AI 中文总结
该研究提出类轴子粒子通过修改标准模型规范场位形引发重子数破坏以产生重子不对称性，且轴子-光子耦合会产生低频趋近常数的CMB谱畸变。
AI 中文摘要
我们探讨了早期宇宙中重子不对称性的产生机制，证明类轴子粒子可修正标准模型中相关规范场位形，进而改变其色散关系。这种陈-西蒙斯数的变化会引发重子数破坏，我们推导了由此产生的重子数与轴子背景演化的关系，估算了该机制产生的重子不对称性，表明可自然实现观测值。此外，轴子-光子耦合会产生宇宙微波背景（CMB）谱畸变，与传统的y型和μ型畸变不同，该畸变在低频下趋近于常数。
英文摘要
We discuss a mechanism for generating the baryon asymmetry in the early universe. We show that an axion-like particle can modify the related gauge field configurations in the Standard Model, thereby altering their dispersion relations. This change in the Chern-Simons number can source a violation of baryon number. We derive the relationship between the resulting baryon number and the evolution of the axion background. We estimate the baryon asymmetry produced via this mechanism and show that the observed value can be naturally achieved. We also show that axion photon coupling produces Cosmic Microwave Background spectral distortion. Our results show that the resulting distortion approaches a constant at low frequencies, unlike the conventional y-type and $μ$-type distortions.
Comments9 pages, 4 figures
