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Authors: Laux, Julien
Title: Exotic phenomenology of DFSZ axion models
Online publication date: 1-Feb-2024
Year of first publication: 2024
Language: english
Abstract: In this thesis we introduce exotic properties of the highly motivated axion particle which lead to a better accessibility in experimental searches. The axion is an essential ingredient of theories beyond the Standard Model of particle physics (SM) which aim to solve the strong CP problem manifesting in the absence of an electric dipole moment of the neutron (nEDM). The axion is mainly characterized by its mass and its coupling to SM particles with a special emphasis on the axion-diphoton coupling. Our focus lies on axion models which fall into the class of the Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) construction which is specified by direct axion-fermion couplings. This is in contrast to the Kim-Shifman-Vainshtein-Zakharov model which only accounts for axion couplings to gauge bosons. While the first part of this work is dedicated to new effects which arise in the axion potential with an influence on the axion mass, the second part deals with new interactions described within an effective field theory framework. These interactions comprise enhanced axion fermion couplings induced by a Dark Matter scalar field as well as axion couplings to the Higgs and Z boson which are generated through kinetic mixing effects in gauged U(1)' extensions.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
URN: urn:nbn:de:hebis:77-openscience-cacc62cd-33a3-4d11-8f59-71b07b787be85
Version: Original work
Publication type: Dissertation
License: In Copyright
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Extent: xiii, 120 Seiten ; Illustrationen, Diagramme
Appears in collections:JGU-Publikationen

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