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• W2950355055 abstract "We investigate the allowed range of reheating temperature values in light of the Planck 2015 results and the recent joint analysis of Cosmic Microwave Background (CMB) data from the BICEP2/Keck Array and Planck experiments, using monomial and binomial inflationary potentials. While the well studied $phi^2$ inflationary potential is no longer favored by current CMB data, as well as $phi^p$ with $p>2$, a $phi^1$ potential and canonical reheating ($w_{re}=0$) provide a good fit to the CMB measurements. In this last case, we find that the Planck 2015 $68%$ confidence limit upper bound on the spectral index, $n_s$, implies an upper bound on the reheating temperature of $T_{re}lesssim 6times 10^{10},{rm GeV}$, and excludes instantaneous reheating. The low reheating temperatures allowed by this model open the possiblity that dark matter could be produced during the reheating period instead of when the Universe is radiation dominated, which could lead to very different predictions for the relic density and momentum distribution of WIMPs, sterile neutrinos, and axions. We also study binomial inflationary potentials and show the effects of a small departure from a $phi^1$ potential. We find that as a subdominant $phi^2$ term in the potential increases, first instantaneous reheating becomes allowed, and then the lowest possible reheating temperature of $T_{re}=4,{rm MeV}$ is excluded by the Planck 2015 $68%$ confidence limit." @default.
• W2950355055 created "2019-06-27" @default.
• W2950355055 creator A5016092990 @default.
• W2950355055 creator A5037352963 @default.
• W2950355055 date "2015-04-15" @default.
• W2950355055 modified "2023-09-27" @default.
• W2950355055 title "Low reheating temperatures in monomial and binomial inflationary potentials" @default.
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