GUT Physics in the era of the LHC

D Croon, TE Gonzalo, L Graf, N Košnik, G White - Frontiers in Physics, 2019 - frontiersin.org
Grand Unified Theories (GUTs) are one of the most interesting high-energy completions of
the Standard Model, because they provide a rich, powerful and elegant group-theoretical …

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 …

No-scale supergravity realization of the Starobinsky model of inflation

J Ellis, DV Nanopoulos, KA Olive - Physical review letters, 2013 - APS
We present a model for cosmological inflation based on a no-scale supergravity sector with
an SU (2, 1)/SU (2)× U (1) Kähler potential, a single modulus T, and an inflaton superfield Φ …

Starobinsky-like inflationary models as avatars of no-scale supergravity

J Ellis, DV Nanopoulos, KA Olive - Journal of Cosmology and …, 2013 - iopscience.iop.org
Abstract Models of cosmological inflation resembling the Starobinsky R+R 2 model emerge
naturally among the effective potentials derived from no-scale SU (N, 1)/SU (N)× U (1) …

Calculations of inflaton decays and reheating: with applications to no-scale inflation models

J Ellis, MAG Garcia, DV Nanopoulos… - Journal of Cosmology …, 2015 - iopscience.iop.org
We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation,
calculating the effective equation-of-state parameter, w, during the epoch of inflaton decay …

[HTML][HTML] Multi-natural inflation in supergravity and BICEP2

M Czerny, T Higaki, F Takahashi - Physics Letters B, 2014 - Elsevier
We revisit the recently proposed multi-natural inflation and its realization in supergravity in
light of the BICEP2 results. Multi-natural inflation is a single-field inflation model where the …

Primordial black holes and secondary gravitational waves from string inspired general no-scale supergravity

L Wu, Y Gong, T Li - Physical Review D, 2021 - APS
The formation of primordial black hole (PBH) dark matter and the generation of scalar
induced secondary gravitational waves (SIGWs) have been studied in the generic no-scale …

Multi-natural inflation in supergravity

M Czerny, T Higaki, F Takahashi - Journal of High Energy Physics, 2014 - Springer
A bstract We show that the recently proposed multi-natural inflation can be realized within
the framework of 4D\(\mathcal {N}\)= 1 supergravity. The inflaton potential mainly consists of …

Stability, reheating, and leptogenesis

D Croon, N Fernandez, D McKeen, G White - Journal of High Energy …, 2019 - Springer
A bstract In a minimal model of leptogenesis, the observed baryon asymmetry is realized
after high-scale reheating into the lightest sterile neutrino. We consider constraints on this …

A no-scale supergravity framework for sub-Planckian physics

J Ellis, DV Nanopoulos, KA Olive - Physical Review D, 2014 - APS
We propose a minimal model framework for physics below the Planck scale with the
following features:(i) it is based on no-scale supergravity, as favored in many string …