论文标题
纤维通胀和精确的CMB数据
Fibre inflation and precision CMB data
论文作者
论文摘要
从弦乐压缩获得的通货膨胀模型的通用特征是模型参数与宇宙的通货膨胀后演变之间的相关性。因此，通货膨胀后的演化取决于通货膨胀模型参数和准确的通货膨胀预测，要求将其纳入原始光谱的进化中。纤维通货膨胀模型是IIB型字符串理论构建的通货膨胀模型。该模型在其后充电演化中具有两个有趣的特征。模型的加热温度与模型参数直接相关。该模型还必须预测一些深色辐射，对于模型中的离散参数的某些选择可能是相当的。我们使用最新的Planck+Bicep2/Keck阵列数据来详细分析该模型，以约束模型参数，以及$ n _ {\ rm pivot} $（$ e $ e $ - 折叠数量的数量，CMB Pivot模式和计算的最终）。我们还使用公开可用的Cobaya进行了相同的分析。我们发现两种分析的结果都一致。我们的分析提供了在弦模型中提取精确通货膨胀预测所需的基本方法，该模型结合了模型参数与通货膨胀后演变之间的相关性。
Generic features of models of inflation obtained from string compactifications are the correlations between the model parameters and the postinflationary evolution of the universe. Thus, the postinflationary evolution depends on the inflationary model parameters and accurate inflationary predictions require that this be incorporated in the evolution of the primordial spectrum. The fibre inflation model is a promising model of inflation constructed in type IIB string theory. This model has two interesting features in its postinflationary evolution. The reheating temperature of the model is directly correlated with the model parameters. The model also necessarily predicts some dark radiation, which can be sizable for certain choices of discrete parameters in the model. We analyze this model in detail using publicly available codes - ModeChord and CosmoMC with the latest Planck+BICEP2/Keck array data to constrain the model parameters and $N_{\rm pivot}$ (the number of $e$-foldings between horizon exit of the CMB pivot mode and the end of inflation). We also carry out the same analysis using the publicly available code Cobaya. We find the results of both the analysis to be in agreement. Our analysis provides the basic methods necessary to extract precise inflationary prediction in string models incorporating correlations between model parameters and postinflationary evolution.
