In the general framework of Metric-Affine theories of gravity, where the metric and the connection are independent variables, we consider actions quadratic in the Ricci scalar …
C Rigouzzo, S Zell - Physical Review D, 2023 - APS
General relativity (GR) exists in different formulations, which are equivalent in pure gravity. Once matter is included, however, observable predictions generically depend on the version …
C Rigouzzo, S Zell - Physical Review D, 2022 - APS
General relativity (GR) exists in different formulations. They are equivalent in pure gravity but generically lead to distinct predictions once matter is included. After a brief overview of …
We formulate cosmological perturbation theory around the spatially curved FLRW background in the context of metric-affine gauge theory of gravity which includes torsion and …
M Piani, J Rubio - Journal of Cosmology and Astroparticle …, 2023 - iopscience.iop.org
We make use of classical lattice simulations in 3+ 1 dimensions to study the preheating stage of Higgs Inflation in Einstein-Cartan gravity. Focusing for concreteness on a simplified …
K Dimopoulos, A Karam, SS López… - Journal of Cosmology …, 2022 - iopscience.iop.org
We construct a model of quintessential inflation in Palatini R 2 gravity employing a scalar field with a simple exponential potential and coupled to gravity with a running non-minimal …
We investigate the stability of the electroweak vacuum in metric-affine gravity in which the Standard Model Higgs boson can be non-minimally coupled to both the Ricci scalar and the …
In the framework of classical scale invariance, we consider quadratic gravity in the Palatini formalism and investigate the inflationary predictions of the theory. Our model corresponds …
DY Cheong, SM Lee, SC Park - Journal of Cosmology and …, 2022 - iopscience.iop.org
We study reheating of inflationary models with general non-minimal coupling K (ϕ) R with K (ϕ)∼√(V (ϕ)) where R is the Ricci scalar and R is the inflaton potential. In particular, when …