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Welcome to the SMEFiT website!

SMEFiT is a Python package for global analyses of particle physics data in the framework of the Standard Model Effective Field Theory (SMEFT). The SMEFT represents a powerful model-independent framework to constrain, identify, and parametrise potential deviations with respect to the predictions of the Standard Model (SM). A particularly attractive feature of the SMEFT is its capability to systematically correlate deviations from the SM between different processes. The full exploitation of the SMEFT potential for indirect New Physics searches from precision measurements requires combining the information provided by the broadest possible dataset, namely carrying out extensive global analysis which is the main purpose of SMEFiT.

Project description

The SMEFiT framework has been used in the following scientific publications:

  • A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector, N. P. Hartland, F. Maltoni, E. R. Nocera, J. Rojo, E. Slade, E. Vryonidou, C. Zhang [HMN+19].

  • Constraining the SMEFT with Bayesian reweighting, S. van Beek, E. R. Nocera, J. Rojo, and E. Slade [vBNRS19].

  • SMEFT analysis of vector boson scattering and diboson data from the LHC Run II , J. Ethier, R. Gomez-Ambrosio, G. Magni, J. Rojo [EGAMR21].

  • Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC, J. Ethier, G.Magni, F. Maltoni, L. Mantani, E. R. Nocera, J. Rojo, E. Slade, E. Vryonidou, C. Zhang [EMM+21]

Results from these publications, including driver and analysis scripts, are available in the Results section.

Team description

The SMEFiT collaboration is currently composed by the following members:

  • Jaco ter Hoeve, VU Amsterdam and Nikhef Theory Group

  • Giacomo Magni, VU Amsterdam and Nikhef Theory Group

  • Fabio Maltoni, Centre for Cosmology, Particle Physics and Phenomenology Louvain and University of Bologna

  • Luca Mantani, Centre for Cosmology, Particle Physics and Phenomenology Louvain

  • Emanuele Roberto Nocera, Higgs Center for Theoretical Physics, University of Edinburgh

  • Juan Rojo, VU Amsterdam and Nikhef Theory Group

  • Eleni Vryonidou, University of Manchester

  • Cen Zhang, Center for High Energy Physics, Peking University

Former members of the SMEFiT project include

  • Jacob J. Ethier, now data analysis at Adaptfy

  • Nathan P. Hartland, now data scientist at Dott

  • Emma Slade, now data scientist at GlaxoSmithKline

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