# Observing axion potentials through gravitational waves

- Institution: CERN
- Department: Conferences & Workshops
- Speaker: Evangelos Sfakianakis
- Year: 2019
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3016441)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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..

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## Lectures

1. [Observing axion potentials through gravitational waves](https://invisiblenetwork.ai/learn/cern/3016441/1dec6d10b835), 18 min (CERN's player)