From the 1 of 10 linked papers with an AI index.
10 papers
A multi-axion model of inflation and dark matter
Marcos A. G. Garcia, Hansel Gordillo-Ruiz, Raul Henriquez-Ortiz +1
The paper proposes a multi-axion framework arising from extra dimensions where the heaviest axion drives inflation and the lighter axions later behave as dynamical dark matter, mat…
Leptogenesis and Low Reheating Temperatures
Marcos A. G. Garcia, Stephen E. Henrich, Wenqi Ke +1
We study leptogenesis during non-instantaneous reheating in the canonical type-I seesaw framework, with the dominant source of right-handed neutrino (RHN) production being non-ther…
Gravitational Waves from Matter Perturbations of Spectator Scalar Fields
Marcos A. G. Garcia, Angel Garcia-Vega, Sarunas Verner
We compute the stochastic gravitational wave background sourced at second order by a spectator scalar field coupled to the inflaton through a portal interaction $ÏÏ^2Ï…
Gravitational Waves from Isocurvature Perturbations of Spectator Scalar Fields
Marcos A. G. Garcia, Sarunas Verner
We present a mechanism for gravitational wave (GW) production from isocurvature perturbations in spectator scalar fields during inflation. These energetically subdominant fields de…
Constraints on Attractor Models of Inflation and Reheating from Planck, BICEP/Keck, ACT DR6, and SPT-3G Data
John Ellis, Marcos A. G. Garcia, Keith A. Olive +1
We analyze the latest cosmic microwave background (CMB) constraints on the scalar spectral index and tensor-to-scalar ratio from Planck 2018, BICEP/Keck 2018, the Atacama…
Gravitational Waves from Spectator Scalar Fields
Marcos A. G. Garcia, Sarunas Verner
We propose a novel mechanism for gravitational wave (GW) production sourced by spectator scalar fields during inflation. These fields, while not driving cosmic expansion, generate…