论文标题
lambda超子和超子拼图
The lambda hyperon and the hyperon puzzle
论文作者
论文摘要
中子恒星提供了独特的条件,可以在极度密度下研究冷致密的核物质。由于这些极端条件,预计包括Hyperos在内的额外的HADRONIC自由度。这次演讲将重点介绍超音素对Ofstate中子恒星方程的影响。特别是,将讨论Lambda Hyperon的贡献,作为描述异国情调的状态星程方程的第一个近似值。所考虑的系统是通过交换介子并将相对论平均野外理论交换来描述强核力量的地方。正如预期的那样,包含lambda HyperON的状态(EOS)的中子星方程会柔和。柔软的EOS将减少具有这种EOS的模型中子恒星可实现的最大质量。虽然在高密度系统中肯定并不意外,但似乎存在与高质量中子星星的观察相矛盾。这种矛盾被称为“超子拼图”。从大量新的无线电图(例如平方公里阵列(SKA))中预期的观察数据涌入将提供可以支持的观测值,并能够得到核物质的理论模型。因此,对超声问题的研究不仅与核理论有关,而且在本地与博茨瓦纳作为SKA的非洲伙伴国家。
Neutron stars provide unique conditions to study cold dense nuclear matter at extreme densities. Due to these extreme conditions additional hadronic degrees of freedom are expected to be populated,including hyperons. This talk will focus on the influence of hyperons on the neutron star equation ofstate. In particular the contribution of the lambda hyperon will be discussed, as a first approximation to describing exotic neutron star equations of state. The system under consideration is where the strong nuclear force is described by the exchange of mesons and applying the relativistic mean field theory to study dense nuclear matter. As expected, the inclusion of the lambda hyperon softens the neutron star equation of state (EoS). A softer EoS will reduce the maximum mass attainable by the modeled neutron star with such EoS. While hyperons are certainly not unexpected in high density systems, but there presence seems to be contradicted by observations of high mass neutron stars. This contradiction is known as the "hyperon puzzle". The expected influx of observational data from massive new radio-telescopes like the Square Kilometer Array (SKA) will provide observations that can be supported and evolve theoretical models of nuclear matter. Therefore, the study of hyperonic matter is not only relevant to nuclear theory, but also locally to Botswana as an African partner country of the SKA.