The Higgs vacuum uplifted: revisiting the electroweak phase transition with a second Higgs doublet

Dorsch, G C, Huber, S J, Mimasu, K and No, J M (2017) The Higgs vacuum uplifted: revisiting the electroweak phase transition with a second Higgs doublet. Journal of High Energy Physics, 2017 (12). ISSN 1029-8479

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Abstract

The existence of a second Higgs doublet in Nature could lead to a cosmological first order electroweak phase transition and explain the origin of the matter-antimatter asymmetry in the Universe. We explore the parameter space of such a two-Higgs-doublet-model and show that a first order electroweak phase transition strongly correlates with a significant uplifting of the Higgs vacuum w.r.t. its Standard Model value. We then obtain the spectrum and properties of the new scalars H0, A0 and H± that signal such a phase transition, showing that the decay A0 → H0Z at the LHC and a sizable deviation in the Higgs self-coupling λhhh from its SM value are sensitive indicators of a strongly first order electroweak phase transition in the 2HDM.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 09 Jan 2018 14:05
Last Modified: 09 Jan 2018 14:07
URI: http://sro.sussex.ac.uk/id/eprint/72690

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Project NameSussex Project NumberFunderFunder Ref
Theoretical Particle Physics Consortium Sussex - Royal HollowayG1449STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/L000504/1