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arXiv 2401.07458nucl-thhep-phnucl-ex
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夸克-胶子等离子体中的弱磁效应与局域自旋极化

Weak magnetic effect in quark-gluon plasma and local spin polarization

Jing-An Sun, Li Yan

AI总结:

本文提出夸克-胶子等离子体中的弱磁效应,作为耗散修正解释重离子碰撞中Lambda超子局域自旋极化的实验观测,并阐明其二阶与三阶调制的排序关系。

摘要:

我们提出弱磁效应,它作为夸克相空间分布函数的耗散修正,在接近局域热平衡的夸克-胶子等离子体中涌现,是对已观测到的Lambda超子局域自旋极化的一个新贡献。在有限磁场强度下,该磁场强度与先前对重离子碰撞中磁场的估计一致,我们能够解释实验上观测到的所有中心度类别中的Lambda局域自旋极化。此外,弱磁效应在实验中Lambda局域自旋极化的二阶与三阶调制之间的排序中发挥着明确的作用。

英文摘要:

We propose the weak magnetic effect, which emerges in quark-gluon plasma close to local thermal equilibrium as the dissipative correction to the quark phase space distribution function, as a novel contribution to the observed Lambda hyperon local spin polarization. With a finite field strength, which is consistent with previous estimate of the magnetic field in heavy-ion collisions, one is able to explain the experimentally observed Lambda local spin polarization through all centrality classes. Moreover, the weak magnetic effect plays an unambiguous role in the ordering between the second-order and the third-order modulations of the Lambda local spin polarization in experiments.

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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