Gravitational waves and electroweak baryogenesis in a global study of the extended scalar singlet model

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dc.contributor.authorBeniwal, A.
dc.contributor.authorLewicki, M.
dc.contributor.authorWhite, M.
dc.contributor.authorWilliams, A.G.
dc.date.issued2019
dc.description.abstractWe perform a global fit of the extended scalar singlet model with a fermionic dark matter (DM) candidate. Using the most up-to-date results from the Planck measured DM relic density, direct detection limits from the XENON1T (2018) experiment, electroweak precision observables and Higgs searches at colliders, we constrain the 7-dimensional model parameter space. We also find regions in the model parameter space where a successful electroweak baryogenesis (EWBG) can be viable. This allows us to compute the gravitational wave (GW) signals arising from the phase transition, and discuss the potential discovery prospects of the model at current and future GW experiments. Our global fit places a strong upper and lower limit on the second scalar mass, the fermion DM mass and the scalar-fermion DM coupling. In agreement with previous studies, we find that our model can simultaneously yield a strong first-order phase transition and saturate the observed DM abundance. More importantly, the GW spectra of viable points can often be within reach of future GW experiments such as LISA, DECIGO and BBO.
dc.description.statementofresponsibilityAnkit Beniwal, Marek Lewicki, Martin White and Anthony G. Williams
dc.identifier.citationThe Journal of High Energy Physics, 2019; 2019(2):1-43
dc.identifier.doi10.1007/JHEP02(2019)183
dc.identifier.issn1126-6708
dc.identifier.issn1029-8479
dc.identifier.orcidBeniwal, A. [0000-0003-4849-0611]
dc.identifier.orcidWhite, M. [0000-0001-5474-4580]
dc.identifier.orcidWilliams, A.G. [0000-0002-1472-1592]
dc.identifier.urihttp://hdl.handle.net/2440/119864
dc.language.isoen
dc.publisherSpringer Nature
dc.relation.granthttp://purl.org/au-research/grants/arc/CE110001104
dc.relation.granthttp://purl.org/au-research/grants/arc/FT140100244
dc.rights© The Authors. Article funded by SCOAP³. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
dc.source.urihttps://doi.org/10.1007/jhep02(2019)183
dc.subjectBeyond standard model; Higgs physics; spontaneous symmetry breaking; thermal field theory
dc.titleGravitational waves and electroweak baryogenesis in a global study of the extended scalar singlet model
dc.typeJournal article
pubs.publication-statusPublished

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