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Inflaton oscillations and post-inflationary reheating
Journal of Cosmology and Astroparticle Physics ( IF 6.4 ) Pub Date : 2021-04-07 , DOI: 10.1088/1475-7516/2021/04/012
MarcosA.G. Garcia 1, 2 , Kunio Kaneta 3 , Yann Mambrini 4 , KeithA. Olive 5, 6
Affiliation  

We analyze in detail the perturbative decay of the inflaton oscillating about a generic form of its potential V(ϕ) = ϕk, taking into account the effects of non-instantaneous reheating. We show that evolution of the temperature as a function of the cosmological scale factor depends on the spin statistics of the final state decay products when k > 2. We also include the inflaton-induced mass of the final states leading to either kinematic suppression or enhancement if the final states are fermionic or bosonic respectively. We compute the maximum temperature reached after inflation, the subsequent evolution of the temperature and the final reheat temperature. We apply our results to the computation of the dark matter abundance through thermal scattering during reheating. We also provide an example based on supersymmetry for the coupling of the inflaton to matter.



中文翻译:

暴胀振荡和通货膨胀后的再加热

我们详细分析了围绕其势V (ϕ) = ϕ k的一般形式振荡的暴胀子的微扰衰减,同时考虑了非瞬时再加热的影响。我们表明,作为宇宙尺度因子函数的温度演化取决于当k> 2. 如果最终状态分别是费米子或玻色子,我们还包括导致运动抑制或增强的最终状态的暴胀子诱导质量。我们计算充气后达到的最高温度、随后的温度变化和最终的再加热温度。我们将我们的结果应用于通过再加热过程中的热散射计算暗物质丰度。我们还提供了一个基于超对称性的例子,用于将暴胀子与物质耦合。

更新日期:2021-04-07
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