ATLAS EFT Results in the Top Quark Sector

TL;DR

This paper discusses recent ATLAS Run-2 analyses using SMEFT to search for deviations from the Standard Model in the top quark sector, providing improved constraints on new physics effects.

Contribution

It presents new combined measurements that enhance sensitivity to SMEFT Wilson coefficients in the top quark sector using the ATLAS dataset.

Findings

Improved constraints on Wilson coefficients in the top quark sector.

Reduced degeneracies in SMEFT parameter space.

Enhanced sensitivity through combined measurements.

Abstract

With no direct evidence for new physics at the TeV scale, deviations from the Standard Model (SM) can be explored systematically through Effective Field Theories (EFTs) such as the Standard Model EFT (SMEFT). SMEFT extends the SM by introducing higher-dimensional operators parametrized by Wilson coefficients, offering a framework to probe beyond the SM (BSM) effects. This contribution highlights three recent analyses using the ATLAS Run-2 dataset at a center-of-mass energy of $\sqrt{s}$ = 13 TeV with an integrated luminosity of 140 $\text{fb}^{-1}$. Combined measurements improve the sensitivity to Wilson coefficients by reducing degeneracies and tightening constraints, exploring the potential of SMEFT in the top quark sector.