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Models with extended Higgs sectors at future e⁺e⁻ colliders

Azevedo, Duarte; Ferreira, Pedro; Mühlleitner, M. Margarete; Santos, Rui; Wittbrodt, Jonas

We discuss the phenomenology of several beyond the Standard Model (SM) extensions that include extended Higgs sectors. The models discussed are the SM extended by a complex singlet field, the 2-Higgs-doublet model with a CP-conserving and a CP-violating scalar sector, the singlet extension of the 2-Higgs-doublet model, and the next-to-minimal supersymmetric SM extension. All the above models have at least three neutral scalars, with one being the 125 GeV Higgs boson. This common feature allows us to compare the production and decay rates of the other two scalars and therefore to compare their behavior at future electron-positron colliders. Using predictions on the expected precision of the 125 GeV Higgs boson couplings at these colliders we are able to obtain the allowed admixtures of either a singlet or a pseudoscalar to the observed 125 GeV scalar. Therefore, even if no new scalar is found, the expected precision at future electron-positron colliders, such as CLIC, will certainly contribute to a clearer picture of the nature of the discovered Higgs boson.

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Verlagsausgabe §
DOI: 10.5445/IR/1000095063
Veröffentlicht am 24.05.2019
DOI: 10.1103/PhysRevD.99.055013
Zitationen: 6
Web of Science
Zitationen: 5
Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2470-0010, 2470-0029
KITopen-ID: 1000095063
Erschienen in Physical review / D
Band 99
Heft 5
Seiten Article: 055013
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 12.03.2019
Nachgewiesen in Web of Science
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