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 …

Probing the supersymmetry-mass scale with -term hybrid inflation

G Lazarides, C Pallis - Physical Review D, 2023 - APS
We consider F-term hybrid inflation and supersymmetry breaking in the context of a model
that largely respects a global U (1) R symmetry. The Kähler potential parametrizes the …

Superstring-inspired particle cosmology: inflation, neutrino masses, leptogenesis, dark matter & the SUSY scale

J Ellis, MAG Garcia, N Nagata… - … of Cosmology and …, 2020 - iopscience.iop.org
We develop a string-inspired model for particle cosmology, based on a flipped SU (5)× U (1)
gauge group formulated in a no-scale supergravity framework. The model realizes …

Unified no-scale attractors

J Ellis, DV Nanopoulos, KA Olive… - Journal of Cosmology …, 2019 - iopscience.iop.org
We have presented previously a general treatment of Starobinsky-like inflation in no-scale
supergravity where the tensor-to-scalar ratio r= 3 (1− ns) 2, and ns is the tilt of the scalar …

Phenomenology and cosmology of no-scale attractor models of inflation

J Ellis, DV Nanopoulos, KA Olive… - Journal of Cosmology …, 2020 - iopscience.iop.org
We have recently proposed attractor models for modulus fixing, inflation, supersymmetry
breaking and dark energy based on no-scale supergravity. In this paper we develop …

Inflation and leptogenesis in high-scale supersymmetry

K Kaneta, Y Mambrini, KA Olive, S Verner - Physical Review D, 2020 - APS
No-scale supergravity provides a successful framework for Starobinsky-like inflation models.
Two classes of models can be distinguished depending on the identification of the inflaton …

[HTML][HTML] Inflection-point sgoldstino inflation in no-scale supergravity

C Pallis - Physics Letters B, 2023 - Elsevier
We propose a modification of no-scale supergravity models which incorporates sgoldstino
stabilization and supersymmetry (SUSY) breaking with a tunable cosmological constant by …

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 …

From Minkowski to de Sitter in multifield no-scale models

J Ellis, B Nagaraj, DV Nanopoulos, KA Olive… - Journal of High Energy …, 2019 - Springer
We show the uniqueness of superpotentials leading to Minkowski vacua of single-field no-
scale supergravity models, and the construction of dS/AdS solutions using pairs of these …