Speaker
Description
The Standard Model (SM) of particle physics describes the fundamental particles and their interactions with remarkable precision. Yet, it cannot explain key mysteries such as the nature of dark matter, the role of gravity, or why the universe contains more matter than antimatter.
With no new particles directly observed at the Large Hadron Collider (LHC), the most promising approach is to search for indirect signs of new physics. In fact, even very heavy, out-of-reach particles can subtly affect well-measured processes, leaving detectable imprints.
The Standard Model Effective Field Theory (SMEFT) provides a systematic, model-independent framework to capture these effects. It extends the SM by adding corrections characterized by parameters called Wilson coefficients, which can be constrained by experiments.
In this work, we constrain Wilson coefficients for the Drell–Yan process, in which a quark and an antiquark collide to produce a pair of leptons. This process is precisely measured and sensitive to several SMEFT corrections. We focus in particular on dimension-6 four-fermion operators, examining whether they can hint at new physics.
Ultimately, the goal is to exploit all available data for this process to probe physics beyond the Standard Model.
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