论文标题
轴su的重力波（2）量规场：动力学驱动通货膨胀的有效场理论
Gravitational Wave from Axion-SU(2) Gauge Fields: Effective Field Theory for Kinetically Driven Inflation
论文作者
论文摘要
在温伯格的有效现场理论的通货膨胀方法的基础上，我们构建了具有偏移对称性的伪标量（Axion）Aftraton场的有效拉格朗日。在这个Lagrangian中，我们允许Axion字段通过Chern-Simons术语将轴突逐对到非亚洲仪表字段。然后，我们分析了由动力学术语驱动的一类通胀模型。我们发现，对曲率扰动幅度和非高斯性的观察约束对张量比$ r \ gtrsim的张量比产生的下限为下限，从真空波动中获得$ r \ gtrsim 5 \ times 10^{ - 3} $。来自SU（2）量规场的源引力波进一步增加了张量比比率，并使总重力波部分手性和非高斯人可以通过宇宙微波背景和直接检测实验的极化来探测。我们讨论了由于量规场产生的自旋-2颗粒的反应而对参数空间的限制。
Building on Weinberg's approach to effective field theory for inflation, we construct an effective Lagrangian for a pseudo scalar (axion) inflaton field with shift symmetry. In this Lagrangian we allow the axion field to couple to non-Abelian gauge fields via a Chern-Simons term. We then analyze a class of inflation models driven by kinetic terms. We find that the observational constraints on the amplitudes of curvature perturbations and non-Gaussianity yield a lower bound for the tensor-to-scalar ratio of $r\gtrsim 5\times 10^{-3}$ from the vacuum fluctuation. The sourced gravitational wave from SU(2) gauge fields further increases the tensor-to-scalar ratio and makes the total gravitational wave partially chiral and non-Gaussian, which can be probed by polarization of the cosmic microwave background and direct detection experiments. We discuss constraints on parameter space due to backreaction of spin-2 particles produced by the gauge field.
