重新审视介质中QCD效应对自旋极化奇异夸克星的影响
Revisiting In-Medium QCD Effects on Spin-Polarized Strange Quark Stars
AI总结：
本研究采用含QCD跑动质量的MIT袋模型，研究自旋极化对奇异夸克星性质的影响，发现最大恒星质量随极化度增大而增加，且预测与Vela X-1观测吻合，支持其为奇异夸克星并凸显介质中QCD效应的重要性。
AI中文摘要：
我们采用唯象MIT袋模型，结合依赖化学势的QCD informed跑动奇异夸克质量，研究具有自旋极化的奇异夸克物质（SQM）的性质及奇异夸克星的复杂结构。采用准粒子方法得到的有效质量用于理解SQM的框架。针对两组不同参数集构建了物态方程，得到稳定构型的每重子能量低于铁极限，从而支持Bodmer-Witten-Terazawa假说，即SQM可能是奇异物质的实际基态。随后利用该框架求解Tolman-Oppenheimer-Volkoff方程，研究自旋极化对恒星性质的影响。模型预测最大恒星质量随自旋极化度增大而增加，这一结果与此前的恒定质量模型不同。此外，模型对质量、半径和表面红移的预测与致密天体Vela X-1的观测约束高度吻合，该吻合验证了我们的理论方法，增强了Vela X-1作为奇异夸克星的候选性。总体而言，模型结果凸显了介质中QCD效应对描述致密物质的重要性。
英文摘要：
We investigate the properties of exotic Strange Quark Matter with spin polarization and the complex configuration of Strange Quark Stars using a phenomenological MIT Bag Model, enhanced by incorporating a QCD informed running strange quark mass dependent on the chemical potential. The effective mass using quasiparticle approach is utilized to understand the framework of SQM. The resulting Equation of State is constructed for two distinct parameter sets, yielding an energy per baryon below the iron limit for stable configurations and thus supporting the Bodmer Witten Terazawa hypothesis that SQM could be the actual ground state of exotic matter. This framework is then used to address the Tolman Oppenheimer Volkoff equations to study the effect of spin polarization on stellar properties. The model predicts that the maximum stellar mass increases with the degree of spin polarization, a result that diverges from previous constant mass models. Furthermore, the model predictions for mass, radius, and surface redshift are in excellent agreement with observational constraints for the compact object Vela X one. This agreement validates our theoretical approach and strengthens the candidacy of Vela X one as a Strange Quark Star. Overall, the model results highlight the importance of in medium QCD effects in describing dense matter.
