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arXiv 2005.08764hep-ph
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B和B_s衰变中的X(3872)四夸克态

The X(3872) tetraquarks in B and B_s decays

Luciano Maiani, Antonio D. Polosa, Veronica Riquer

摘要:

讨论了X(3872)在B和B_s衰变中的最新数据如何说明它的四夸克态性质。建立的衰变模式,包括CMS的最新观测,解释了两个准简并,不可分辨,中性状态的混合。同样的机制也解释了X衰变中的同位旋破坏,并强烈表明潜伏的带电伙伴需要具有非常小的J/psi rho^pm分支分数,远低于当前的实验极限。此外,还得到了关于衰变到J/psi Ω末态的新的预言.最新的实验观测发现,给推力最简单的四夸克图片,并呼吁一个明确的,深入的研究带电ρ介子的最终状态。

英文摘要:

We discuss how the latest data on X(3872) in B and B_s decays speak about its tetraquark nature. The established decay pattern, including the up to date observations by CMS, are explained by the mixing of two quasi-degenerate, unresolvable, neutral states. The same mechanism also explains isospin violations in X decays and strongly suggests that the lurking charged partners are required to have very small branching fractions in J/psi rho^pm, well below the current experimental limits. In addition, a new prediction on the decay into J/psi omega final states is attained. The newest experimental observations are found to give thrust to the simplest tetraquark picture and call for a definitive, in-depth study of final states with charged rho mesons.

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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