AI 中文总结
研究具有大质量矢量玻色子强反作用的轴子暴胀模型，通过修正传统模型，发现大质量规范场可使向强反作用阶段的转变平稳，避免不稳定性，为现象学上可行的暴胀实现提供可能。
AI 中文摘要
我们研究了与一个大质量的\(U(1)\)规范场耦合的轴子暴胀模型的修正。在传统无质量规范场的情形下，规范场对暴胀子产生强反作用的阶段起始存在不稳定性，其非线性演化和终点仍不清楚。我们认为，如果规范场质量足够大，向强反作用阶段的转变会平稳发生，避免这种不稳定性。这表明有大质量规范场的轴子暴胀允许可控的强反作用阶段，这类模型中可能实现现象学上可行的暴胀。
英文摘要
We study a modification of the model of axion inflation coupled to a $U(1)$ gauge field where the vector field is massive. In the conventional scenario with a massless gauge field, the onset of the regime where the gauge field strongly backreacts on the inflaton displays an instability whose nonlinear evolution and endpoint remain poorly understood. We argue that, if the gauge field is massive enough, the transition to the strong backreaction regime instead occurs smoothly, avoiding this instability. This observation suggests that axion inflation with massive gauge fields admits a controllable strong backreaction regime, so that a phenomenologically viable realization of inflation might be possible in this class of models.
Comments24 pages, 6 figures
