Speaker
Description
Since the discovery of the Higgs boson in 2012, significant efforts have been made to understand this key component of the Standard Model of particle physics. Following years of studying and measuring the properties of this particle, the LHC is now focusing on the trilinear Higgs self-coupling and di-Higgs production. While a potential SM discovery is on the horizon –thanks to recent progress in experimental sensitivity and data gathered in the LHC– HH production can also be used to study a wide range of BSM physics, including EFT and resonant production. Interpreting HH production in terms of physics beyond the Standard Model requires the exploration of extensive parameter spaces. The high dimensionality of these spaces poses a significant computational challenge, and producing and processing the necessary simulations is a major bottleneck for current and future HH analyses. Therefore, suitable tools are needed to effectively scan these vast parameter ranges and operators, and to study BSM HH in a comprehensive and interpretable manner while maintaining consistency in the treatment of BSM effects across different searches. I will present the signal modelling tools that can overcome these challenges in the HEFT and SMEFT spaces. In particular, we will cover the matrix method used to obtain HH signal shapes as a linear combination of suitable templates. Therefore, this work provides a practical framework for comprehensive HH reinterpretations in high‑dimensional EFT scenarios