Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries

Abstract We study the case of a pseudo-scalar dark matter candidate which emerges from a complex scalar singlet, charged under a global U(1) symmetry, which is broken both explicitly and spontaneously. The pseudo-scalar is naturally stabilized by the presence of a remnant discrete symmetry: dark CP....

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Autores principales:	Leonardo Coito, Carlos Faubel, Juan Herrero-García, Arcadi Santamaria
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Beyond Standard Model Cosmology of Theories beyond the SM Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/5fe71afeb3424d65bdf743df9439c5ad
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spelling	oai:doaj.org-article:5fe71afeb3424d65bdf743df9439c5ad2021-12-05T12:24:52ZDark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries10.1007/JHEP11(2021)2021029-8479https://doaj.org/article/5fe71afeb3424d65bdf743df9439c5ad2021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)202https://doaj.org/toc/1029-8479Abstract We study the case of a pseudo-scalar dark matter candidate which emerges from a complex scalar singlet, charged under a global U(1) symmetry, which is broken both explicitly and spontaneously. The pseudo-scalar is naturally stabilized by the presence of a remnant discrete symmetry: dark CP. We study and compare the phenomenology of several simplified models with only one explicit symmetry breaking term. We find that several regions of the parameter space are able to reproduce the observed dark matter abundance while respecting direct detection and invisible Higgs decay limits: in the resonances of the two scalars, featuring the known as forbidden or secluded dark matter, and through non-resonant Higgs-mediated annihilations. In some cases, combining different measurements would allow one to distinguish the breaking pattern of the symmetry. Moreover, this setup admits a light DM candidate at the sub-GeV scale. We also discuss the situation where more than one symmetry breaking term is present. In that case, the dark CP symmetry may be spontaneously broken, thus spoiling the stability of the dark matter candidate. Requiring that this does not happen imposes a constraint on the allowed parameter space. Finally, we consider an effective field theory approach valid in the pseudo-Nambu-Goldstone boson limit and when the U(1) breaking scale is much larger than the electroweak scale.Leonardo CoitoCarlos FaubelJuan Herrero-GarcíaArcadi SantamariaSpringerOpenarticleBeyond Standard ModelCosmology of Theories beyond the SMNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-34 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Beyond Standard Model Cosmology of Theories beyond the SM Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Beyond Standard Model Cosmology of Theories beyond the SM Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Leonardo Coito Carlos Faubel Juan Herrero-García Arcadi Santamaria Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries
description	Abstract We study the case of a pseudo-scalar dark matter candidate which emerges from a complex scalar singlet, charged under a global U(1) symmetry, which is broken both explicitly and spontaneously. The pseudo-scalar is naturally stabilized by the presence of a remnant discrete symmetry: dark CP. We study and compare the phenomenology of several simplified models with only one explicit symmetry breaking term. We find that several regions of the parameter space are able to reproduce the observed dark matter abundance while respecting direct detection and invisible Higgs decay limits: in the resonances of the two scalars, featuring the known as forbidden or secluded dark matter, and through non-resonant Higgs-mediated annihilations. In some cases, combining different measurements would allow one to distinguish the breaking pattern of the symmetry. Moreover, this setup admits a light DM candidate at the sub-GeV scale. We also discuss the situation where more than one symmetry breaking term is present. In that case, the dark CP symmetry may be spontaneously broken, thus spoiling the stability of the dark matter candidate. Requiring that this does not happen imposes a constraint on the allowed parameter space. Finally, we consider an effective field theory approach valid in the pseudo-Nambu-Goldstone boson limit and when the U(1) breaking scale is much larger than the electroweak scale.
format	article
author	Leonardo Coito Carlos Faubel Juan Herrero-García Arcadi Santamaria
author_facet	Leonardo Coito Carlos Faubel Juan Herrero-García Arcadi Santamaria
author_sort	Leonardo Coito
title	Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries
title_short	Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries
title_full	Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries
title_fullStr	Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries
title_full_unstemmed	Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries
title_sort	dark matter from a complex scalar singlet: the role of dark cp and other discrete symmetries
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/5fe71afeb3424d65bdf743df9439c5ad
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Dark matter from a complex scalar singlet: the role of dark CP and other discrete symmetries

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