3 citations · 3 across the 18 of their papers we have counts for
18 papers
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…
Leptogenesis and Low Reheating Temperatures
Marcos A. G. Garcia, Stephen E. Henrich, Wenqi Ke +1
We study leptogenesis during non-instantaneous reheating in the canonical type-I seesaw framework, with the dominant source of right-handed neutrino (RHN) production being non-ther…
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…
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…
Supergravity from the Bottom Up
Tony Gherghetta, Wenqi Ke
We employ on-shell methods to construct scattering amplitudes and derive effective theories involving massive spin-3/2 fermions interacting with spin 0, 1 and 2 bosons. The four-po…
On-shell recursion relations for higher-spin Compton amplitudes
Yohei Ema, Ting Gao, Wenqi Ke +2
We recursively construct tree-level electromagnetic and gravitational Compton amplitudes of higher-spin massive particles by the all-line transverse momentum shift. With three-poin…
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…
Scalar Field Fluctuations and the Production of Dark Matter
Marcos A. G. Garcia, Wenqi Ke, Yann Mambrini +2
One of the simplest possible candidates for dark matter is a stable scalar singlet beyond the Standard Model. If its mass is below the Hubble scale during inflation, long-wavelengt…
The Role of the Curvaton Post-Planck
Gongjun Choi, Wenqi Ke, Keith A. Olive
The expected improvements in the precision of inflationary physics observables including the scalar spectral index and the tensor-to-scalar ratio will reveal more than…
Effective interactions and on-shell recursion relation for massive spin 3/2
Tony Gherghetta, Wenqi Ke
We use on-shell methods to compute all three-point interactions of massive spin-3/2 particles involving a graviton and particles of spin . By employing the massive spinor-h…
Momentum shift and on-shell recursion relation for electroweak theory
Yohei Ema, Ting Gao, Wenqi Ke +3
We study the All-Line Transverse (ALT) shift which we developed for on-shell recursion of amplitudes for particles of any mass. We discuss the validity of the shift for general the…
Charged massive spin 2 and 3/2 propagation in a constant electromagnetic background
Karim Benakli, Wenqi Ke, Bruno Le Floch
We present two methods for deriving the equations of motion for charged massive spin-3/2 particles. The first approach involves utilizing the Euler-Lagrange equations derived from…
Inflaton Production of Scalar Dark Matter through Fluctuations and Scattering
Gongjun Choi, Marcos A. G. Garcia, Wenqi Ke +3
We study the effects on particle production of a Planck-suppressed coupling between the inflaton and a scalar dark matter candidate, . In the absence of this coupling, the domin…
Inflaton decay in No-Scale Supergravity and Starobinsky-like models
Yohei Ema, Marcos A. G. Garcia, Wenqi Ke +2
We consider the decay of the inflaton in Starobinsky-like models arising from either an theory of gravity or no-scale supergravity models. If Standard Model matter is…
Momentum shift and on-shell constructible massive amplitudes
Yohei Ema, Ting Gao, Wenqi Ke +3
We construct tree-level amplitude for massive particles using on-shell recursion relations based on two classes of momentum shifts: an all-line transverse shift that deforms moment…
Minimal Production of Prompt Gravitational Waves during Reheating
Gongjun Choi, Wenqi Ke, Keith A. Olive
The inflationary reheating phase begins when accelerated expansion ends. As all Standard Model particles are coupled to gravity, gravitational interactions will lead to particle pr…
The Role of Vectors in Reheating
Marcos A. G. Garcia, Kunio Kaneta, Wenqi Ke +3
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 condensa…
Gravitational Production of Spin-3/2 Particles During Reheating
Kunio Kaneta, Wenqi Ke, Yann Mambrini +2
We compute the density of a spin- particle, the raritron, produced at the end of inflation due to gravitational interactions. We consider a background inflaton condensate…