Affleck-Dine Sneutrino Inflation

25 Aug 2015, 17:55
20m
Bay ()

Bay

Particle Cosmology Theory and Experiment Particle Cosmology

Speaker

Jason Evans (University of Minnesota)

Description

Motivated by the coincidence between the Hubble scale during inflation and the typical see-saw neutrino mass scale, we present a supergravity model where the inflaton is identified with a linear combination of right-handed sneutrino fields. The model accommodates an inflaton potential that is flatter than quadratic chaotic inflation, resulting in a measurable but not yet ruled out tensor-to-scalar ratio. Small CP-violation in the neutrino mass matrix and supersymmetry breaking yield an evolution in the complex plane for the sneutrino fields. This induces a net lepton charge that, via the Affleck-Dine mechanism, can be the origin of the observed baryon asymmetry of the universe.

Primary author

Jason Evans (University of Minnesota)

Co-authors

Marco Peloso (University of Minnesota) Tony Gherghetta (Institut de Physique Theorique)

Presentation Materials