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arXiv 1901.06296hep-thgr-qchep-ph
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Starobinsky暴胀模型的简单$F({\cal R},ϕ)$变形

A simple $F({\cal R},ϕ)$ deformation of Starobinsky inflationary model

Dhimiter D. Canko, Ioannis D. Gialamas, George P. Kodaxis

摘要:

我们研究了一个包含实标量场$ϕ$与$F({\cal R})$引力非极小耦合的模型,该模型共形地等价于包含两个实标量场的Einstein-Hilbert理论.我们考虑了$F({\cal R})$ -框架中$ϕ$场的势的三种特殊情况:消失势、质量项和Higgs势。所有这些导致非平凡的两个领域的潜力在爱因斯坦框架,在特定的方向类似于著名的Starobinsky模型。我们发现,所有这些情况下,可以产生可行的暴胀模型与目前的观测数据完全一致。

英文摘要:

We study a model including a real scalar field $ϕ$ non-minimally coupled to $F({\cal R})$ gravity, which is conformally equivalent to an Einstein-Hilbert theory, involving two real scalar fields. We consider three special cases of the potential of the field $ϕ$ in the $F({\cal R})$-frame: a vanishing potential, a mass term and a Higgs potential. All these lead to non-trivial two-field potentials in the Einstein-frame which in particular directions resemble the well-known Starobinsky model. We find, that all these cases can yield viable inflationary models in complete agreement with current observational data.

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