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The O(αt+αλ+ακ)2 correction to the ρ parameter and its effect on the W boson mass calculation in the complex NMSSM

Dao, Thi Nhung; Gabelmann, Martin; Mühlleitner, Margarete 1
1 Institut für Theoretische Physik (ITP), Karlsruher Institut für Technologie (KIT)

Abstract:

We present the prediction of the electroweak ρ parameter and the W boson mass in the CP-violating Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM) at the two-loop order. The ρ parameter is calculated at the full one-loop and leading and sub-leading two-loop order O(α+αtαs+(αt+αλ+ακ)2). The new Δρ prediction is incorporated into a prediction of MW via a full supersymmetric (SUSY) one-loop calculation of Δr. Furthermore, we include all known state-of-the-art SM higher-order corrections to Δr. By comparing results for Δρ obtained using on-shell (OS) and DR renormalization conditions in the top/stop sector, we find that the scheme uncertainty is reduced at one-loop order by 55%, at two-loop O(αsαt) by 22%, and at two-loop O(αt+ακ+αλ)2 by 16%, respectively. The influence of the two-loop results on the MW mass prediction is found to be sub-leading. The new calculation is made public in the computer program NMSSMCALC. ... mehr

Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1434-6044, 1434-6052
KITopen-ID: 1000165760
Erschienen in The European Physical Journal C
Verlag Springer-Verlag
Band 83
Heft 11
Seiten Art.Nr.: 1079
Vorab online veröffentlicht am 25.11.2023
Nachgewiesen in Web of Science
Dimensions
OpenAlex
Scopus

Verlagsausgabe §
DOI: 10.5445/IR/1000165760
Veröffentlicht am 02.01.2024
Originalveröffentlichung
DOI: 10.1140/epjc/s10052-023-12236-w
Dimensions
Zitationen: 1
Seitenaufrufe: 36
seit 02.01.2024
Downloads: 28
seit 13.01.2024
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