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arXiv 2103.05515hep-ph
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新观察到的共振$ X(4685) $:双夸克-反双夸克图象

Newly observed resonance $ X(4685) $: diquark-antidiquark picture

A. Türkan, J. Y. Süngü, E. Veli Veliev

摘要:

本文基于双夸克-反双夸克组态,利用量子色动力学求和规则,计算了具有自旋宇称$J^P=1^+$的$ X(4685) $态的质量和极余.对于它的质量,我们得到$ m_{X_{cs}}= 4607^{+36}_{-22} $ MeV和极残留$ λ_{X_{cs}}= 6.19^{+0.32}_{-0.24}\times 10^{-2}~\mathrm{GeV^5}$,这可能是通过其他非微扰方法以及未来的实验检查。作为副产物,$ X(4685) $的隐藏底部伙伴状态的质量被提取为$ m_{X_{bs}}= (10604-10924) $ MeV和$ λ_{X_{bs}}= (42.2-53.7)\times 10^{-2}~\mathrm{GeV^5}$附近,其可以在$Υϕ$不变质量分布中搜索。

英文摘要:

In this work, the mass and pole residue of $ X(4685) $ state with spin-parity $J^P=1^+$ are computed by the QCD sum rule approaches up to operator dimension seven based on the diquark-antidiquark configuration. For its mass we get $ m_{X_{cs}}= 4607^{+36}_{-22} $ MeV and pole residue $ λ_{X_{cs}}= 6.19^{+0.32}_{-0.24}\times 10^{-2}~\mathrm{GeV^5}$, which may be checked via other nonperturbative approaches as well as future experiments. As a by product, the mass of the hidden-bottom partner state of the $ X(4685) $ is extracted to be both around $ m_{X_{bs}}= (10604-10924) $ MeV and $ λ_{X_{bs}}= (42.2-53.7)\times 10^{-2}~\mathrm{GeV^5}$, which can be searched in the $Υϕ$ invariant mass distribution.

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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