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DOI: 10.5445/IR/1000090841
Veröffentlicht am 11.02.2019
DOI: 10.1140/epjc/s10052-019-6594-x

The hMSSM approach for Higgs self-couplings revisited

Liebler, Stefan; Mühlleitner, Margarete; Spira, Michael; Stadelmaier, Maximilian

We compare the decay of the heavy Higgs boson into two SM-like Higgs bosons, H→hh
, calculated in a Feynman-diagrammatic approach at the one-loop level based on the one hand on the full effective potential involving the top quark and stops in the Minimal Supersymmetric Standard Model (MSSM) accompanied by the matched Two-Higgs-Doublet Model (2HDM) as its low-energy limit and on the other hand on the hMSSM approximation. We identify missing contributions due to the top quark in the Higgs self-couplings of the hMSSM, that – when taken into account – lead to a good agreement between the hMSSM and a full MSSM calculation, at least in the limit of the Higgsino mass parameter μ
being small compared to the stop spectrum. We also thoroughly analyze momentum-dependent and kinetic corrections intrinsic to the Feynman-diagrammatic approach and the matching to the effective Lagrangian, respectively, for both our calculation in the MSSM and the hMSSM and for the latter suggest to include additional corrections from the top quark, which are independent of the unknown supersymmetric spectrum.

Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1434-6044, 1434-6052
URN: urn:nbn:de:swb:90-908419
KITopen-ID: 1000090841
Erschienen in The European physical journal / C
Band 79
Heft 1
Seiten Article: 65
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Vorab online veröffentlicht am 28.01.2019
Nachgewiesen in Scopus
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