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arXiv 2206.04478hep-ph
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隐藏粲和隐藏奇异四夸克在双夸克-反双夸克方法中的质谱

Mass-Spectroscopy of hidden charm and hidden strange tetraquarks in diquark-antidiquark approach

Rohit Tiwari, Ajay Kumar Rai

AI总结:

该研究在非相对论夸克模型下,利用双夸克-反双夸克方法计算了隐藏粲和隐藏奇异四夸克态的质量,解释了X(4140)、X(4274)、X(4700)等共振态的性质。

摘要:

受近期多个实验合作组观测到奇异共振态X(4140)、X(4274)、X(4350)、X(4500)和X(4700)的启发,我们在非相对论夸克模型框架下研究了具有$cs\bar{c}\bar{s}$、$cq\bar{c}\bar{s}$、$bs\bar{b}\bar{s}$和$bq\bar{b}\bar{s}$夸克结构的四夸克系统。我们使用了双夸克-反双夸克组合的颜色反三重态-三重态构型,并考虑了所有可能的量子数来计算它们的质量。结果表明,如果双夸克-反双夸克构型的颜色结构为$\bar{3}_{c} \otimes 3$,则可能形成四夸克态,否则可能作为共振态被观测到。在本计算中,X(4274)态可以被定义为$J^{PC}$=$2^{++}$四夸克态,而X(4140)态可以被视为$J^{PC}$=$1^{++}$四夸克态。当考虑径向激发时,X(4700)可以被解释为具有$J^{PC}$=$0^{++}$的2S径向激发四夸克态。轨道激发态Y(4626)、Y(4630)和Y(4660)可以被解释为具有量子数$1^{--}$的P波四夸克态。[$bs\bar{b}\bar{s}$]和[$bq\bar{b}\bar{s}$]的质量被发现位于10.5 GeV至11.5 GeV之间,并且非常接近两个介子的阈值。

英文摘要:

We investigated the four-quark systems with quark structures of $cs\bar{c}\bar{s}$, $cq\bar{c}\bar{s}$, $bs\bar{b}\bar{s}$, and $bq\bar{b}\bar{s}$ in the framework of the non-relativistic quark model, motivated by the recent observation of exotic resonances X(4140), X(4274), X(4350), X(4500), and X(4700) reported by several experiment collaborations. The colour antitriplet-triplet configuration of diquark-antidiquark combinations with all conceivable quantum numbers have been used to calculate their masses. The results reveal that if the colour structure of the diquark-antidiquark configuration is $\bar{3}_{c} \otimes 3$, the tetraquarks structures may occur otherwise may observed as resonance. The X(4274) state, can be defined as the $J^{PC}$=$2^{++}$ tetraquark state, while the X(4140) state can be regarded as the $J^{PC}$=$1^{++}$ tetraquark state in this calculation. When radial excitation is considered, X(4700) may be explained as a 2S radial excited tetraquark state with $J^{PC}$=$0^{++}$. The orbitally excited states Y(4626), Y(4630) and Y(4660) can be explained as P-wave tetraquark with quantum number $1^{--}$. The masses of [$bs\bar{b}\bar{s}$] and [$bq\bar{b}\bar{s}$] are found to be in the range between 10.5 GeV- 11.5 GeV and are very close to two-meson thresholds.

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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