186 citations · 792 across the 21 of their papers we have counts for
18 papers · 1 filter
Radiative Corrections and Reheating in Supergravity Models of Inflation
John Ellis, Tony Gherghetta, Kunio Kaneta +2
We consider the effects of radiative corrections in Starobinsky-like models of inflation, concentrating on models of inflation formulated in N=1 no-scale supergravity. Inflaton cou…
Reheating in No-Scale Models of Inflation
Ignatios Antoniadis, John Ellis, Dimitri V. Nanopoulos +2
Analogously to the suppression of inflaton decays into conformally-coupled scalar fields in the original Starobinsky model of inflation, inflaton decays to Standard Model…
Radiative Corrections in Supergravity Models of Inflation
John Ellis, Tony Gherghetta, Kunio Kaneta +2
Supergravity provides the natural supersymmetric framework for early universe cosmology. A broad class of inflationary models in no-scale supergravity yields tree-level predictions…
Planck-Scale Effects on Nucleon Decay in Minimal Supersymmetric SU(5)
John Ellis, Jason L. Evans, Shihwen Hor +2
We examine the impact on the phenomenology of the minimal supersymmetric SU(5) Grand Unified Theory (GUT) of dimension-5 operators with coefficients suppressed by the Planck mass s…
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…
Effects of Radiative Corrections on Starobinsky Inflation
John Ellis, Tony Gherghetta, Kunio Kaneta +2
We analyze radiative corrections to the Starobinsky model of inflation arising from self-interactions of the inflaton, and from its Yukawa couplings, , to matter fermions, and d…
Deformations of Starobinsky Inflation in No-Scale SU(5) and SO(10) GUTs
John Ellis, Marcos A. G. Garcia, Natsumi Nagata +2
The original Starobinsky model of inflation is consistent with Planck and other measurements of the CMB, but recent results from the ACT and SPT Collaborations hint that…
How Accidental was Inflation?
Ignatios Antoniadis, John Ellis, Wenqi Ke +2
Data on the cosmic microwave background (CMB) are discriminating between different models of inflation, disfavoring simple monomial potentials whilst being consistent with models w…
Non-universal SUSY models, , and dark matter
John Ellis, Keith A. Olive, Vassilis C. Spanos
We study the anomalous magnetic moment of the muon, , in the context of supersymmetric models beyond the CMSSM, where the unification of either the gaugino mas…
Global Analysis of Dark Matter Simplified Models with Leptophobic Spin-One Mediators using MasterCode
E. Bagnaschi, J. C. Costa, K. Sakurai +13
We report the results of a global analysis of dark matter simplified models (DMSMs) with leptophobic mediator particles of spin one, considering the cases of both vector and axial-…
Likelihood Analysis of the Sub-GUT MSSM in Light of LHC 13-TeV Data
J. C. Costa, E. Bagnaschi, K. Sakurai +13
We describe a likelihood analysis using MasterCode of variants of the MSSM in which the soft supersymmetry-breaking parameters are assumed to have universal values at some scale $M…
Supersymmetry Searches in GUT Models with Non-Universal Scalar Masses
M. Cannoni, J. Ellis, M. E. Gómez +2
We study SO(10), SU(5) and flipped SU(5) GUT models with non-universal soft supersymmetry-breaking scalar masses, exploring how they are constrained by LHC supersymmetry searches a…
The pMSSM10 after LHC Run 1
K. J. de Vries, E. A. Bagnaschi, O. Buchmueller +14
We present a frequentist analysis of the parameter space of the pMSSM10, in which the following 10 soft SUSY-breaking parameters are specified independently at the mean scalar top…
Physics at the e+ e- Linear Collider
G. Moortgat-Pick, H. Baer, M. Battaglia +60
A comprehensive review of physics at an e+e- Linear Collider in the energy range of sqrt{s}=92 GeV--3 TeV is presented in view of recent and expected LHC results, experiments from…
The CMSSM and NUHM1 in Light of 7 TeV LHC, B_s to mu+mu- and XENON100 Data
O. Buchmueller, R. Cavanaugh, M. Citron +14
We make a frequentist analysis of the parameter space of the CMSSM and NUHM1, using a Markov Chain Monte Carlo (MCMC) with 95 (221) million points to sample the CMSSM (NUHM1) param…
Phenomenological Constraints on Patterns of Supersymmetry Breaking
J. Ellis, K. A. Olive, Y. Santoso +1
Specific models of supersymmetry breaking predict relations between the trilinear and bilinear soft supersymmetry breaking parameters A_0 and B_0 at the input scale. In such models…
Post-LEP CMSSM Benchmarks for Supersymmetry
M. Battaglia, A. De Roeck, J. Ellis +5
We introduce a set of CMSSM benchmark scenarios that take into account the constraints from LEP, Tevatron, , and cosmology. The benchmark points are chosen to s…
Flipped Heavy Neutrinos from the Solar Neutrino Problem to Baryogenesis
J. Ellis, D. V. Nanopoulos, K. Olive
We discuss baryogenesis using the flipped model for lepton mass matrices. We show that the generalized see-saw mechanism in this model can not only provide MSW neutrino mix…