24-28 June 2019
CERN
Europe/Zurich timezone
There is a live webcast for this event.

Observing axion potentials through gravitational waves

25 Jun 2019, 16:45
15m
4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

100
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Speaker

Evangelos Sfakianakis (University of Illinois at Urbana-Champaign)

Description

I will discuss the the production of gravitational waves which are sourced by the tensor perturbation of SU(2) gauge fields coupled to a spectator axion field. Even though string theory constructions provide a variety of potentials, they can be categorized based on the number of non-stationary inflection points. I will present the resulting GW templates arising from each potential type. I will focus on the case of a modulated (axion monodromy) potential and show how future observations of CMB B-modes can probe the oscillatory behavior of an axion potential, thus shedding light into the underlying string theory construction.

Presentation Materials