arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2211.09433hep-ph
收藏

夸克离域色屏蔽模型中可能存在的迷奇异分子五夸克态

Possible charmed-strange molecular pentaquarks in quark delocalization color screening model

Xuejie Liu, Yue Tan, Xiaoyun Chen, Dianyong Chen, Hongxia Huang, Jialun Ping

摘要:

受LHCb合作组报道的$T_{c\bar{s}0}^{a}(2900)^{0}$和$T_{c\bar{s}0}^{a}(2900)^{++}$态的启发,在夸克离域色屏蔽模型下,利用共振群方法对粲奇异五夸克系统进行了系统的研究.目前的结果预测的存在,一些束缚态和共振态的支持,从研究的质谱和衰变性质。具有$I(J^{P})=\frac{1}{2}(\frac{5}{2}^{-})$的$Σ_{c}^{\ast}K^{\ast}$和具有$I(J^{P})=\frac{3}{2}(\frac{5}{2}^{-})$的$ΔD_{s}^{\ast}$都通过信道耦合计算来限定。此外,在QDCSM中可获得具有$I(J^{P})=\frac{1}{2}(\frac{1}{2}^{-})$和$I(J^{P})=\frac{1}{2}(\frac{3}{2}^{-})$的共振态$Σ_{c}K^{\ast}$,其质量和总衰变宽度分别为($R^{\prime}=3342\sim3346$ MeV,$Γ_{Total}=25.5$ MeV)和($R^{\prime}=3333$ MeV,$Γ_{Total}=3.3$ MeV)。此外,还得到了与$I(J^{P})=\frac{3}{2}(\frac{1}{2}^{-})$的共振态$ΔD_{s}^{\ast}$,其质量和衰变宽度分别为3343 MeV和0.01 MeV.这些新的奇异态的预测可能为实验研究提供新的思路,我们真诚地期待更多的实验和理论研究来验证和理解的魅力奇怪的五夸克态在未来。

英文摘要:

Inspired by the states $T_{c\bar{s}0}^{a}(2900)^{0}$ and $T_{c\bar{s}0}^{a}(2900)^{++}$ reported by the LHCb Collaboration, we carry out a systematical investigation of the charm-strange pentaquark system using resonance group method in the quark delocalization color screening model. The present results predict the existence of some bound states and resonance states with support from the study of the mass spectrum and the decay properties. Both $Σ_{c}^{\ast}K^{\ast}$ with $I(J^{P})=\frac{1}{2}(\frac{5}{2}^{-})$ and $ΔD_{s}^{\ast}$ with $I(J^{P})=\frac{3}{2}(\frac{5}{2}^{-})$ are bounded by channel coupling calculation. Moreover, the resonance state $Σ_{c}K^{\ast}$ with $I(J^{P})=\frac{1}{2}(\frac{1}{2}^{-})$ and $I(J^{P})=\frac{1}{2}(\frac{3}{2}^{-})$ are available in QDCSM, the masses and the total decay widths of which are ($R^{\prime}=3342\sim3346$ MeV, $Γ_{Total}=25.5$ MeV) and ($R^{\prime}=3333$ MeV, $Γ_{Total}=3.3$ MeV), respectively. In addition, the resonance state $ΔD_{s}^{\ast}$ with $I(J^{P})=\frac{3}{2}(\frac{1}{2}^{-})$ is also obtained, the mass and the decay width of this state are 3343 MeV and 0.01 MeV, respectively. These predicted new exotic states may provide new ideas for experimental searches and we sincerely expect more experimental and theoretical research to verify and understand the charm-strange pentaquark states in the future.

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。

↑