EFT observable stability under NLO corrections through interference revival

Degrande, Céline;Maltoni, Matteo
(2024) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 856 (2024)

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We illustrate the importance of interference revival when higher order corrections are included, by presenting LO and NLO differential cross-sections and K-factors for three processes that are sensitive to the dimension-6 SMEFT operator <math altimg="si1.svg"><msub><mrow><mi>O</mi></mrow><mrow><mi>W</mi></mrow></msub></math>: Z-plus-two-jets (Zjj) production through Vector Boson Fusion (VBF), leptonic diboson WZ and Wγ. We show how lifting the interference suppression at LO, through suitable variables and cuts, is necessary to get reliable predictions at NLO. We also show bounds on <math altimg="si2.svg"><msub><mrow><mi>C</mi></mrow><mrow><mi>W</mi></mrow></msub></math> obtained from these observables.
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Degrande, C., & Maltoni, M. (2024). EFT observable stability under NLO corrections through interference revival. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 856. https://doi.org/10.1016/j.physletb.2024.138970 (Original work published 2024)