Standard Model Effective Field Theory (SMEFT) is not only a practical tool for searching for small deviations from SM expectations in data, but is also a well-defined quantum field theory.
In this talk I focus on interesting field-theoretical features involved in calculations of EW corrections in SMEFT. Compared to the SM, these include subtleties in Higgs-Z mixing, electric charge renormalisation, gauge fixing, and the treatment of tadpoles when using hybrid renormalisation schemes where some parameters are renormalised in the MS-bar scheme and some in the on-shell scheme.
Benjamin Pecjak (Durham): EW corrections in SMEFT
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- Pecjak_19_March_2024.pdf 209 KB
