English

Generalized inflation in the context of $\kappa$-deformed theories

Cosmology and Nongalactic Astrophysics 2024-09-17 v2

Abstract

A new inflationary scenario driven by a slowly-rolling homogeneous scalar field whose potential V(φ)V\left(\varphi\right) is given by a generalized exponential function is investigated. Within the {\it slow-roll} approximation we obtain the main predictions of the model and compare them with current data from cosmic microwave background and large-scale structure observations. We show that this single scalar field model admits a wider set of solutions than usual exponential scenarios and predicts acceptable values of the spectral index, running of the spectral index and tensor-to-scalar ratio for the remaining number of {\it e}-folds lying in the interval N=55±5N = 55 \pm 5 and an energy scale on which λ2\lambda \geq \sqrt{2}; in particular, we observe that the value of the model parameter κ\kappa depends on the analysis. Finally, the primordial local non-Gaussianity is briefly discussed where we conclude that k0.02k\gtrsim 0.02 for fNLlocal1f_\text{NL}^\text{local} \ll 1.

Keywords

Cite

@article{arxiv.2409.07678,
  title  = {Generalized inflation in the context of $\kappa$-deformed theories},
  author = {B. W. Ribeiro and I. M. Macêdo and F. C. Carvalho},
  journal= {arXiv preprint arXiv:2409.07678},
  year   = {2024}
}