Orateur
Description
Since the discovery of the Higgs boson, no clear signs of New Physics (NP) have been observed at the LHC. This absence is consistent with a separation between the scale of NP and the electroweak scale. In this scenario, Effective Field Theories (EFTs) provide a model-independent framework for analyzing LHC data and searching for indirect effects of physics beyond the Standard Model. In this talk, I will discuss how high-energy LHC processes, such as Drell–Yan and Higgs production channels, can probe NP scenarios relevant to semileptonic transitions, emphasizing the complementarity between high-energy LHC data and low-energy measurements of semileptonic and leptonic meson decays. In particular, I will illustrate this complementarity with two examples. The first shows how LHC data on Drell–Yan production can be used to test NP scenarios proposed to explain the mild discrepancies observed in recent BESIII data on $c\to s\mu\nu$ transitions. The second shows how associated Higgs production can constrain Wilson coefficients that are poorly constrained by Drell–Yan data, and how future projections for this channel can help clarify the current tensions in the extraction of the Cabibbo angle.