Probing baryogenesis with neutron-antineutron oscillations

Abstract In the near future, the Deep Underground Neutrino Experiment and the European Spallation Source aim to reach unprecedented sensitivity in the search for neutron-antineutron (n- n ¯ $$ \overline{n} $$ ) oscillations, whose observation would directly imply |∆B| = 2 violation and hence might h...

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Autores principales:	Kåre Fridell, Julia Harz, Chandan Hati
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Beyond Standard Model Cosmology of Theories beyond the SM GUT Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/b97b2c53b8cb4063b85957484c3f6f78
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spelling	oai:doaj.org-article:b97b2c53b8cb4063b85957484c3f6f782021-12-05T12:24:58ZProbing baryogenesis with neutron-antineutron oscillations10.1007/JHEP11(2021)1851029-8479https://doaj.org/article/b97b2c53b8cb4063b85957484c3f6f782021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)185https://doaj.org/toc/1029-8479Abstract In the near future, the Deep Underground Neutrino Experiment and the European Spallation Source aim to reach unprecedented sensitivity in the search for neutron-antineutron (n- n ¯ $$ \overline{n} $$ ) oscillations, whose observation would directly imply \|∆B\| = 2 violation and hence might hint towards a close link to the mechanism behind the observed baryon asymmetry of the Universe. In this work, we explore the consequences of such a discovery for baryogenesis first within a model-independent effective field theory approach. We then refine our analysis by including a source of CP violation and different hierarchies between the scales of new physics using a simplified model. We analyse the implication for baryogenesis in different scenarios and confront our results with complementary experimental constraints from dinucleon decay, LHC, and meson oscillations. We find that for a small mass hierarchy between the new degrees of freedom, an observable rate for n- n ¯ $$ \overline{n} $$ oscillation would imply that the washout processes are too strong to generate any sizeable baryon asymmetry, even if the CP violation is maximal. On the other hand, for a large hierarchy between the new degrees of freedom, our analysis shows that successful baryogenesis can occur over a large part of the parameter space, opening the window to be probed by current and future colliders and upcoming n- n ¯ $$ \overline{n} $$ oscillation searches.Kåre FridellJulia HarzChandan HatiSpringerOpenarticleBeyond Standard ModelCosmology of Theories beyond the SMGUTNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-72 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Beyond Standard Model Cosmology of Theories beyond the SM GUT Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Beyond Standard Model Cosmology of Theories beyond the SM GUT Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Kåre Fridell Julia Harz Chandan Hati Probing baryogenesis with neutron-antineutron oscillations
description	Abstract In the near future, the Deep Underground Neutrino Experiment and the European Spallation Source aim to reach unprecedented sensitivity in the search for neutron-antineutron (n- n ¯ $$ \overline{n} $$ ) oscillations, whose observation would directly imply \|∆B\| = 2 violation and hence might hint towards a close link to the mechanism behind the observed baryon asymmetry of the Universe. In this work, we explore the consequences of such a discovery for baryogenesis first within a model-independent effective field theory approach. We then refine our analysis by including a source of CP violation and different hierarchies between the scales of new physics using a simplified model. We analyse the implication for baryogenesis in different scenarios and confront our results with complementary experimental constraints from dinucleon decay, LHC, and meson oscillations. We find that for a small mass hierarchy between the new degrees of freedom, an observable rate for n- n ¯ $$ \overline{n} $$ oscillation would imply that the washout processes are too strong to generate any sizeable baryon asymmetry, even if the CP violation is maximal. On the other hand, for a large hierarchy between the new degrees of freedom, our analysis shows that successful baryogenesis can occur over a large part of the parameter space, opening the window to be probed by current and future colliders and upcoming n- n ¯ $$ \overline{n} $$ oscillation searches.
format	article
author	Kåre Fridell Julia Harz Chandan Hati
author_facet	Kåre Fridell Julia Harz Chandan Hati
author_sort	Kåre Fridell
title	Probing baryogenesis with neutron-antineutron oscillations
title_short	Probing baryogenesis with neutron-antineutron oscillations
title_full	Probing baryogenesis with neutron-antineutron oscillations
title_fullStr	Probing baryogenesis with neutron-antineutron oscillations
title_full_unstemmed	Probing baryogenesis with neutron-antineutron oscillations
title_sort	probing baryogenesis with neutron-antineutron oscillations
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/b97b2c53b8cb4063b85957484c3f6f78
work_keys_str_mv	AT karefridell probingbaryogenesiswithneutronantineutronoscillations AT juliaharz probingbaryogenesiswithneutronantineutronoscillations AT chandanhati probingbaryogenesiswithneutronantineutronoscillations
_version_	1718371980891127808

Probing baryogenesis with neutron-antineutron oscillations

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