The Top Sector

We assess the impact of top quark production at the LHC on global analyses of PDFs and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. A broad set of top quark data is considered, containing all available measurements based on the full Run II luminosity.

See the dataset section for a detailed list of these measurements.

First, we determine the constraints that this dataset provides on the large-x gluon PDF.

Second, we carry out a SMEFT interpretation of the same dataset using state-of-the-art SM and EFT theory calculations, resulting in bounds on 25 Wilson coefficients.

Subsequently, we integrate the two analyses within the SIMUnet approach to realise a simultaneous determination of the SMEFT PDFs and the EFT coefficients.

See Ref. [Kassabov et al., 2023] for more details of this study.

Results

The results of the SM PDF fits, SMEFT fits and simultaneous PDF and SMEFT determination using the SIMUnet methodology are shown at the links below.

• SM PDF fits
• SMEFT-only fit
• Simultaneous SMEFT and PDF fits