Speaker
Description
Since the discovery of the Higgs boson, no clear signatures of New Physics (NP) have been observed at the LHC. This absence suggests a separation between the scale of NP and the electroweak scale. In this scenario, Effective Field Theories (EFTs) provide a model-independent framework to analyze LHC and low-energy data and search for indirect signs of physics beyond the Standard Model (SM). In particular, Drell–Yan (DY) and Higgs production in association with a gauge boson (VH) are sensitive to NP effects, especially in the high-energy tails of differential kinematic distributions. These energy-enhanced effects enable the extraction of constraints that are competitive with those from flavor observables, such as semileptonic meson decays. In this talk, I will discuss how these processes can probe dimension-six Wilson coefficients in the Standard Model EFT, highlighting the complementarity between high- and low-energy probes. I will also show how the High-Luminosity LHC can shed light on existing flavor anomalies in the extraction of the Cabibbo angle. Furthermore, recent BESIII measurements of $q^2$-binned distributions in $D \to K\mu\nu$, together with the corresponding forward–backward asymmetry, show a mild tension with SM predictions. I will discuss viable NP scenarios that can alleviate this tension while remaining consistent with bounds from high-$p_T$ DY tails.
| Discipline | Theory |
|---|---|
| Topic | Heavy Quark Decays |