The Large Hadron Collider (LHC) at CERN is currently our most powerful tool for exploring the fundamental laws of nature at the energy frontier. Beyond its role as a discovery machine, the LHC has also demonstrated remarkable capability as a precision machine. In this presentation, I will highlight key results from precision measurements of Standard Model processes and searches for new...
Deep-learning methods have given us new tools for finding outliers in datasets, and opens up new opportunities for new-physics search strategies based on these anomaly-detection tools. In this talk I will discuss Normalised AutoEncoders, and how self-supervised learning can be used to find effective sets of observables for the analyses.
After more than a decade of operations, the LHC is entering into a new era of precision physics. This evolution demands the refinement of our tools to uncover New Physics (NP), leveraging the statistical advantages of unprecedented data volume. Assuming NP lies beyond the current energy reach, the Standard Model Effective Field Theory (SMEFT) emerges as a powerful framework for an indirect...
The Standard Model and Higgs Effective Field Theories (SMEFT and HEFT) are well-established theoretical frameworks for the parameterization of potential new physics signals from nearly decoupled BSM sectors. The two EFTs differ in the scalar field content and - most notably - in the power counting, i.e. the way they organize BSM effects into a series expansion. While in SMEFT the power...
While the Higgs boson’s couplings to massive gauge bosons and third-generation fermions align with Standard Model predictions, those to the light quarks and the electron remain experimentally elusive. In this talk, I will classify and investigate simplified UV models that can significantly enhance Yukawa couplings of light fermions. These models generate operators in Standard Model Effective...
Some effects induced by SMEFT operators at one-loop have been fully computed, in particular, the renormalization of divergences by physical operators in single insertions of dimension-six operators. Important non-logarithmically enhanced contributions remain to be calculated. We discuss dimensional regularization in the Breitenlohner-Maison 't Hooft-Veltman scheme. The goal here consists of...
A new run on the Z-pole producing more than 1 trillion Z bosons (Tera-Z) such as proposed at FCC-ee will have indirect sensitivity to heavy new physics up to the tens of TeV scale via higher-order loop contributions to electroweak precision observables. I discuss how new physics with the right flavor structure to lie within reach of future colliders populates a specific subset of SMEFT...
A fundamental part of event generation, hadronization is currently simulated with the help of fine-tuned empirical models. Motivated by the difficulties of these models, in this talk I'll present MLHAD: a proposed alternative where the empirical model is replaced by a surrogate Machine Learning-based model to be ultimately data-trainable. I'll detail the current stage of development and...
Despite extensive efforts, the fundamental nature of Dark Matter remains unknown. Collider searches provide a unique window into potential Dark Matter interactions, particularly through the "monojet" channel—characterized by a small number of energetic jets recoiling against significant missing transverse momentum in a lepton-free final state. Traditional analysis methods often struggle to...
I will explore measurements at the LHC and future colliders that are sensitive to the relative sign of the coupling between the Higgs and the W and the Higgs and the Z. The relative sign of these couplings can be opposite that of the Standard Model in models with Higgs multiplets larger than doublet. Finally, I will explain the caveats in recent experimental searches that claim to measure the...
