对新观测量的信息内容的分析见解
Analytic insights on the information content of new observables
摘要：
不确定性量化已成为核科学中一个快速发展的领域。物理观测的理论预测通常涉及到那些不受实验室实验和天体物理观测约束的区域。如果没有适当量化的理论误差，这种模型预测的价值有限。此外，人们经常处理涉及基本量的理论结构，这些基本量无法通过实验或观察获得。在这种情况下，特别相关的是纯中子物质的压力。在这篇文章中，我们开发了一个分析框架来回答这个问题：“新数据如何减少当前理论模型的不确定性？”“[P. G. Reinhard和W. Nazarewicz，Phys.Rev.C81，051303（R）（2010）]。简单而有见地的表达式得到量化的影响，一个或两个新的观测值的理论不确定性的两个关键量：在饱和密度的对称能的斜率和压力的纯中子物质的两倍核物质饱和密度。
英文摘要：
Uncertainty quantification has emerged as a rapidly growing field in nuclear science. Theoretical predictions of physical observables often involve extrapolations to regions that are poorly constrained by laboratory experiments and astrophysical observations. Without properly quantified theoretical errors, such model predictions are of limited value. Also, one often deals with theoretical constructs that involve fundamental quantities that are not accessible to experiment or observation. Particularly relevant in this context is the pressure of pure neutron matter. In this contribution we develop an analytic framework to answer the question of "How can new data reduce uncertainties of current theoretical models?" [P.-G. Reinhard and W. Nazarewicz, Phys. Rev. C81, 051303(R) (2010)]. Simple and insightful expressions are obtained to quantify the impact of one or two new observables on theoretical uncertainties in two critical quantities: the slope of the symmetry energy at saturation density and the pressure of pure neutron matter at twice nuclear matter saturation density.
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