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arXiv 1702.05010astro-ph.COgr-qchep-phhep-th
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哈勃常数的最新测量对约束暴胀模型的影响

Impact of the latest measurement of Hubble constant on constraining inflation models

Xin Zhang

摘要:

我们研究了在全局拟合中考虑$H_0$的最新局部测量对暴胀模型约束结果的影响。我们利用普朗克CMB全数据、BICEP 2和Keck阵列CMB B模数据、BAO数据以及最新的哈勃常数测量数据对$Λ$ CDM+ $r$ + $N_{\rm eff}$模型进行约束,并将得到的$(n_s, r)$的1 $σ$和2 $σ$等值线与选定的暴胀模型的理论预测进行了比较.我们发现,在这种拟合中,尺度不变性仅在3.3 $σ$水平上被排除,而$ΔN_{\rm eff}>0$在1.6 $σ$水平上更受青睐。自然暴胀模型现在在超过2 $σ$水平时被排除; Starobinsky $R^2$模型只在大约2 $σ$水平时变得更受欢迎;最受欢迎的模型成为自发破缺的SUSY暴胀模型;在这种情况下,膜暴胀模型也与当前数据很好地一致。

英文摘要:

We investigate how the constraint results of inflation models are affected by considering the latest local measurement of $H_0$ in the global fit. We use the observational data, including the Planck CMB full data, the BICEP2 and Keck Array CMB B-mode data, the BAO data, and the latest measurement of Hubble constant, to constrain the $Λ$CDM+$r$+$N_{\rm eff}$ model, and the obtained 1$σ$ and 2$σ$ contours of $(n_s, r)$ are compared to the theoretical predictions of selected inflationary models. We find that, in this fit, the scale invariance is only excluded at the 3.3$σ$ level, and $ΔN_{\rm eff}>0$ is favored at the 1.6$σ$ level. The natural inflation model is now excluded at more than 2$σ$ level; the Starobinsky $R^2$ model becomes only favored at around 2$σ$ level; the most favored model becomes the spontaneously broken SUSY inflation model; and, the brane inflation model is also well consistent with the current data, in this case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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