Higgs decays at NLO in the SMEFT

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Abstract
A bstract: The calculation of precise predictions for Higgs decays is a necessary ingredient for determining Higgs properties at the LHC and future colliders. We compute all two- and three- body Higgs decays at next-to-leading order (NLO) in both QCD and electroweak interactions using the dimension-6 Standard Model Effective Field Theory (SMEFT). Results for four-body Higgs decays that are accurate to NLO QCD/electroweak order in the SMEFT are obtained using the narrow width approximation. Our results are contained in a flexible Monte Carlo program, NEW i SH, that is publicly available and we illustrate the impact of the NLO electroweak corrections for HL-LHC, Tera-Z, and Higgstrahlung projections.
Funding Information
  • U.S. Department of Energy (DE-SC0012704)
  • Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación (RYC2022-038517-I)
  • Agencia Estatal de Investigación (CEX2020-001007-S)
  • U.S. Department of Energy (DE-SC0010102)
  • Deutsche Forschungsgemeinschaft (EXC-2094)
  • Deutsche Forschungsgemeinschaft (390783311)

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