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arXiv · 2306.03305

Gravitational waves during Higgs inflation from complex geometrical scalar-tensor theory of gravity

José Edgar Madriz Aguilar·A. Bernal·F. Aceves de la Cruz·J. A. Licea
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Abstract

In this paper we investigate tensor fluctuations of the metric at the end of a Higgs inflationary period in the context of a recently introduced complex geometrical scalar-tensor theory of gravity. In our model the Higgs field has a geometrical origin and the affine connection is determined by the Palatini's principle. Additionally, we consider an extra contribution to the tensor-fluctuations equation coming from the vacuum term in the energy momentum tensor associated to the Higgs field. The Higgs potential is rescaled by the non-canonicity function of the kinetic term of the field which is modified by the symmetry group of the background geometry. We obtain a nearly scale invariant spectrum and a scalar to tensor ratio in agreement with PLANCK 2018 cosmological results.

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José Edgar Madriz Aguilar, A. Bernal, F. Aceves de la Cruz, J. A. Licea. 2023-06-05. Gravitational waves during Higgs inflation from complex geometrical scalar-tensor theory of gravity. https://doi.org/10.1016/j.dark.2023.101372

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