Effective 2HDM Yukawa interactions and a strong first-order electroweak phase transition

Anisha, , Azevedo, D., Biermann, L., Englert, C. and Mühlleitner, M. (2024) Effective 2HDM Yukawa interactions and a strong first-order electroweak phase transition. Journal of High Energy Physics, 2024, 45. (doi: 10.1007/JHEP02(2024)045)

Abstract

The top quark as the heaviest particle in the Standard Model (SM) defines an important mass scale for Higgs physics and the electroweak scale itself. It is therefore a well-motivated degree of freedom which could reveal the presence of new interactions beyond the SM. Correlating modifications of the top-Higgs interactions in the 2-Higgs-Doublet Model (2HDM), we analyse effective field theory deformations of these interactions from the point of view of a strong first-order electroweak phase transition (SFOEWPT). We show that such modifications are compatible with current Higgs data and that an SFOEWPT can be tantamount to a current overestimate of exotic Higgs searches’ sensitivity at the LHC in and four top quark final states. We argue that these searches remain robust from the point of accidental signal-background interference so that the current experimental strategy might well lead to 2HDM-like discoveries in the near future.

• Item Type: Articles
• Additional Information: This work was funded by a Leverhulme Trust Research Project Grant RPG-2021-031. C.E. is supported by the UK Science and Technology Facilities Council (STFC) under grant ST/X000605/1 and the Institute of Particle Physics Phenomenology Associateship Scheme. M.M. is supported by the BMBF-Project 05H21VKCCA.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Anisha, Dr Anisha and Englert, Professor Christoph
• Authors: Anisha, , Azevedo, D., Biermann, L., Englert, C., and Mühlleitner, M.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Journal of High Energy Physics
• Publisher: Springer
• ISSN: 1126-6708
• ISSN (Online): 1029-8479
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Journal of High Energy Physics 2024:45
• Publisher Policy: Reproduced under a Creative Commons License

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
311961		BSM interference effects in Higgs and Top-associated final states.	Christoph Englert	Leverhulme Trust (LEVERHUL)	RPG-2021-031	P&S - Physics & Astronomy
317278		Phenomenology from lattice QCD and collider physics	Christoph Englert	Science and Technology Facilities Council (STFC)	ST/X000605/1	P&S - Physics & Astronomy