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arXiv · 1501.07743

Reheating phase diagram for single-field slow-roll inflationary models

Rong-Gen Cai·Zong-Kuan Guo·Shao-Jiang Wang
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Abstract

We investigate the influence on the inflationary predictions from the reheating processes characterized by the $e$-folding number $N_{\mathrm{reh}}$ and the effective equation-of-state parameter $w_{\mathrm{reh}}$ during the reheating phase. For the first time, reheating processes can be constrained in the $N_{\mathrm{reh}}\!-\!w_{\mathrm{reh}}$ plane from Planck 2015. We find that for Higgs inflation with a nonminimal coupling to gravity, the predictions are insensitive to the reheating phase for current CMB measurements. We also find that the spontaneously broken SUSY inflation and axion monodromy inflation with $ϕ^{2/3}$ potential, which with instantaneous reheating lie outside or at the edge of the $95\%$ confidence region in the $n_s\!-\!r$ plane from Planck 2015 TT,TE,EE$+$lowP, can well fit the data with the help of reheating processes. Future CMB experiments would put strong constraints on reheating processes.

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Rong-Gen Cai, Zong-Kuan Guo, Shao-Jiang Wang. 2015-09-09. Reheating phase diagram for single-field slow-roll inflationary models. https://doi.org/10.1103/physrevd.92.063506

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