Physics (Internal)

Reconciling supersymmetry with leptogenesis by the strong CP problem and observations

This event is part of the HET Seminar Series.

Abstract:
A consistent cosmology has to explain the observed matter composition of 
the Universe and should enable solutions to all problems of the standard 
model. To this end, we investigate solutions to the gravitino 
problem of leptogenesis as origin of matter and at the same time 
implement the Peccei-Quinn mechanism as solution to the strong CP 
problem. In this overall picture a consistent cosmology appears--maybe 
counter-intuitively-- easier to achieve than particular solutions to 
each subproblem. Problems often even turn out as fortunes. More 
importantly, such scenarios are, in addition, observable in the cosmic 
microwave background and the gravitational wave background from inflation.