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Type: Journal article
Title: Gravitational waves and electroweak baryogenesis in a global study of the extended scalar singlet model
Author: Beniwal, A.
Lewicki, M.
White, M.
Williams, A.G.
Citation: Journal of High Energy Physics, 2019; 2019(2):1-43
Publisher: Springer Nature
Issue Date: 2019
ISSN: 1126-6708
Statement of
Ankit Beniwal, Marek Lewicki, Martin White and Anthony G. Williams
Abstract: We 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.
Keywords: Beyond standard model; Higgs physics; spontaneous symmetry breaking; thermal field theory
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.
RMID: 0030110803
DOI: 10.1007/JHEP02(2019)183
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Appears in Collections:Physics publications

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