Cornering the Two Higgs Doublet Model Type II

Atkinson, O., Black, M., Lenz, A., Rusov, A. and Wynne, J. (2022) Cornering the Two Higgs Doublet Model Type II. Journal of High Energy Physics, 2022(4), 172. (doi: 10.1007/JHEP04(2022)172)

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We perform a comprehensive study of the allowed parameter space of the Two Higgs Doublet Model of Type II (2HDM-II). Using the theoretical framework flavio we combine the most recent flavour, collider and electroweak precision observables with theoretical constraints to obtain bounds on the mass spectrum of the theory. In particular we find that the 2HDM-II fits the data slightly better than the Standard Model (SM) with best fit values of the heavy Higgs masses around 2 TeV and a value of tan β ≈ 4. Moreover, we conclude that the wrong-sign limit is disfavoured by Higgs signal strengths and excluded by the global fit by more than five standard deviations and potential deviations from the alignment limit can only be tiny. Finally we test the consequences of our study on electroweak baryogenesis via the program package BSMPT and we find that the allowed parameter space strongly discourages a strong first order phase transition within the 2HDM-II.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Atkinson, Mr Oliver
Authors: Atkinson, O., Black, M., Lenz, A., Rusov, A., and Wynne, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of High Energy Physics
ISSN (Online):1029-8479
Published Online:28 April 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Journal of High Energy Physics 2022(4): 172
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
313214STFC Glasgow Physics 2020 DTPDavid IrelandScience and Technology Facilities Council (STFC)ST/V506692/1P&S - Physics & Astronomy