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arXiv 2603.19151hep-phhep-exhep-lat
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隐藏魅夸克五夸克态:双夸克-双夸克-反夸克模型中的电磁结构

Hidden-charm pentaquarks: Electromagnetic structure in a diquark--diquark--antiquark model

Istanbul Aydin University(伊斯坦布尔阿因迪大学)

U. Ozdem

AI总结:

本文研究了内部结构尚不明确的奇异态的电磁性质,通过四类插值电流分析隐藏魅五夸克态的磁偶极矩,揭示了内部夸克配置和自旋对齐对磁矩的强影响,显示不同电流在相同夸克内容和量子数下有显著差异。

摘要:

我们系统地研究了内部结构尚不明确且已有不同模型提出的新奇态的电磁性质。在本工作中,我们利用QCD光锥求和规则,通过四种不同的插值电流,研究了隐藏魅五夸克态的磁偶极矩。分析考虑了轻夸克和魅夸克部分的贡献,以及高维算符,确保了算符乘积展开的收敛性和地面态极的主导地位。我们的结果表明,磁矩强烈依赖于内部夸克配置和自旋对齐,尽管具有相同的夸克内容和量子数,不同电流仍显示出显著差异。与现有研究的比较表明,分子型预测总体上一致,而紧凑型配置则产生显著不同的值,包括符号和大小的显著差异。这些发现因此突显了电磁可观测量对奇异强子内部结构的敏感性,并强调了其作为区分竞争结构模型的潜在探针作用,特别是在自旋-宇称赋值和底层夸克动力学方面。

英文摘要:

We systematically investigate the electromagnetic properties of exotic states whose internal structures remain uncertain and for which different models have been proposed. In this work, we focus on the magnetic dipole moments of hidden-charm pentaquark states using QCD light-cone sum rules with four distinct interpolating currents. The analysis accounts for contributions from both light and charm quark sectors, as well as higher-dimensional operators, ensuring convergence of the operator product expansion and dominance of the ground-state pole. Our results demonstrate a strong dependence of the magnetic moments on the internal quark configurations and spin alignments, revealing substantial variations among the different currents despite identical quark content and quantum numbers. Comparisons with existing studies indicate that while molecular-type predictions show general agreement, compact configurations yield markedly different values, including significant differences in sign and magnitude. These findings therefore underscore the sensitivity of electromagnetic observables to the internal structure of exotic hadrons and highlight their potential as probes to discriminate between competing structural models for spin-parity assignments and underlying quark dynamics.

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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