Automated one-loop computations in the standard model effective field theory

Aug 26, 2020
9 pages
Published in:
  • Phys.Rev.D 103 (2021) 9, 096024
  • Published: May 25, 2021
e-Print:
Report number:
  • CERN-TH-2020-140,
  • CP3-20-42

Citations per year

2020202120222023202401020304050
Abstract: (APS)
We present the automation of one-loop computations in the standard-model effective field theory at dimension 6. Our general implementation, dubbed smeft@nlo, covers all types of operators: bosonic and two- and four-fermion ones. Included ultraviolet and rational counterterms presently allow for fully differential predictions, possibly matched to the parton shower, up to the one-loop level in the strong coupling or in four-quark operator coefficients. Exact flavor symmetries are imposed among light quark generations, and an initial focus is set on top-quark interactions in the fermionic sector. We illustrate the potential of this implementation with novel loop-induced and next-to-leading-order computations relevant for top-quark, electroweak, and Higgs-boson phenomenology at the LHC and future colliders.
Note:
  • 6 pages, 3 figures, 4 tables, v2: matches published version, minor changes and new scale choice in four-top-quark production (table II)
  • Phenomenological aspects of field theory, general methods
  • new physics
  • parton: showers
  • dimension: 6
  • higher-order: 1
  • electroweak interaction
  • quantum chromodynamics
  • effective field theory
  • Higgs particle
  • top