稀有同位素束流装置（FRIB）及其他装置中核β衰变的未来方向
Future directions in nuclear $β$ decay at FRIB and beyond
AI总结：
围绕核β衰变相关研究机会，FRIB理论联盟举行专题项目。白皮书总结讨论要点，概述相关实验工具技术、核多体方法现状，强调可通过弱衰变解决的重要科学问题，呈现领域现状与未来机会。
AI中文摘要：
受与核结构、天体物理学和核β衰变基本对称性相关研究机会的推动，稀有同位素束流装置（FRIB）理论联盟专题项目“FRIB中核β衰变的未来方向”于2025年9月举行。本白皮书总结了为期两周项目的主要讨论要点，旨在呈现该领域现状，突出未来工作的重要问题和机会。我们概述了用于现代β衰变研究的实验工具和技术，讨论了用于研究β衰变的核多体方法的现状，并强调了可通过弱衰变解决的重要科学问题。
英文摘要：
Motivated by the opportunities presented for studies relevant to nuclear structure, astrophysics, and fundamental symmetries with nuclear $β$ decay, the Facility for Rare Isotope Beams (FRIB) Theory Alliance topical program ``Future Directions in Nuclear $β$ Decays at FRIB'' was held in September of 2025. This white paper summarizes the main points of discussion over the two-week program, and it aims to provide a snapshot of the current status of the field while also highlighting important questions and opportunities for future work. We provide an overview of the experimental tools and techniques that enable modern $β$ decay studies, discuss the current state of nuclear many-body approaches used to study $β$ decays, and highlight the important science questions that can be addressed by weak decays.
