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arXiv 2009.01623gr-qchep-th
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从复几何标量-张量引力理论研究希格斯暴胀中度规的非微扰规范不变标量涨落

Non-perturbative gauge invariant scalar fluctuations of the metric in Higgs inflation from complex geometrical scalar-tensor theory of gravity

José Edgar Madriz Aguilar, A. Bernal, M. Montes, J. Zamarripa, E. Aceves

摘要:

在这封信中,我们调查规范不变的标量波动的度量在一个非微扰形式主义的希格斯暴胀模型最近推出的框架内的几何标量张量引力理论。在这种情况下,希格斯暴胀子场起源于背景几何的外尔标量场。我们发现了一个近似的尺度不变性的功率谱的线性标量波动的度量。对于模型的某些参数,我们获得了标量光谱指数$n_s$和标量与张量之比$r$的值,这些值与普朗克2018年的结果非常吻合。此外,我们还证明了在这个模型中可以避免trans-planckian问题。

英文摘要:

In this letter we investigate gauge invariant scalar fluctuations of the metric in a non-perturbative formalism for a Higgs inflationary model recently introduced in the framework of a geometrical scalar-tensor theory of gravity. In this scenario the Higgs inflaton field has its origin in the Weyl scalar field of the background geometry. We found a nearly scale invariance of the power spectrum for linear scalar fluctuations of the metric. For certain parameters of the model we obtain values for the scalar spectral index $n_s$ and the scalar to tensor ratio $r$ that fit well with the Planck 2018 results. Besides we show that in this model the trans-planckian problem can be avoided.

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