RT Journal Article
T1 Vector dark matter production during inflation and reheating
A1 Ruiz Cembranos, José Alberto
A1 Garay Elizondo, Luis Javier
A1 Parra López, Álvaro
A1 Sánchez Velázquez, José M.
AB Gravitational particle production of spectator fields due to the expansion universe during the inflationary and reheating phases of the early universe is of particular interest in the context of dark matter, since it allows to constrain the properties of the dark candidate by comparing the density of particles produced with the observed dark matter abundance. In such processes, tachyonic instabilities arise as a consequence of the coupling to the curvature, greatly enhancing mode production. In this work, we consider a massive vector field that is coupled to the curvature scalar and the Ricci tensor only, and study its gravitational production through inflation and reheating. We show how the mechanism is more efficient than in the case of a non -minimally coupled scalar field, giving rise to larger abundances. Moreover, we analyze the importance of the coupling to the Ricci tensor, which increases tachyonic instabilities in the system, and constrain the mass of the dark particle and the values of the coupling constants by comparing the corresponding abundance with observations.
PB IOP Publishing
YR 2024
FD 2024-02-05
LK https://hdl.handle.net/20.500.14352/108217
UL https://hdl.handle.net/20.500.14352/108217
LA eng
NO Jose A.R. Cembranos et al JCAP02(2024)013
NO CA21106CA21136FPU20/05603ANR-11-IDEX-0003-01ANR-10-LABX-0038
NO Ministerio de Ciencia e Innovación (España)
NO European Commission
NO Ministerio de Universidades (España)
NO Université Paris-Saclay
DS Docta Complutense
RD 6 abr 2025