From the 1 of 3 linked papers with an AI index.
3 papers
Post-Newtonian Constraints on Scalar-Tensor Gravity
Alexandros Karam, Samuel Sánchez López, José Jaime Terente DÃaz
The paper derives post‑Newtonian expressions for scalar‑tensor gravity in both metric and Palatini formalisms and compares them with Solar‑System observations, showing how the choi…
Has ACT measured radiative corrections to the tree-level Higgs-like inflation?
Ioannis D. Gialamas, Alexandros Karam, Antonio Racioppi +1
Starobinsky inflation and nonminimally coupled (NMC) Higgs inflation have been among the most favored models of the early Universe, as their predictions for the scalar spectral ind…
How deep is the dip and how tall are the wiggles in inflationary power spectra?
Vadim Briaud, Alexandros Karam, Niko Koivunen +3
We study linear scalar perturbations in single-field models of inflation featuring a non-attractor phase. These models lead to a peak in the curvature power spectrum that may resul…