http://arxiv.org/abs/1910.13944
To investigate how inflation model selection is affected by the Pantheon sample of the type Ia supernovae data and the latest local measurement of Hubble constant, we constrain the primordial power spectra by using the Planck 2015 CMB temperature and polarization power spectra data, the Planck 2018 lensing power spectra data, the prior of optical depth $\tau=0.054\pm0.007$ ($1\sigma$), the BICEP2/Keck Array CMB B-mode data, the baryon acoustic oscillation data, the Pantheon sample of the type Ia supernovae data, and the 1.91% local measurement of the Hubble constant. We find that the addition of the new type Ia supernovae data hardly changes the value of scalar spectral index $n_{\rm s}$, while adding the latest local $H_{0}$ measurement leads to a larger value of $n_{\rm s}$. With the addition of the latest local measurement result of $H_{0}$, we see that the natural inflation model is totally excluded at the $2\sigma$ level, the Starobinsky $R^{2}$ inflation model is marginally favored at around the $2\sigma$ level, and the spontaneously broken SUSY inflation model is the most favored model. In addition, we find that a running of the scalar spectral index and a running of the running are favored at the $1\sigma$ level when both of them are considered simultaneously.
R. Guo, J. Zhang and X. Zhang
Thu, 31 Oct 19
1/55
Comments: 7 pages, 3 figures
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