Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 64: Invited Topical Talks III

T 64.1: Invited Topical Talk

Donnerstag, 19. März 2026, 13:45–14:15, AudiMax

Charting the Higgs Sector with Effective Field Theories — •Ilaria Brivio — Dipartimento di Fisica e Astronomia, Universita' di Bologna and INFN, Sezione di Bologna, via Irnerio 46, Bologna, Italy

With no clear signs of new resonances at the LHC, searches for physics beyond the Standard Model are increasingly targeting small indirect effects potentially induced by heavy physics beyond the collider's reach, which are captured by Effective Field Theories (EFTs). While the Standard Model EFT (SMEFT) is the established framework for this purpose, there is growing interest in scenarios that lie outside its underlying assumptions. An interesting way to explore them is by adopting the Higgs EFT (HEFT) -- also known as electroweak chiral Lagrangian -- which provides a more general EFT extension of the SM.

In this talk, I will introduce the basic ideas behind HEFT and explain how it differs conceptually from SMEFT. I will highlight the kinds of phenomenological signatures that distinguish the two approaches and provide an overview of the state of the art in the theoretical development of HEFT and its application at the LHC.

Keywords: effective field theories; HEFT; SMEFT