论文标题
自然膨胀，强大的动态和广义异常的作用
Natural inflation, strong dynamics, and the role of generalized anomalies
论文作者
论文摘要
我们重新审视自然通货膨胀的模型，并表明潜在的$ v（a）\ sim \ cos \ frac {a} {f} $所描述的单场有效理论会随着unfaton $ a $进行大型场旅行而分解，即使对于小于planck量表的$ f $也是如此。为了解决这个问题，我们修改了潜力，以解释重度自由度（HADRON），这些自由度（HADRON）与光发电量相互交织在一起，因为后者降低了其潜力。通过将低能量的自由度嵌入到紫外线完整的尺度理论中，我们认为这两个量表之间的相互作用可以解释是由于离散的手性对称性和背景分数在Baryon数量，颜色，颜色和风味方向上的普遍混合'T Hooft异常的结果。此外，我们研究了多场通货膨胀，并表明它具有丰富的动力。与单场通货膨胀的期望相反，在山顶附近充气会激发Hadrons并破坏慢速参数。然而，我们确定了一个可以成功进行通货膨胀的安全区。我们确定宇宙膨胀至少$ 60 $ e折叠的条件，通货膨胀导致功率谱和张量与标量比与宇宙微波背景数据一致。
We revisit models of natural inflation and show that the single-field effective theory described by the potential $V(a)\sim \cos\frac{a}{f}$ breaks down as the inflaton $a$ makes large-field excursions, even for values of $f$ smaller than the Planck scale. In order to remedy the problem, we modify the potential in order to account for the heavy degrees of freedom (hadrons) that become intertwined with the light inflaton as the latter rolls down its potential. By embedding the low energy degrees of freedom into an ultraviolet complete gauge theory, we argue that the intertwining between the two scales can be explained as the result of a generalized mixed 't Hooft anomaly between the discrete chiral symmetry and background fractional fluxes in the baryon number, color, and flavor directions. Further, we study the multi-field inflation and show that it entertains rich dynamics. Inflating near the hilltop excites the hadrons and spoils the slow-roll parameters, in contradistinction with the expectations in the single-field inflation. Nevertheless, we identify a safe zone where inflation can proceed successfully. We determine the conditions under which the Universe inflates by at least $60$ e-foldings and inflation leads to a power spectrum and tensor to scalar ratio that are consistent with the Cosmic Microwave Background data.
