协变能量密度泛函的贝叶斯精化
Bayesian refinement of covariant energy density functionals
AI总结：
本文通过贝叶斯框架整合脉冲星、NICER、LIGO-Virgo及手征有效场论等多源约束，精化协变能量密度泛函，改善富中子物质状态方程描述，但仍难以同时重现PREX/CREX报告的两种原子核中子皮厚度。
摘要：
过去五年，我们在确定富中子物质状态方程方面取得了显著进展。理论、实验和观测领域的最新进展已被纳入贝叶斯框架，以精化先前由有限核性质标定的现有协变能量密度泛函。具体而言，来自脉冲星计时对中子星最大质量的约束、NICER任务对恒星半径的约束、LIGO-Virgo合作组对潮汐形变能力的约束，以及手征有效场论预测的纯中子物质动力学，都对这些模型产生了显著的精化作用，尤其是对那些预言较硬对称能的模型。然而，即使经过这些改进，我们发现同时重现PREX/CREX合作组最近报告的${}^{208}$Pb和${}^{48}$Ca的中子皮厚度仍然具有挑战性。
英文摘要：
The last five years have seen remarkable progress in our quest to determine the equation of state of neutron rich matter. Recent advances across the theoretical, experimental, and observational landscape have been incorporated in a Bayesian framework to refine existing covariant energy density functionals previously calibrated by the properties of finite nuclei. In particular, constraints on the maximum neutron star mass from pulsar timing, on stellar radii from the NICER mission, on tidal deformabilities from the LIGO-Virgo collaboration, and on the dynamics of pure neutron matter as predicted from chiral effective field theories, have resulted in significant refinements to the models, particularly to those predicting a stiff symmetry energy. Still, even after these improvements, we find challenging to reproduce simultaneously the neutron skin thickness of both ${}^{208}$Pb and ${}^{48}$Ca recently reported by the PREX/CREX collaboration.
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