论文标题
$θ$依赖性光核和核合成的依赖性
$θ$-dependence of light nuclei and nucleosynthesis
论文作者
论文摘要
我们研究了QCD真空对非零$θ$的影响对光核，大爆炸核合成和恒星核合成的特性。我们的分析始于使用手性扰动理论的中子蛋白质量差异和中子衰减的$θ$依赖性的计算。然后，我们讨论使用一稳态模型的核子核子相互作用的$θ$依赖性，并计算两个核子系统的属性。利用大散射长度的四组分费米的通用性能，然后推断出三核子和四核系统的结合能。基于这些结果，我们讨论了对光核的原始丰度，恒星环境中核的产生以及对宇宙人类视图的影响。
We investigate the impact of the QCD vacuum at nonzero $θ$ on the properties of light nuclei, Big Bang nucleosynthesis, and stellar nucleosynthesis. Our analysis starts with a calculation of the $θ$-dependence of the neutron-proton mass difference and neutron decay using chiral perturbation theory. We then discuss the $θ$-dependence of the nucleon-nucleon interaction using a one-boson-exchange model and compute the properties of the two-nucleon system. Using the universal properties of four-component fermions at large scattering length, we then deduce the binding energies of the three-nucleon and four-nucleon systems. Based on these results, we discuss the implications for primordial abundances of light nuclei, the production of nuclei in stellar environments, and implications for an anthropic view of the universe.
