论文标题

在diquark-antidiquark方法中隐藏魅力和隐藏奇怪的tetraquarks的质谱

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

论文作者

Tiwari, Rohit, Rai, Ajay Kumar

论文摘要

我们研究了具有夸克结构为$ cs \ bar {c} \ bar {s} $的四夸克系统最近对X(4140),X(4274),X(4350),X(4500)和X(4700)的外来共振的观察结果。 diquark-antidiquark组合的颜色抗抗曲线 - 三个构型与所有可能的量子数都用于计算其质量。结果表明,如果diquark-antidiquark配置的颜色结构为$ \ bar {3} _ {c} \ otimes 3 $,则可能发生tetraquarks结构,否则可能会视为共鸣。 X(4274)状态可以定义为$ j^{pc} $ = $ 2^{++} $ tetraquark状态,而x(4140)状态可以视为$ j^{pc} $ = $ 1^{++} {++} $ tetraquark state y this Inculation inculatumuly。当考虑径向激发时,X(4700)可以用$ J^{pc} $ = $ 0^{++} $来解释为2S径向激发tetraquark状态。轨道兴奋的状态y(4626),y(4630)和y(4660)可以解释为p-wave tetraquark,量子数$ 1^{ - } $。发现[$ bs \ bar {b} \ bar {s} $]和[$ bq \ bar {b} \ bar {s} $]的质量在10.5 GEV- 11.5 GEV之间,并且非常接近两个中孔阈值。

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.

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