Is There a“hyperon puzzle”Problem in Neutron Star Study?  

中子星研究是否存在“超子危机”?

作　　者：LI Ang 李昂(厦门大学天文学系,福建厦门361005)

机构地区：[1]Department of Astronomy,Xiamen University,Xiamen 361005,Fujian,China

出　　处：《原子核物理评论》2024年第3期834-838,共5页Nuclear Physics Review

基　　金：科技部SKA专项(2020SKA0120300);国家自然科学基金资助项目(12273028)。

摘　　要：Neutron star physics has wrestled with the longstanding challenge of the hyperon puzzle,attempting to reconcile lowered theoretical predictions of maximum masses due to hyperons with astrophysical observations based on the measured masses of the heaviest pulsars.In this study,we conduct a comprehensive statistical analysis of equations of state(EoS)for neutron stars with hyperons,including both laboratory data and astrophysical observations.Results from the statistical analysis reveal the important role of the correlations between the scalar and vector channels of hyperon-nucleon interactions deduced from availableΛ-separation-energy data of singleΛhypernuclei.The analysis preliminarily quantifies uncertainties in hyperon star properties due to the uncertain hyperon-nucleon interaction in dense matter,and the maximum mass of hyperon star is found to reach-2.2M_(⊙),challenging the existence of the hyperon puzzle.As part of a broader initiative connecting nuclear physics and astronomy to quantitatively determine neutron star EoS,the study provides valuable insights into the hyperon puzzle and its implications for our understanding of neutron star interiors.Moreover,the investigation addresses the lack of precise knowledge regarding hyperonic interactions,emphasizing the need for additional hypernuclear data through a combined effort involving theory,experiments,and observations.中子星物理学长期以来一直致力于解决“超子危机”的难题,旨在协调因超子而降低的最大质量理论预测与基于最重脉冲星测量质量的天体物理观测。在最近的研究中,结合超核实验室数据和最新的中子星天文观测数据,初步量化分析了超子-核子相互作用引起的超子星性质的不确定性。研究发现,超子星的最大质量可达-2.2M_(⊙)。这一结果对"超子危机"难题的存在提出了挑战。这项工作是我们基于自洽连接核物理和天文学以定量确定中子星状态方程研究计划中的一个重要步骤,揭示了从单Λ超核数据中得出的超子-核子标量部分和矢量部分相互作用之间相关性的重要性。在未来的研究中,将进一步结合相关的理论、实验和观测,以更深入地探讨中子星状态方程的众多难题。

关 键 词：neutron star equation of state HYPERON HYPERNUCLEI 

分 类 号：O571.53[理学—粒子物理与原子核物理]