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arXiv 2102.01996hep-phhep-exhep-lat
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隐魅五夸克态$P_c(4440)$、$P_c(4457)$和$P_{cs}(4459)$的磁偶极矩

Magnetic dipole moments of the hidden-charm pentaquark states: $P_c(4440)$, $P_c(4457)$ and $P_{cs}(4459)$

Ulaş Özdem

摘要:

本文采用光锥QCD求和规则计算了$P_c(4440)$、$P_c(4457)$和$P_{cs}(4459)$五夸克态的磁偶极矩,将它们分别看作双夸克-双夸克-反夸克和分子图像,量子数分别为$J^P = \frac{3}{2}^-$、$J^P = \frac{1}{2}^-$和$J^P = \frac{1}{2}^-$.在分析中,我们利用双夸克-双夸克-反夸克和分子形式的内插流,以及光子的分布振幅,得到了五夸克态的磁偶极矩。对隐魅五夸克态的磁偶极矩的理论研究是十分必要的,因为它的结果有助于我们更好地理解它们的亚结构以及作为强相互作用理论的QCD的动力学。作为副产品,我们提取了$P_c(4440)$五夸克态的电四极矩和磁八极矩。这些值显示非球形电荷分布。

英文摘要:

In this work, we employ the light-cone QCD sum rule to calculate the magnetic dipole moments of the $P_c(4440)$, $P_c(4457)$ and $P_{cs}(4459)$ pentaquark states by considering them as the diquark-diquark-antiquark and molecular pictures with quantum numbers $J^P = \frac{3}{2}^-$, $J^P = \frac{1}{2}^-$ and $J^P = \frac{1}{2}^-$, respectively. In the analyses, we use the diquark-diquark-antiquark and molecular form of interpolating currents, and photon distribution amplitudes to obtain the magnetic dipole moment of pentaquark states. Theoretical examinations on magnetic dipole moments of the hidden-charm pentaquark states, are essential as their results can help us better figure out their substructure and the dynamics of the QCD as the theory of the strong interaction. As a by product, we extract the electric quadrupole and magnetic octupole moments of the $P_c(4440)$ pentaquark. These values show a non-spherical charge 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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