arXiv 2210.040712022-10nucl-thastro-ph.CO

大爆炸核合成作为新物理学的探索

Big Bang nucleosynthesis as a probe of new physics

Carlos A. Bertulani, Francis W. Hall, Benjamin I. Santoyo

备注：: 9 pages, 7 figures, version accepted for publication. Refs. 69 and 70 added upon request
DOI：: 10.1051/epjconf/202327501003

摘要：

大爆炸核合成（BBN）模型是理解早期宇宙演化的基石，它做出的开创性预测与目前对宇宙中轻元素丰度的观测非常一致。也许，唯一剩下的有待理论解决的问题就是所谓的“锂丰度问题”。专门的实验努力，以测量相关的核截面作为输入的模型，导致在轻元素原始丰度的预测精度的提高。在过去的几十年里，间接实验技术的兴起使人们能够获得超出直接测量限制的反应信息。新的理论发展也为检验原子、核、统计和粒子物理学的标准模型之外的物理学开辟了肥沃的土壤。我们回顾了我们小组的最新贡献，以寻求锂问题的可能解决方案。

英文摘要：

The Big Bang Nucleosynthesis (BBN) model is a cornerstone for the understanding of the evolution of the early universe, making seminal predictions that are in outstanding agreement with the present observation of light element abundances in the universe. Perhaps, the only remaining issue to be solved by theory is the so-called "lithium abundance problem". Dedicated experimental efforts to measure the relevant nuclear cross sections used as input of the model have lead to an increased level of accuracy in the prediction of the light element primordial abundances. The rise of indirect experimental techniques during the preceding few decades has permitted the access of reaction information beyond the limitations of direct measurements. New theoretical developments have also opened a fertile ground for tests of physics beyond the standard model of atomic, nuclear, statistics, and particle physics. We review the latest contributions of our group for possible solutions of the lithium problem.

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