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

Céline Degrande
(
- Louvain U., CP3
)
,
Gauthier Durieux
(
- Technion
)
,
Fabio Maltoni
(
- Louvain U., CP3 and
- INFN, Bologna and
- U. Bologna, DIFA
)
,
Ken Mimasu
(
- Louvain U., CP3
)
,
Eleni Vryonidou
(
- CERN
)

Aug 26, 2020

9 pages

Published in:

Phys.Rev.D 103 (2021) 9, 096024

Published: May 25, 2021

e-Print:

2008.11743 [hep-ph]

DOI:

10.1103/PhysRevD.103.096024

Report number:

CERN-TH-2020-140,
CP3-20-42

View in:

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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

References(72)

Figures(3)

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