Quark Matter in Neutron Star Mergers

中子星合并中的夸克物质

• 批准号: EP/Z000939/1
• 负责人: Alexander Haber
• 金额: $ 26.26万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FZ000939%2F1
• 关键词: Quark; Matter; Neutron; Star; Mergers

The existence and location of a first order phase transition from nuclear to deconfined quark matter are one of particle physics's mostexciting unanswered questions. With the discovery of gravitational waves from a binary neutron star merger in 2017 from the LIGOand VIRGO detectors, entirely new ways of investigating dense matter have emerged. Future third-generation gravitational-wavedetectors like the planned Einstein Telescope (ET) in Europe will be able to not only measure the inspiral but the actual merger of thestars. Only by improving the microscopic physics implemented in numerical simulations, we will be able to decode and constrain thegoverning forces of particle physics imprinted in the merger signal and unlock ET's full potential. This includes a proper treatment ofthe microscopic physics of chemical equilibration and deconfinement in quark matter. In previous works, the effects of the weakinteraction have been ignored, which dismisses important effects like bulk viscosity and phase conversion dissipation. The aim ofQUARKSTAR is to investigate, compute and provide all the necessary microscopic physics for the proper treatment of quark matter inmergers. The main focus is to provide the results in a way that they can be used by the merger community and implemented in futuresimulations. This might open a completely new pathway to the discovery of quark matter in dense matter.As an expert on microscopic physics, transport, and weak interaction processes in neutron star mergers, Dr. Alexander Haber will joinforces with the numerical general relativity group of Prof. Nils Andersson in Southampton. This ideal placement allows Dr. Haber toreceive all relevant training for his future academic career while presenting the ideal combination of knowledge from microscopicphysics to general relativity necessary to tackle the question of quark matter and deconfinement in neutron star mergers.

从核物质到退禁闭夸克物质的一级相变的存在和位置是粒子物理学中最令人兴奋的未解问题之一。随着LIGO和VIRGO探测器在2017年发现了来自双中子星星合并的引力波，研究致密物质的全新方法已经出现。未来的第三代引力波探测器，如计划中的欧洲爱因斯坦望远镜（ET），将不仅能够测量螺旋，而且能够测量恒星的实际合并。只有通过改进数值模拟中实现的微观物理学，我们才能解码和约束印在合并信号中的粒子物理学的主导力量，并释放ET的全部潜力。这包括对夸克物质中化学平衡和解除禁闭的微观物理学的适当处理。在以前的工作中，弱相互作用的影响被忽略了，这忽视了重要的影响，如体粘度和相变耗散。QUARKSTAR的目标是研究、计算和提供所有必要的微观物理，以便正确处理合并中的夸克物质。主要的重点是以一种可以被合并社区使用并在未来模拟中实施的方式提供结果。作为微观物理、输运和中子星星合并中弱相互作用过程的专家，亚历山大·哈伯博士将与南安普顿的尼尔斯·安德森教授的数值广义相对论小组合作。这个理想的位置使哈伯博士能够接受未来学术生涯的所有相关培训，同时提供从微观物理学到广义相对论的知识的理想组合，以解决中子星星合并中的夸克物质和去限制问题。