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Talk
Title	Observing axion potentials through gravitational waves
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Author(s)	Sfakianakis, Evangelos (speaker) (University of Illinois at Urbana-Champaign)
Corporate author(s)	CERN. Geneva
Imprint	2019-06-25. - 0:17:57.
Series	(Conferences & Workshops) (String Phenomenology 2019)
Lecture note	on 2019-06-25T16:45:00
Subject category	Conferences & Workshops
Abstract	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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Submitted by	elena.gianolio@cern.ch