We investigate a novel reheating scenario proceeding through s-channel inflaton annihilation, mediated by a massive scalar. If the inflaton ϕ oscillates around the minimum of a monomial potential ∝ ϕ ⁿ, we reveal the emergence of resonance phenomena originating from the dynamic evolution of the inflaton mass for n>2. Consequently, a resonance appears in both the radiation and the temperature evolution during the reheating process. By solving the coupled Boltzmann equations, we present solutions for radiation and temperature. We find non-trivial temperature characteristics during reheating, depending on the value of n and the masses of the inflaton and mediator. Some phenomenological aspects of the model are explored. As a concrete example, we show that the same mediator participates in the genesis of dark matter, modifying the standard freeze-in dynamics. In addition, we demonstrate that the resonant reheating scenario could be tested by next-generation low- and high-frequency gravitational wave detectors.

中文翻译：

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 谐振再加热


我们研究了一种新的再加热情景，该情景通过由大标量介导的 s 通道暴胀子湮灭进行。如果暴胀子φ围绕单项势 ∝ 的最小值振荡φ ⁿ ，我们揭示了源自暴胀质量动态演化的共振现象的出现n >2.因此，一个谐振出现在再加热过程中的辐射和温度演变中。通过求解耦合玻尔兹曼方程，我们提出了辐射和温度的解。我们发现再加热过程中的温度特性非常重要，具体取决于n以及暴胀子和中介体的质量。探讨了该模型的一些现象学方面。作为一个具体的例子，我们证明了相同的介体参与了暗物质的形成，改变了标准的冻结动力学。此外，我们证明了谐振再热场景可以通过下一代低频和高频引力波探测器进行测试。