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arXiv 1704.07005gr-qc
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具有广义暴胀子衰减率的暖幂律平台暴胀的动力学:普朗克2015年之后的预测和约束

Dynamics of warm power-law plateau inflation with a generalized inflaton decay rate: predicctions and constraints after Planck 2015

Abdul Jawad, Nelson Videla, Faiza Gulshan

摘要:

在目前的工作中,我们研究的后果,考虑一个新的家庭的单场通货膨胀模型,称为幂律高原通货膨胀,在温暖的通货膨胀框架。我们认为暴胀膨胀是由一个标准标量场驱动的,其衰减比$Γ$与标量场$ϕ$和热浴温度$T$具有一般的幂律依赖关系,热浴温度由$Γ(ϕ,T)=C_ϕ\,\frac{T^m}{ϕ^{m-1}}$给出。假设我们的模型按照强耗散机制演化,我们研究了背景和微扰动力学,得到了最相关的暴胀观测量的标量功率谱,标量谱指数及其运行,张量标量比。通过考虑暖暴胀的必要条件来约束表征我们模型的自由参数,模型的条件根据强耗散机制演化,2015年普朗克结果通过$n_s-r$平面。为了完整性,我们研究了在$n_s-dn_s/d\ln k$平面上的预测。该模型是一个强大的耗散动力学和预测值的张量标量比和运行的标量谱指数符合当前的界限由普朗克,我们的结论是,该模型是可行的。

英文摘要:

In the present work we study the consequences of considering a new family of single-field inflation models, called power-law plateau inflation, in the warm inflation framework. We consider the inflationary expansion is driven by a standard scalar field with a decay ratio $Γ$ having a generic power-law dependence with the scalar field $ϕ$ and the temperature of the thermal bath $T$ given by $Γ(ϕ,T)=C_ϕ\,\frac{T^m}{ϕ^{m-1}}$. Assuming that our model evolves according to the strong dissipative regime, we study the background and perturbative dynamics, obtaining the most relevant inflationary observables as the scalar power spectrum, the scalar spectral index and its running, and the tensor-to-scalar ratio. The free parameters characterizing our model are constrained by considering the essential condition for warm inflation, the conditions for the model evolves according to the strong dissipative regime, and the 2015 Planck results through the $n_s-r$ plane. For completeness, we study the predictions in the $n_s-dn_s/d\ln k$ plane. The model is consistent with a strong dissipative dynamics and predicts values for the tensor-to-scalar ratio and for the running of the scalar spectral index consistent with current bounds imposed by Planck, and we conclude that the model is viable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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