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Di-Higgs boson peaks and top valleys: Interference effects in Higgs sector extensions

Basler, Philipp; Dawson, Sally; Englert, Christoph; Mühlleitner, Margarete

Abstract:
In models with extended scalars and CP violation, resonance searches in double Higgs final states stand in competition with related searches in top quark final states as optimal channels for the discovery of beyond the Standard Model (BSM) physics. This complementarity is particularly relevant for benchmark scenarios that aim to highlight multi-Higgs production as a standard candle for the study of BSM phenomena. In this paper, we compare interference effects in t
¯
t final states with correlated phenomena in double Higgs production in the complex singlet and the complex two-Higgs-doublet models. Our results indicate that the BSM discovery potential in di-Higgs searches can be underestimated in comparison to t
¯
t resonance searches. Top pair final states are typically suppressed due to destructive signal-background interference, while hh final states can be enhanced due to signal-signal interference. For parameter choices where the two heavy Higgs resonances are well separated in mass, top final states are suppressed relative to the naive signal expectation, while estimates of the production cross section times branching ratio remain accurate at the O(10%) level for double Higgs final states.

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Verlagsausgabe §
DOI: 10.5445/IR/1000105843
Veröffentlicht am 17.02.2020
Originalveröffentlichung
DOI: 10.1103/PhysRevD.101.015019
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2470-0010, 2470-0029
KITopen-ID: 1000105843
Erschienen in Physical review / D
Band 101
Heft 1
Seiten Article:015019
Vorab online veröffentlicht am 28.01.2020
Nachgewiesen in Scopus
Web of Science
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