Speaker
Description
Extensions of the Standard Model involving additional scalar degrees of freedom arise in a wide range of beyond-Standard-Model (BSM) scenarios, including dark matter models and mechanisms addressing electroweak naturalness. In this work, we investigate such scalar extensions within an effective field theory (EFT) framework, with emphasis on higher-dimensional operators and their renormalisation group evolution.
Using perturbative quantum field theory techniques, we analyse the stability properties of the scalar potential and examine the impact of loop corrections on low-energy phenomenology. In particular, we explore constraints arising from vacuum stability and perturbative unitarity in minimal scalar extensions.
This project is part of an upcoming Master’s thesis in theoretical physics and aims to establish a systematic connection between EFT parameters and phenomenological constraints relevant to collider and cosmological observations. Preliminary analytical considerations suggest that renormalisation effects can significantly restrict the viable parameter space of such models.
This study contributes to ongoing efforts to use effective field theory as a tool for guiding physics beyond the Standard Model.