NLO corrections to $h\to b\bar b$ decay in SMEFT

Understand

We calculate the full set of next-to-leading order (NLO) corrections to $h\to b\bar{b}$ decay in the dimension-6 Standard Model Effective Field Theory (SMEFT).

• Our calculation forms the basis for precision studies of this decay mode in effective field theory, providing analytic and numerical results for contributions of the 45 dimension-6 operators appearing at NLO.
• On the technical side, we discuss several complications in NLO SMEFT computations which have not yet been addressed in the literature.
• These include subtleties in Higgs-$Z$ mixing, electric charge renormalization, and especially the treatment of tadpoles in SMEFT.