中研究了三重重子$\Omega_{QQQ}$的弱衰变。由于$\Omega_{QQQ}$由三个不可区分的全同重夸克组成,常用的夸克-双夸克图像似乎不再适用。我们转而采用重子的三夸克图像,将三个夸克视为独立个体。我们计算了跃迁的强子形状因子,并给出了半轻衰变模式$\Omega_{ccc}\to \Xi_{cc}/ \Omega_{cc}+ l\bar\nu_l$、$\Omega_{bbb}\to \Xi_{bb}+ l \bar\nu_l$以及非轻衰变模式$\Omega_{ccc}\to \Xi_{cc}/\Omega_{cc}+ M$、$\Omega_{bbb}\to \Xi_{bb}+ M$的衰变宽度预言。我们的研究可为未来实验发现三重重子提供指导。

英文摘要:

We investigate the weak decays of the triply heavy baryon $Ω_{QQQ}$ in the light-front quark model. Since $Ω_{QQQ}$ consists of three indistinguishable identical heavy quarks, the commonly adopted quark-diquark picture does not seem to be valid anymore. Instead, we employ the three-quark picture for baryons where the three quarks are regarded as individual quarks. We calculate the hadronic form factors for the transitions and give predictions for the decay widths of the semi-leptonic decay modes $Ω_{ccc}\to Ξ_{cc}/ Ω_{cc}+ l\barν_l$, $Ω_{bbb}\to Ξ_{bb}+ l \barν_l$ and the non-leptonic decay modes $Ω_{ccc}\to Ξ_{cc}/Ω_{cc}+ M$, $Ω_{bbb}\to Ξ_{bb}+ M$. Our study can be a guide for future experiments to discover the triply heavy baryons.

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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