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Two Higgs doublets, effective interactions and a strong first-order electroweak phase transition

Anisha; Biermann, Lisa ORCID iD icon 1; Englert, Christoph; Mühlleitner, Margarete 1
1 Institut für Theoretische Physik (ITP), Karlsruher Institut für Technologie (KIT)

Abstract:

It is well-known that type II two Higgs doublet models (2HDMs) can struggle to facilitate a strong first-order electroweak phase transition in the early universe whilst remaining theoretically appealing scenarios for many reasons. We analyse this apparent shortfall from the perspective of additional new physics. Starting from a consistent dimension-6 effective field theory Higgs potential extension, we identify the Higgs potential extensions that provide the necessary additional contributions required to achieve a strong first-order electroweak phase transition and trace their phenomenological implications for the Large Hadron Collider. In passing, we critically assess the reliability of the dimension-6 approximation depending on the expected 2HDM phenomenology. In particular, we focus on the role of Higgs pair production (resonant and non-resonant) and interference effects expected in top final states, which are the prime candidates of 2HDM exotics discoveries.

Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1029-8479, 1126-6708, 1127-2236
KITopen-ID: 1000150122
Erschienen in Journal of High Energy Physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2022
Heft 8
Seiten Art.Nr. 91
Vorab online veröffentlicht am 05.08.2022
Nachgewiesen in Scopus
Dimensions
Web of Science
OpenAlex

Verlagsausgabe §
DOI: 10.5445/IR/1000150122
Veröffentlicht am 26.08.2022
Originalveröffentlichung
DOI: 10.1007/JHEP08(2022)091
Scopus
Zitationen: 11
Web of Science
Zitationen: 3
Dimensions
Zitationen: 24
Seitenaufrufe: 42
seit 26.08.2022
Downloads: 23
seit 27.08.2022
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