论文标题
原始核合成具有不同的基本常数：改善的约束和可能解决锂问题的解决方案
Primordial nucleosynthesis with varying fundamental constants: Improved constraints and a possible solution to the Lithium problem
论文作者
论文摘要
原始核合成是热大爆炸模型的观察基石，也是标准模型以外的物理敏感探针。它的成功受到所谓锂问题的限制，为此提出了许多解决方案。我们报告了对自然基本常数变化的影响的自洽扰动分析，在标准模型的大多数扩展中，这是不可避免的，对原始核合成，重点是广泛的统一理论模型。 $ {}^4 $ He，d，$ {}^3 $ He和，$ {}^7 $ li之间的统计学比较始终如一地产生核合成级别的优先结构常数$α$的优先价值，该值比当前的实验室更大。统计显着性水平和优先变化程度取决于模型假设，但前者可以是四个以上的标准偏差，而后者始终与较低的红移的约束兼容。如果分析中未包含锂，则偏爱$α$的变化在统计上不显着。 $ {}^3 $的丰度对这种变化相对不敏感。我们的分析强调了锂问题的可行且有动机的解决方案，该解决方案需要进一步研究。
Primordial nucleosynthesis is an observational cornerstone of the Hot Big Bang model and a sensitive probe of physics beyond the standard model. Its success has been limited by the so-called Lithium problem, for which many solutions have been proposed. We report on a self-consistent perturbative analysis of the effects of variations in nature's fundamental constants, which are unavoidable in most extensions of the standard model, on primordial nucleosynthesis, focusing on a broad class of Grand Unified Theory models. A statistical comparison between theoretical predictions and observational measurements of ${}^4$He, D, ${}^3$He and, ${}^7$Li consistently yields a preferred value of the fine-structure constant $α$ at the nucleosynthesis epoch that is larger than the current laboratory one. The level of statistical significance and the preferred extent of variation depend on model assumptions but the former can be more than four standard deviations, while the latter is always compatible with constraints at lower redshifts. If Lithium is not included in the analysis, the preference for a variation of $α$ is not statistically significant. The abundance of ${}^3$He is relatively insensitive to such variations. Our analysis highlights a viable and physically motivated solution to the Lithium problem, which warrants further study.
