Research Projects

The Standard Model of particle physics (SM) has been instrumental in explaining fundamental phenomena, including Electroweak Symmetry Breaking, affirmed by the discovery of the Higgs boson. However, it cannot address key open questions, such as the nature of dark matter (DM), massive neutrinos, and matter-antimatter asymmetry. These gaps signal the need for new physics beyond the SM (BSM). This project aims to advance theoretical precision to uncover deviations from the SM and their implications for BSM physics. Rationale: Precision is critical for detecting subtle deviations in SM predictions that can reveal potential new physics. By focusing on electroweak precision in the gauge-Higgs sector and precision DM phenomenology, this research will enhance theoretical modelling to explore these uncharted domains. Scientific Objectives: 1. Collider Physics: Advance precision in Higgs-gauge interactions and multi-boson processes, critical for understanding electroweak dynamics and scalar potential. 2. Effective Field Theories (EFTs): Advance the Standard Model EFT (SMEFT) framework with higher-order corrections, renormalisation group effects, and operator mixing for robust BSM constraints. 3. Dark Matter Phenomenology: Improve theoretical tools for enhancing precision in DM observables, addressing model uncertainties. Hypotheses and Models: 1. Subtle deviations in Higgs and gauge interactions signal underlying UV-complete models. 2. SMEFT is a powerful framework for systematically exploring BSM physics, including CP violation, triple gauge couplings, Higgs couplings, and rare decays. 3. Precision matching of DM relic abundance with theory will identify viable BSM scenarios. Methodology: 1. Collider Physics: Conduct global fits across diboson, triboson, weak boson fusion, and Higgs-strahlung processes using SMEFT operators. Employ advanced techniques like interference resurrection and differential analyses to enhance precision. 2. Theoretical Development: Quantify Next-to-Leading Order (NLO) electroweak corrections.Perform SMEFT-UV matching to constrain UV-complete models. 3. Dark Matter Analysis: Automate calculations of NLO EW corrections for DM relic abundance using multiple renormalisation schemes. Address uncertainties ensuing from parameters that show up only at NLO or beyond. Significance: Achieving these goals will significantly enhance theoretical precision, enabling better comparison with experimental data. Collider physics findings will refine understanding of Higgs properties, guide future experimental designs, and deepen insight into electroweak symmetry breaking. In DM research, the development of precise theoretical tools will bridge the gap between experimental observations and theoretical models, providing critical tests for BSM scenarios. This work has the potential to advance our fundamental understanding of particle physics and the universe, laying the groundwork for transformative discoveries.