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arXiv 2202.10380hep-phhep-exhep-lat
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对由$cc\ar{c}\ar{b}$和$bb\ar{b}\ar{c}$构成的全重四夸克的研究

Investigating full-heavy tetraquarks composed of $cc\bar{c}\bar{b}$ and $bb\bar{b}\bar{c}$

Jing Hu, Bing-Ran He, Jia-Lun Ping

AI总结:

本研究在手征夸克模型下系统探究$cc\ar{c}\ar{b}$和$bb\ar{b}\ar{c}$型全重四夸克,考虑三种结构,确认无束缚态但发现多组共振态并给出其能量与衰变宽度,为后续实验搜寻提供依据。

摘要:

本研究在手征夸克模型框架内对全重四夸克$cc\ar{c}\ar{b}$和$bb\ar{b}\ar{c}$开展了系统探究,研究中考虑了介子-介子结构、双夸克-反双夸克结构以及K结构三种结构形式。研究发现,$cc\ar{c}\ar{b}$与$bb\ar{b}\ar{c}$系统在$IJ^{P}=00^{+}$、$01^{+}$和$02^{+}$道中均不存在束缚态。不过,$cc\ar{c}\ar{b}$系统在$IJ^{P}=00^{+}$、$01^{+}$和$02^{+}$道中分别存在3种可能的共振态,对应能量为10079 MeV、10081 MeV和10177 MeV,其衰变宽度$Γ$分别为6.7-8.4 MeV、1.4-7.2 MeV和9.1-11.1 MeV。对于$bb\ar{b}\ar{c}$系统,在$IJ^{P}=00^{+}$、$01^{+}$和$02^{+}$道中也分别存在3种可能的共振态,能量分别为16474 MeV、16474 MeV和16541 MeV,衰变宽度$Γ$分别为2.2-6.1 MeV、2.2-6.9 MeV和5.3-8.5 MeV。$bc\ar{c}\ar{c}$和$cb\ar{b}\ar{b}$系统将分别得到与$cc\ar{c}\ar{b}$和$bb\ar{b}\ar{c}$相同的结果。这些全重共振态值得在未来的实验中开展搜寻。

英文摘要:

The full-heavy tetraquarks $cc\bar{c}\bar{b}$ and $bb\bar{b}\bar{c}$ are systematically investigated within the chiral quark model. The meson-meson structure, diquark-antidiquark structure and K-structure are considered in this work. There is no bound state for $cc\bar{c}\bar{b}$ and $bb\bar{b}\bar{c}$ systems in $ IJ^{P}=00^{+},01^{+}$ and $ 02^{+}$ channels. However, for $cc\bar{c}\bar{b}$ system, three possible resonance states with energy of $ 10079~{\rm MeV} $, $ 10081~{\rm MeV} $ and $ 10177~{\rm MeV} $ are found in $ IJ^{P}=00^{+},01^{+}$ and $ 02^{+}$, respectively, and their decay width $ Γ$ are $6.7-8.4~{\rm MeV} $, $1.4-7.2~{\rm MeV} $ and $9.1-11.1~{\rm MeV} $. For $bb\bar{b}\bar{c}$ system, there also exist three possible resonance states with energy of $ 16474~{\rm MeV} $, $ 16474~{\rm MeV} $ and $ 16541~{\rm MeV} $ in $ IJ^{P}=00^{+},01^{+}$ and $ 02^{+}$, respectively, and the decay widths $ Γ$ of them are $2.2-6.1~{\rm MeV} $, $2.2-6.9~{\rm MeV} $ and $5.3-8.5~{\rm MeV} $. $bc\bar{c}\bar{c}$ and $cb\bar{b}\bar{b}$ systems will have the same results as $cc\bar{c}\bar{b}$ and $bb\bar{b}\bar{c}$, respectively. These full-heavy resonance states are worthy to be searched in the future experiments.

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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