10 papers
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…
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…
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…