Abstract
We explore the impact of Renormalisation Group (RG) effects in the Standard Model Effective Field Theory (SMEFT) interpretations of LHC measurements. We implement the RG running and mixing for the Wilson coefficients as obtained from the one-loop anomalous dimension matrix in the SMEFT into a Monte Carlo generator. This allows to consistently predict and combine in global fits collider observables characterised by different scales. As a showcase, we examine the impact of RG running in the strong coupling on the SMEFT predictions for \( t\overline{t} \) production cross sections and differential distributions as well as on the bounds on the Wilson coefficients that can be obtained from current LHC data.
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Acknowledgments
We would like to thank Céline Degrande, Gauthier Durieux, Hesham el Faham, Benjamin Fuks, Ken Mimasu, Julie Pagès, Hua-Sheng Shao and Cen Zhang for enlightening discussions. We would also like to thank Aneesh Manohar for helpful and kind discussions regarding the comparison with previous works. We are grateful to Federica Fabbri and the ATLAS Collaboration, and to Marco Zaro, for supplying us with additional results needed for our fit. RA and FM’s research was supported by the F.R.S.-FNRS with the EOS — be.h project n. 30820817, the F.R.S-FNRS project no. 40005600 and the FSR Program of UCLouvain. RA, OM and FM acknowledge support by FRS-FNRS (Belgian National Scientific Research Fund) IISN projects 4.4503.16. CS and EV are supported by the European Union’s Horizon 2020 research and innovation programme under the EFT4NP project (grant agreement no. 949451) and by a Royal Society University Research Fellowship through grant URF/R1/201553. Computational resources have been provided by the supercomputing facilities of the Université catholique de Louvain (CIS-M/UCL) and the Consortium des Équipements de Calcul Intensif en Fédération Wallonie Bruxelles (CÉCI) funded by the Fond de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under convention 2.5020.11 and by the Walloon Region.
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Aoude, R., Maltoni, F., Mattelaer, O. et al. Renormalisation group effects on SMEFT interpretations of LHC data. J. High Energ. Phys. 2023, 191 (2023). https://doi.org/10.1007/JHEP09(2023)191
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DOI: https://doi.org/10.1007/JHEP09(2023)191