Göttingen 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 67: Higgs Physics VII (HH and Trilinear Coupling)

T 67.10: Vortrag

Donnerstag, 3. April 2025, 18:30–18:45, ZHG104

Renormalisation scheme dependence of the trilinear Higgs coupling in extended scalar sectors — •Marc Hannig¹, Marco Menen^1,2, Elina Fuchs^1,2,3, Henning Bahl⁴, Georg Weiglein^3,5, and Johannes Braathen³ — ¹Institut für Theoretische Physik, Leibniz Universität Hannover — ²Physikalisch-Technische Bundesanstalt (PTB), Braunschweig — ³Deutsches Elektronen- Synchrotron DESY, Hamburg — ⁴Institut für Theoretische Physik, Universität Heidelberg — ⁵II. Institut für Theoretische Physik, Universität Hamburg

The trilinear Higgs coupling λ_hhh of the detected Higgs boson is a critical observable for understanding of the Higgs potential. With improving experimental bounds in the future, the theoretical predictions of this coupling for constraining BSM parameters become increasingly significant. Using the public code anyH3, this study investigates the numerical stability of different renormalization schemes for λ_hhh at one-loop level in extended scalar sectors. By comparing predictions of the coupling for various schemes, this study develops algorithmic criteria for switching between renormalisation schemes depending on the parameter region of the BSM model. This approach ensures numerically stable and reliable predictions for the trilinear Higgs coupling.

Keywords: Higgs; Renormalisation; Trilinear coupling; BSM models; Self coupling