arXiv 2402.173442024-02hep-phhep-exhep-thnucl-exnucl-th

强磁场、重子化学势和介质各向异性对强子极化和自旋排列的影响

Impact of strong magnetic field, baryon chemical potential, and medium anisotropy on polarization and spin alignment of hadrons

Bhagyarathi Sahoo, Captain R. Singh, Raghunath Sahoo

备注：: 15 pages and 7-captioned figures. Same as the published version in EPJC
发表信息：: Eur. Phys. J. C (2025) 85:580
DOI：: 10.1140/epjc/s10052-025-14260-4

阅读 PDF

arXiv 页面 ↗HTML 原文 ↗

AI总结：

本文研究了强磁场、重子化学势和介质各向异性对重离子碰撞中强子自旋极化与排列的影响，发现极化程度依赖于味，且介质各向异性对其改变最为显著。

摘要：

近期对 $Λ$ ($\arΛ$) 超子全局自旋极化以及 $ϕ$ 和 $K^{*0}$ 矢量介子自旋排列的观测，引发了人们对研究在 GeV/TeV 能量下重离子碰撞产生的相对论流体中粒子极化的极大兴趣。在自旋极化现象的其他来源中，介质的 Debye 质量在粒子极化中起着至关重要的作用。由于温度、强磁场 ($eB$)、重子化学势 ($μ_{B}$)、介质各向异性 ($ξ$) 和涡度等因素对有效质量带来的任何改变，必然会影响粒子的自旋极化。在这项工作中，我们探讨了与强磁场、重子化学势和介质各向异性相对应的超子全局自旋极化和矢量介子自旋排列。我们发现超子的自旋极化程度依赖于味。同时，矢量介子的自旋排列取决于初始极化夸克和反夸克的强子化机制。与磁场和重子化学势相比，介质各向异性显著改变了自旋极化的程度。

英文摘要：

The recent observation of global spin polarization of $Λ$ ($\barΛ$) hyperons and the spin alignment of $ϕ$ and $K^{*0}$ vector mesons create remarkable interest in investigating the particle polarization in the relativistic fluid produced in heavy-ion collisions at GeV/TeV energies. Among other sources of spin polarization phenomena, the Debye mass of a medium plays a crucial role in particle polarization. Any modification brought to the effective mass due to the temperature, strong magnetic field ($eB$), baryonic chemical potential ($μ_{B}$), medium anisotropy ($ξ$), and vorticity, etc., certainly affects the particle spin polarization. In this work, we explore the global hyperon spin polarization and the spin alignment of vector mesons corresponding to the strong magnetic field, baryonic chemical potential, and medium anisotropy. We find that the degree of spin polarization is flavor-dependent for hyperons. Meanwhile, vector meson spin alignment depends on the hadronization mechanisms of initially polarized quarks and anti-quarks. Medium anisotropy significantly changes the degree of spin polarization compared to the magnetic field and baryon chemical potential.

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。

AI总结：

摘要：

英文摘要：

相关论文