Building models of inflation in no-scale supergravity

J Ellis, MAG García, N Nagata… - … Journal of Modern …, 2020 - World Scientific
After reviewing the motivations for cosmological inflation formulated in the formalism of
supersymmetry, we argue that the appropriate framework is that of no-scale supergravity …

How warm are non-thermal relics? Lyman-α bounds on out-of-equilibrium dark matter

G Ballesteros, MAG Garcia… - Journal of Cosmology and …, 2021 - iopscience.iop.org
We investigate the power spectrum of Non-Cold Dark Matter (NCDM) produced in a state out
of thermal equilibrium. We consider dark matter production from the decay of scalar …

BICEP/Keck constraints on attractor models of inflation and reheating

J Ellis, MAG Garcia, DV Nanopoulos, KA Olive… - Physical Review D, 2022 - APS
Recent BICEP/Keck data on the cosmic microwave background, in combination with
previous WMAP and Planck data, impose strong new constraints on the tilt in the scalar …

Gravitational production of spin- particles during reheating

K Kaneta, W Ke, Y Mambrini, KA Olive, S Verner - Physical Review D, 2023 - APS
We compute the density of a spin-3 2 particle, the raritron, produced at the end of inflation
due to gravitational interactions. We consider a background inflaton condensate as the …

UV Shadows in EFTs: Accidental Symmetries, Robustness and No‐Scale Supergravity

CP Burgess, M Cicoli, D Ciupke… - Fortschritte der …, 2020 - Wiley Online Library
We argue that accidental approximate scaling symmetries are robust predictions of weakly
coupled string vacua, and show that their interplay with supersymmetry and other …

Slow and safe gravitinos

E Dudas, MAG Garcia, Y Mambrini, KA Olive, M Peloso… - Physical Review D, 2021 - APS
It has been argued that supergravity models of inflation with vanishing sound speeds, cs,
lead to an unbounded growth in the production rate of gravitinos. We consider several …

Resolving the (g − 2)μ discrepancy with –SU(5) intersecting D-branes

JL Lamborn, T Li, JA Maxin, DV Nanopoulos - Journal of High Energy …, 2021 - Springer
A bstract A discrepancy between the measured anomalous magnetic moment of the muon
(g− 2) μ and computed Standard Model value now stands at a combined 4. 2σ following …

The Role of Vectors in Reheating

MAG Garcia, K Kaneta, W Ke, Y Mambrini… - arXiv preprint arXiv …, 2023 - arxiv.org
We explore various aspects concerning the role of vector bosons during the reheating
process. Generally, reheating occurs during the period of oscillations of the inflaton …

Non-oscillatory no-scale inflation

J Ellis, DV Nanopoulos, KA Olive… - Journal of Cosmology …, 2021 - iopscience.iop.org
We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in
which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is …

The role of vectors in reheating

MAG Garcia, K Kaneta, W Ke, Y Mambrini… - … of Cosmology and …, 2024 - iopscience.iop.org
We explore various aspects concerning the role of vector bosons during the reheating
process. Generally, reheating occurs during the period of oscillations of the inflaton …