SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 31: Theory Higgs, BMS

T 31.1: Talk

Tuesday, March 21, 2023, 17:00–17:15, HSZ/0201

Higgs pair production in SMEFT at full NLO QCD: an investigation of truncation effects — •Jannis Lang — Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

We present results for Higgs boson pair production in gluon fusion at NLO (2-loop) QCD including operators in the Standard Model Effective Field Theory (SMEFT) framework. Contributions from subsets of higher order terms in 1/Λ², such as squared dimension-6 operators at cross section level and double operator insertions at amplitude level, are used as a proxy for the study of truncation effects of the SMEFT expansion. The different truncation options are contrasted to the non-linear Higgs Effective Field Theory (HEFT) framework for selected phenomenological examples.