Robustness of ARS leptogenesis in scalar extensions

Fischer, Oliver ORCID: 0000-0003-2440-6411, Lindner, Manfred and van der Woude, Susan (2022) Robustness of ARS leptogenesis in scalar extensions. JOURNAL OF HIGH ENERGY PHYSICS, 2022 (5). 149-.

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Official URL: http://dx.doi.org/10.1007/jhep05(2022)149

Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>Extensions of the Standard Model (SM) with sterile neutrinos are well motivated from the observed oscillations of the light neutrinos and they have shown to successfully explain the Baryon Asymmetry of the Universe (BAU) through, for instance, the so-called ARS leptogenesis. Sterile neutrinos can be added in minimal ways to the SM, but many theories exist where sterile neutrinos are not the only new fields. Such theories often include scalar bosons, which brings about the possibility of further interactions between the sterile neutrinos and the SM. In this paper we consider an extension of the SM with two sterile neutrinos and one scalar singlet particle and investigate the effect that an additional, thermalised, scalar has on the ARS leptogenesis mechanism. We show that in general the created asymmetry is reduced due to additional sterile neutrino production from scalar decays. When sterile neutrinos and scalars are discovered in the laboratory, our results will provide information on the applicability of the ARS leptogenesis mechanism.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	Beyond Standard Model, Neutrino Physics, Thermal Field Theory
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	06 Jul 2022 10:34
Last Modified:	17 Mar 2024 14:30
DOI:	10.1007/JHEP05(2022)149
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3157864